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1. Bytes Returned 0 1 Error type Description Returns the operating state of the storage device If the Extended Status available bit is set then the Extended Status MAY be read with the Extended Status command set When the Extended Status is read the Extended Status Available bit is cleared Bit Description See Error Reference source not found Table 8 Get Device Operating State Bit Description Loopback Enabled a Extended Status Available 10 3 14 Enable External Loopback Opcode 0x0c Type Set Description This command explicitly enables the external loopback mode of the storage device with Ethernet interface While in this mode the storage device with Ethernet interface SGMII interfaces retransmit any packet received on that interface This command is ignored if the loopback is enabled http opencompute org 17 10 3 15 Get Write Status Opcode 0x0d Type Get Bytes Returned 0 1 Status Info 2 Opcode Description Returns an unsigned 16 bit integer and a 1 byte Opcode This value MAY be used to determine whether or not the command was successful The opcode returned is that of the write that this status applies to Table 9 Get Write Status Info Byte Definition ve status Unrecognised Command Length Mismatch Checksum Mismatch o o success o 10 3 16 Get Command Set Version Opcode 0x0e Type Get Bytes Returned 0 Major Revision Number 1 Minor Revision Number 2 Sub minor Revision Number2. For set commands the payload is typically the parameters being set although not every set operation requires parameters Get commands can make use of the payload field on the dummy write as a parameter to indicate what data to return or on the read portion of the transaction which consists of the data requested by the get operation All integers greater than 8 bits follow big endian format 10 2 6 Checksum format Appended to the end of every transaction is a single byte checksum This checksum takes the form of a modular sum where each character is summed as if it were an unsigned integer Overflow bits are discarded and the two s complement of the final sum is appended as the checksum byte Validation of the data MAY be accomplished by summing the characters in the same fashion including the checksum Valid data SHOULD result in a sum of zero A nonzero result indicates an invalid message 10 2 7 Delay requirements Discrete Stop and Start conditions SHOULD be issued between any two transactions rather than a repeated start which is not supported In addition a 100 us delay SHOULD be placed between any two transactions to ensure no reads or writes are lost 12 6 November 2014 Open Compute Project Storage Storage device with Ethernet interface 10 3 Open Commands 10 3 1 Commands overview IC commands for the storage device with Ethernet interface are listed in Table 2 See referenced paragraphs for detailed descriptions T
3. Compute Project Storage Storage device with Ethernet interface Rev 4 Author Alvin Cox Seagate Technology LLC Author Asghar Riahi Seagate Technology LLC Author Bryan Wyatt Seagate Technology LLC Scope This specification defines the technical requirements for the storage device with Ethernet interface Contents LE SN 2 2 NN 2 Me USS EE EE NE NE ER RT 3 2 TD 3 D GE EE 4 5 1 Me 4 5 2 LICOR EE EEE EE meee eeeteesnsee one 4 GE EO ES EE 5 7 Definitions symbols abbreviations key WOrdS rnrrnrrunnnnnunnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnennnnnnnnnnenne 5 7 1 DEI sco tesa cvenstotees E E A E A E 5 7 2 Symbols and abbreviatiOnis Varsel 5 7 3 EN 60 EEE E EE es 5 7 4 Editorial CONV ENUONS inccsssesxsieesrcenswardeavvsoninbasisieusuiedenbesnaieaidedersebuseebaswuesevensereensuiveduvenniiiees 6 8 Mechancal CHAPACTEMISTICS ssusscroccscaceannnsscoresncurtennevanvsotuhveesnendcessaubentartesiursabeheseareusivessuibontesaciiess 6 8 1 DEVICE and system ONE are 6 2 HENNING 10 9 1 TX and RX SIENAS osesiccadwcacedeacdatenatwsadscistndgennndveaareseiadecaduiatesiceedgsecadesntedeentaihealanatedsaneoeens 10 9 2 CNN 10 9 3 UN sresuccanaeusnerciocadenaeosgeeaconasaaeaeensecasnanscedovanseeas assess ue soeneseeusesasvanseeassanacen teas 10 9 4 PREEENE TL 10 9 5 VENDOR PENE PN 10 10 Ethernet storage device C communication mmnnrrrrrvrrvvvrrrnvrrnnnnrrnsvrrnnssnnsvrrnnnsnssnvrrnesssnnnvene 10 il 65s ONETO See eee S eee er eee ee 10 1
