DS-2250J User Manual
Contents
1. 3 A1 A5 Access Blue Flash RAID10 pen rebuilding Blue amp Red Flash rebuilding Blue amp Red Flash RAID5 rebuilding Blue amp Red Flash Clone 2 DIP Switch and RAID Mode cross reference User can configure any RAID mode as below by DIP switch setting and apply the change by pressing the Change Mode Switch DIP Switch Setting Table 5 ala Medes DIP Switche RAID 0 Strip JBOD Large Normal Single Note When DIP Switch is set to RAID 10 If you installed two HDD only it is with RAID 1 mode If you installed four HDD then it is RAID 10 mode 2 1 RAID 0 for High Performance RAID O or Stripe is the segmentation of logically sequential data such as a single file so that Model DS 2250J segments can be assigned to multiple hard disks in a round robin fashion and thus written concurrently If any one hard disk gets defective information stored in this RAID 0 mode will be invalid RAID 0 Disk 0 Disk 1 2 2 RAID 1 Mirror for High Security RAID 1 or Mirror is the replication of data onto