4. Description eth1 1 Status Byte see Table 4 IPv4 Octet 1 IPv4 Octet 2 IPV6 Hextet 1 L IPv4 Octet 4 IPV6 Hextet 2 L IPv4 Netmask Octet 2 IPv6 Hextet 3 L IPv4 Netmask Octet 4 IPV6 Hextet 4 H 3 Description This command sets the network interface speed of the specified network interface on the storage device with Ethernet interface Both the Interface Select and Speed bytes are unsigned integers representing the network interface and network speed respectively The Speed integer is defined in Table 6 Table 6 Network Speed Integer Definition o fres gt 6 November 2014 Open Compute Project Storage Storage device with Ethernet interface 10 3 12 Get Device Network Speed Opcode 0x0a Type Get Parameter Byte 0 Interface Select Bytes Returned 0 Interface 1 2 Speeds Available 3 Current Speed Description Returns the network speed capabilities and current setting of the specified network interface on the attached storage device with Ethernet interface The Interface Select and Interface bytes are both unsigned integers which should match if the data is valid The Current Speed byte uses the same form detailed in Table 6 to indicate the currently selected speed Two bytes take the form of a bit field defined in Table 7 to represent the network Speeds Available Table 7 Network Speeds Available Bit Field ENE o has 10 3 13 Get Device Operating State Opcode 0x0b Type Get
5. Description Returns three bytes all unsigned integers The first byte returned is the major revision number the second is the minor revision number and the third is the sub minor This offers a method of determining the supported commands of a specific storage device with Ethernet interface 10 3 17 Disable External Loopback Opcode 0x0f Type Set Description This command explicitly disables the external loopback mode of the storage device with Ethernet interface Once disabled the storage device with Ethernet interface resumes normal network behavior This command is ignored if the loopback mode is disabled 10 3 18 Reset Device Opcode 0x10 Type Set Description This command MAY be used to request a soft reset of the storage device with Ethernet interface 10 3 19 Reset Network Interface Opcode 0x11 Type Set Parameter Byte 0 Interface Select 18 6 November 2014 Open Compute Project Storage Storage device with Ethernet interface Description This command MAY be used to reset the specified interface The interface is brought down and then brought back up restoring the saved configuration for that interface In the case where the interface is set for DHCP a fresh DHCP request will be made and for static configurations the configured IP address Netmask and Gateway will be reinstated The parameter for this command is a single byte unsigned integer the value determining the interface to reset Parameter values spec
6. device with Ethernet 6 November 2014 10 2 10 2 1 V FON gt HMP PAMS 10 2 3 10 2 4 Open Compute Project Storage Storage device with Ethernet interface interface and to communicate information about the device to the chassis The storage device with Ethernet interface is designed to behave as an I C Slave device at a device address of 0x2F There are two types of commands that the storage device with Ethernet interface responds to a Set Commands that send data to the storage device with Ethernet interface b Get Commands that return data from the storage device with Ethernet interface Command formats Set Command format byte Write Length byte Opcode byte Payload byte s if required Checksum byte Get Command format byte Dummy Write Length byte Opcode byte Payload byte s if required Checksum byte Delay Minimum of 100 microsecond Read Length byte Opcode byte Payload byte s Checksum byte Length An unsigned integer that indicates the number of bytes being sent in a specific transmission This number includes the length byte itself opcode payload and the checksum byte Opcode In the case of write transactions this byte indicates the operation requested For read transactions this is a validation byte that SHOULD match the operation that requested data be returned See section 10 3 for details on the assigned opcodes yty Y amp amp 6 vutroste 10 2 5 Payload
7. 02 oder 11 10o OR CO I SN NS as ce sete aca tc at pen vate eee sent ce eee 13 10 4 12C implementation requirements ccceseccccssscceceesecceeesececceeceeeeeeeceseuecessueceesenes 21 LAL EPO EE EEE ENE EE NE EEE EN 23 Open Compute Project Storage Storage device with Ethernet interface Le REVISION FINS EOUY ERE ETE EE 24 3 Figures Figure 1 Device Free Plug CONNECHOL ccccccceccceeecceeeceuceceeeecueeceueeseeeceueeseeeseusessueeseeeseaeens 7 Figure 2 2 5 hard disk drive with Ethernet interface plug connector rrrrrrrrnnrnarvarvarvnnrnerneenere 7 Figure 3 3 5 hard disk drive with Ethernet interface plug connector rrrrrrrrnarrarvarvarvnnrnerneenere 8 Figure 4 System Backplane Fixed Receptacle connector rrrrnrrrrnrrrrnrevnrrnrarernarennrrrnnnennnnn 8 4 Tables Table 1 Connector Signal ASSIGNMENTS cccccccceecceeceteseeseeeceuceceeeeseeeteueeseeseucetsueeseeetaneeseees 9 Table 2 Open I2C commands for the storage device with Ethernet interface 0 ccceeee 13 Table 3 Get Device IP Address Parameter Byte Format rrrannnnnnnnnnnnnnnennnnnvnnrnnnnennnnnnnnennnnennn 15 Table 4 Get IP Address Status Byte Format ccccccccceccceececeeeeeeeeteeeeseeeteeeseeeeeueeteneeseeeeans 15 Table 5 Get IP Address Returned Bytes Format ccccccseccceeeceeeeceeecceeeceuseseeesaueeseusenseesaes 16 Table 6 Network Speed Integer Definition ccccccccccceccce
8. andards and specifications contain provisions that by reference in the text constitute provisions of this specification FC bus specification and user manual Rev 5 9 October 2012 Serial GMII Specification RFC 2119 RFC Key Words SFF 8201 2 5 Drive Form Factor Drive Dimensions SFF 8301 3 5 Drive Form Factor Drive Dimendions SFF 8223 2 5 Drive Form Factor with Serial Connector SFF 8323 3 5 Drive Form Factor with Serial Connector SFF 8482 Serial Attachment 2X Unshielded Connector SFF 8680 Serial Attachment 12 Gb s 2X Unshielded Connector SFF 9639 Multifunction 12 Gb s 6X Unshielded Connector Pinouts 7 Definitions symbols abbreviations key words 7 1 Definitions 7 2 Symbols and abbreviations Abbreviation Meaning GPIO general purpose input output IFC Inter Integrated Circuit mA milliampere i e 10 3 amperes RX Receiver TX Transmitter V Volt 7 3 Key words The key words MUST MUST NOT REQUIRED SHALL SHALL NOT SHOULD SHOULD NOT RECOMMENDED MAY and OPTIONAL in this document are to be interpreted as described in RFC 2119 MAY This word or the adjective OPTIONAL mean that an item is truly optional One vendor may choose to include the item because a particular marketplace requires it or because the vendor feels that it enhances the product while another vendor may omit the same item An implementation which does not include a particular option MUST be prepared to interoperate wit
9. ceceeeseeeseeeseeeseeeseeeseeeseeeseeseeeseeses 16 Table 7 Network Speeds Available Bit Field ccc cccccccceccceeeceeeseeseeeseeeseeeseeeseeeseeeseeesaeeses 17 Table 8 Get Device Operating State Bit Description rrrarnnrrnarernnrerarerranennnnnranennanennennanenner 17 Table 9 Get Write Status Info Byte Definition rrrarrrrnrennnrrrarernarernnrnranennnnernnnnnanennaneranennanennn 18 Table 10 Set Device IP Address Config Byte Format rrrarnnranennanennnnnnanennnnennnnnranennnnenanennanennn 19 Table 11 Set Device IP Address Parameter Bytes Format rrrrnnnnnnnnnnrnnnrnnnrnnnrnnnnnnnnnnannnannnn 20 Table 12 Get Interface Link State Returned Bytes Format rrrnnnnnnnnnnanennnnrvnnrnrnnennnnnvnnrnnnnennn 21 Table 13 Get Data Protocol Version Protocol Enumeration cccccccsecccecececeseeeeeeeeeeeseeeees 21 http opencomputeorg 8 d e Overview Description The storage device with Ethernet interface provides a common configuration for the implementation of the Ethernet interface on a storage device It is intended to support large configurations of storage devices in data center applications Other applications may find the features of this device advantageous where communication to the device through the Ethernet interface is desired Some example implementations are documented in lt Reference to the white paper gt License As of December 20 2013 the following persons or entiti
10. es have made this Specification available under the Open Web Foundation Final Specification Agreement OWFa 1 0 which is available at http www openwebfoundation org legal the owf 1 0 agreements owfa 1 0 Seagate Technology LLC You can review the signed copies of the Open Web Foundation Agreement Version 1 0 for this Specification at http opencompute org licensing which may also include additional parties to those listed above Your use of this Specification may be subject to other third party rights THIS SPEGIFICATION IS PROVIDED AS IS The contributors expressly disclaim any warranties express implied or otherwise including implied warranties of merchantability non infringement fitness for a particular purpose or title related to the Specification The entire risk as to implementing or otherwise using the Specification is assumed by the Specification implementer and user INNO EVENT WILL ANY PARTY BE LIABLE TO ANY OTHER PARTY FOR LOST PROFITS OR ANY FORM OF INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY CHARACTER FROM ANY CAUSES OF ACTION OF ANY KIND WITH RESPECT TO THIS SPECIFICATION OR ITS GOVERNING AGREEMENT WHETHER BASED ON BREACH OF CONTRACT TORT INCLUDING NEGLIGENCE OR OTHERWISE AND WHETHER OR NOT THE OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE 6 November 2014 Open Compute Project Storage Storage device with Ethernet interface 6 Normative references Referenced st
11. ese words and terms are defined either in the glossary or in the text where they first appear Lists sequenced by lowercase or uppercase letters show no ordering relationship between the listed items Lists sequenced by numbers show an ordering relationship between the listed items If a conflict arises between text tables or figures the order of precedence to resolve the conflicts is text then tables and finally figures Not all tables or figures are fully described in the text Tables show data format and values Notes and examples do not constitute any requirements for implementers and notes are numbered consecutively throughout this specification 8 Mechanical characteristics 8 1 Device and system connectors 8 1 1 Storage device connector The storage device with Ethernet interface plug connector is the Device Free Plug connector defined in SFF 8482 and SFF 8680 See the SFF specifications for detailed dimensional requirements Figure 1 illustrates the interface plug connector 6 6 November 2014 Open Compute Project Storage Storage device with Ethernet interface Figure 1 Device Free Plug connector 8 1 2 Device form factor and connector location The storage device with Ethernet interface form factor SHALL comply with SFF 8201 or SFF 8301 2 5 and 3 5 drive form factors respectively See SFF 8223 and SFF 8323 for the storage device with Ethernet interface plug connector locations on 2 5 and 3 5 d
12. h another implementation which does include the option though perhaps with reduced functionality In the same vein an implementation which does include a particular option MUST be prepared to interoperate with another implementation which does not include the option except of course for the feature the option provides MUST This word or the terms REQUIRED or SHALL mean that the definition is an absolute requirement of the specification MUST NOT This phrase or the phrase SHALL NOT mean that the definition is an absolute prohibition of the specification http opencomputeorg 5 SHOULD This word or the adjective RECOMMENDED mean that there may exist valid reasons in particular circumstances to ignore a particular item but the full implications must be understood and carefully weighed before choosing a different course SHOULD NOT This phrase or the phrase NOT RECOMMENDED mean that there may exist valid reasons in particular circumstances when the particular behavior is acceptable or even useful but the full implications should be understood and the case carefully weighed before implementing any behavior described with this label VENDOR SPECIFIC Something e g a bit field code value that is not defined by this specification and MAY be used differently in various implementations 7 4 Editorial conventions Certain words and terms used in this specification have a specific meaning beyond the normal English meaning Th
13. he commands are split into two ranges 0x00 0x7f are reserved for Open Commands 0x80 Oxff are reserved for Vendor Specific Commands This section defines Open Commands Table 2 Open I2C commands for the storage device with Ethernet interface http opencompute org Opcode Name Extended command set 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 Ox0a OxOb OxOc Ox0d Ox0e OxOf 0x10 Ox11 0x12 0x13 0x14 0x15 0x16 13 10 3 2 10 3 3 10 3 4 10 3 5 10 3 6 10 3 7 10 3 8 14 Extended command set Opcode 0x00 Description This opcode is reserved for the future implementation of an extended command set Get Extended Status Opcode 0x01 Type Get Bytes Returned 0 31 Extended Status Description Returns a value 32 bytes in length The format of the returned value is vendor specific This command SHOULD be used when the value returned by Device Operating State command indicates that Extended Status is available Get Manufacturer Opcode 0x02 Type Get Bytes Returned 0 15 Manufacturer Description Returns a 16 byte ASCII string indicating the manufacturer of the storage device with Ethernet interface Get Product ID Opcode 0x03 Type Get Bytes Returned 0 15 Model Number Description Returns a 16 byte ASCII string indicating the model number of the storage device with Ethernet interface Set Device Present Opcode 0x04 T
14. ifying interfaces that do not exist on the storage device with Ethernet interface cause the command to be ignored 10 3 20 Set Device IP Address Opcode 0x12 Type Set Parameter Bytes 0 Interface Select 1 Config 2 18 Address Description This command MAY be used to set the IP address of the specified network interface on the storage device with Ethernet interface Byte 0 detailed in Table 10 isa bit field used to specify a protocol version an assignment type set a gateway address and provides a means to clear previous settings The Clear Settings bit if set will remove all currently set configuration options for the specified interface shutting off that interface If the Clear Settings bit is not set the command will modify the existing configuration only changing the specified interface and IP version settings i e Setting a static IPv4 address on eth1 will not change ethO s configuration or the IPv6 configuration on eth1 The Set Gateway bit if set allows a static gateway to be specified if the Assignment Type bit is also set When specifying a gateway address an IPv4 address should be located in address bytes 1 4 and IPv6 gateways should be located in address bytes 1 16 The Interface Select byte is a unsigned integer used to specify the interface desired There are 17 address parameter bytes in the case of Clear Settings being set a DHCP configuration being set setting a gateway address or an IPv4 static address being
15. ned 8 bit integers and 1 16 bit unsigned integer The first byte returned is the major revision number the second is the minor the third is the sub minor and the remaining two bytes are an integer code used to indicate the specific protocol used by the storage device with Ethernet interface Table 13 defines the Protocol integer Table 13 Get Data Protocol Version Protocol Enumeration Value oo fe I2C implementation requirements IC signals See 9 2 Clock stretching Host devices need to support clock stretching It is expected that storage device with Ethernet interface make use of clock stretching Failure to properly handle clock stretching MAY lead to corrupt transactions due to a loss of synchronization between the Master and Slave http opencompute org 21 10 4 3 Power down isolation A storage device with Ethernet interface in the powered down state SHOULD NOT interfere with the 1 C communication between the host and other devices Some C controllers MAY require additional circuitry to isolate the IFC clock and data signals so the storage device with Ethernet interface does not load the bus when the storage device with Ethernet interface not powered This is an issue that needs to be addressed by the storage device with Ethernet interface 22 6 November 2014 Open Compute Project Storage Storage device with Ethernet interface 11 FAQ Q Is there any software needed Driver s etc A The storage device
16. nterface if an invalid interface is selected the code will be all zeroes 10 3 22 Get Interface Link State Opcode 0x14 20 Type Get Parameter Byte 0 Interface Select Bytes Returned 0 Interface 1 Status Description This command returns the link state of the specified network interface on the storage device with Ethernet interface The Interface Select and Interface bytes are both unsigned integers indicating the network interface and the Status byte is defined in Table 12 6 November 2014 Open Compute Project Storage Storage device with Ethernet interface Table 12 Get Interface Link State Returned Bytes Format Bye en setting o 0 7 mterace unsigned integer Reserved I Reserved Link 0 Down 1 Up 10 3 23 Get Firmware Version Opcode 0x15 Type Get Bytes Returned 0 Major Revision Number 1 Minor Revision Number 2 Sub minor Revision Number Description This command returns three bytes all unsigned integers indicating the version of firmware currently installed upon the storage device with Ethernet interface The first byte returned is the major revision number the second is the minor and the third is the sub minor 10 3 24 Get Data Protocol Version Opcode 0x16 10 4 10 4 1 10 4 2 Type Get Bytes Returned 0 Major Revision Number 1 Minor Revision Number 2 Sub minor Revision Number 3 4 Protocol Description This command returns 5 bytes 3 unsig
17. orage device with Ethernet interface is a slave device and lacks internal pull up resistors These resistors are omitted to allow the greatest flexibility when implementing shared bus The host device SHOULD include pull up resistors that meet the guidelines of the I C specification The IC specification and user manual may be obtained at www nxp com documents user manual UM10204 pdf 5V and 12V The storage device with Ethernet interface MAY require 5V 12V or both 5V and 12V See the device product data sheet for specific voltage and power requirements PRESENCE DETECT P1 The P1 signal is a bidirectional signal that MAY be used to assign unique device addresses and or to detect the removal of a storage device from the chassis The use of this signal requires the host to pull up the signal to 3 3V The pull up resistor SHOULD result in a sink current of less than or equal to 8 mA VENDOR SPECIFIC P11 Application of P11 is VENDOR SPECIFIC This pin MAY be not connected or the device MAY connect a GPIO with the following electrical characteristic limits Maximum voltage applied to device by chassis 3 6 V Minimum device sink current capability 8 mA Ethernet storage device I C communication Overview The 1 C interface provides a means of communication between the chassis and the storage device with Ethernet interface independent of the Ethernet interface The IC interface is used to configure operating elements of the storage
18. ress parameter is ignored 10 3 10 Get Device IP Address Opcode 0x08 Type Get Parameter Bytes 0 Interface Select 1 Address Select Bytes Returned 0 Interface 1 Status 2 18 Address Description Returns the IP address and netmask or gateway address as specified in the parameter bytes of the attached storage device with Ethernet interface The Interface Select and Interface bytes are both unsigned integers indicating a specific network interface The octets and hextets are numbered from left to right in increasing order Hextet is used in this context to indicate a 16 bit word Table 3 Get Device IP Address Parameter Byte Format o 1 070 Interface Select Unsigned Integer IP Version 0 IPv4 1 IPv6 4 o Get Gateway 0 No 1 Yes Table 4 Get IP Address Status Byte Format a Interface Configured 0 No 1 Yes 4 3 Static Configuration Set 0 No 1 Yes 2 DHCP Configuration Set 0 No 1 Yes 1 IP Version 0 IPv4 1 IPv6 Get Gateway 0 No 1 Yes http opencompute org 15 10 3 11 16 Interface Unsigned Integer IPv6 Hextet 1 H IPv4 Octet 3 IPv6 Hextet 2 H H IPv4 Netmask Octet 1 IPv6 Hextet 3 H Jest IPV6 Hextet 4 H 40 flvsHentse 42 fremmes Er 7 1 1 1 1 PG Hextet 8 IPv6 Netmask Set Device Network Speed Opcode 0x09 Type Set Parameter Bytes 0 Interface Select 1 Speed Description eth0
19. rive form factors respectively These SFF specifications define the location of the connector relative to the device side mounting holes and the device bottom mounting holes as applicable Figure 2 illustrates the connector on a 2 5 hard disk drive The connector location on the storage device with Ethernet interface SHALL comply with the applicable SFF specification Figure 2 2 5 hard disk drive with Ethernet interface plug connector Figure 3 illustrates the connector on a 3 5 hard disk drive http opencomputeorg i s lt i s s sSS 07 77 Bea rette wk La gt eas sf AX e ay OPEN te ayn S pre Avril Compute Project e t E OCR tar Figure 3 3 5 hard disk drive with Ethernet interface plug connector 8 1 3 System connector The system backplane receptacle connector is the Backplane Fixed Receptacle connector defined in SFF 8482 and SFF 8680 The backplane receptacle connector defined by SFF 8639 MAY also be used Figure 4 illustrates the SFF 8482 SFF 8680 system Fixed Receptacle connector Figure 4 System Backplane Fixed Receptacle connector 8 1 4 Connector pin assignment Table 1 defines the system and device connector pin signal assignments The storage device with Ethernet interface SHALL comply with this pin assignment Other interfaces use common form factors and connectors that MAY physically mate with the device or system connector used 8 6 November 2014 Open Comp
20. set the unused address bytes should be zero filled Once modifications to an interface s IP configuration are complete the interface must be reset for the new configuration to become active An overview of the Parameter bytes can be found in Table 11 Table 10 Set Device IP Address Config Byte Format 3 Clear Settings 0 Modify 1 Clear 2 Assignment Type 0 DHCP 1 Static 1 IP Version 0 IPv4 1 IPv6 Set Gateway 0 No 1 Yes http opencompute org 19 10 3 21 Description eth0 Description eth1 Interface Unsigned 1 Status Byte see Table Integer 4 2 IPv4 Octet 1 3 IPv4 Octet 2 IPV6 Hextet 1 H IPV6 Hextet 1 L 4 IPv4 Octet 3 5 IPv4 Octet 4 IPv6 Hextet 2 H IPv6 Hextet 2 L IPv4 Netmask Octet 1 7 IPv4 Netmask Octet 2 IPv6 Hextet 3 H IPv6 Hextet 3 L IPv4 Netmask Octet 3 IPv4 Netmask Octet 4 IPv6 Hextet 4 H IPv6 Hextet 4 L rm PE 12 IPV6 Hextet 6 H IPV6 Hextet 6 L 14 IPV6 Hextet 7 H IPV6 Hextet 7 L mett 16 IPv6 Hextet 8 H IPv6 Netmask Get Device Network MAC Opcode 0x13 Type Get Parameter Byte 0 Interface Select Bytes Returned 0 Interface 1 6 MAC Description This command returns the MAC of the specified network interface on the storage device with Ethernet interface The Interface Select and Interface bytes are unsigned integers indicating the network interface The MAC bytes contain the 48 bit code specific to the selected i
21. ute Project Storage Storage device with Ethernet interface in the storage device with Ethernet interface See SFF 9639 for a list of these interfaces and pin signal assignments 10 j D h O O e md D O h O Q D Q V Q e 3 D a IN O A W N Signal S S11 S12 S13 514 P15 See 9 1 for TX and RX electrical characteristics See 9 2 for l C electrical characteristics 1 1 Power U U o o VU U uv l U U T RRR BBa ess See 9 3 for 5V and 12V requirements See 9 4 for P1 and P11 electrical characteristics http opencompute org g 9 2 9 3 9 4 9 5 10 10 1 10 Electrical characteristics TX and RX signals The TX and RX signals SHALL meet the requirements defined by the Serial GMII Specification This specification may be obtained at ftp ftp eng cisco com smii sqmii pdf IC signals The 1 C signals are OPTIONAL however a storage device with Ethernet interface that supports multiple soeeds provides maximum performance if the Device Network Speed see 10 3 11 is set through the I8C interface A storage device with Ethernet interface that supports multiple speeds defaults to 1 Gbps Ethernet speed providing backwards compatibility with single speed devices If implemented the I C signals SHALL comply with the C bus specification and user manual at Vpp of 3 3V and operation at the standard mode speed of 100 kHz The st
22. with Ethernet interface uses standard Ethernet communication protocols Q Is there a physical keying mechanism to prevent insertion of the storage device with Ethernet interface in a SAS SATA slot or vice versa If not can this cause damage to the system A There is no physical keying mechanism to distinguish between different drive types Signal locations and protocol prevent damage to the system and the device Q How are the drives presented on the network A Each drive has two IP addresses For additional FAQ regarding the Storage device with Ethernet interface refer to wiki FAQ https developers seagate com display KV FAQ http opencompute org 23 12 24 Revision History 1 12 20 2013 Alvin Cox Initial Public Version Asghar Riahi 10 2014 Alvin Cox Updates to address initial feedback md pe Riahi from the Incubation Committee 08 21 2014 Alvin Cox Added the following sections IC es Asghar Riani RAQS apd revision Son us Bryan Wyatt and tables lists oe Alvin Cox Added several new IFC Commands Asghar Riahi updated some existing 1 C commands Bryan Wyatt 6 November 2014
23. ype Set Description This command facilitates the detection of a device being removed from the system In its default state the PRESENCE DETECT signal on pin P1 of the connector is high If the command is sent to an attached storage device with Ethernet interface then the storage device with Ethernet interface drives the PRESENCE DETECT signal low on pin P1 of the connector signal low until it is physically removed powered down or the device is reset Identify Device Opcode 0x05 Type Get Bytes Returned 0 7 WWN Description Returns the 64 bit Worldwide Name of the storage device with Ethernet interface Get Device Temperature Opcode 0x06 Type Get Byte Returned 0 Degrees Celsius 6 November 2014 Open Compute Project Storage Storage device with Ethernet interface Description Returns a single byte signed integer 2 s complement indicating the storage device with Ethernet interface temperature in degrees Celsius 10 3 9 Set Device I C Address Opcode 0x07 Type Set Parameter Byte 0 Address Description In the case where multiple storage devices with Ethernet interface are attached to the same 1 C bus this mechanism allows the default 7 bit address of Ox2f to be changed to a unique value In addition the storage device with Ethernet interface is set to the Present state This command is only acted upon if the PRESENCE DETECT signal is driven low by the host Since 7 bit addressing is used the MSB of the add
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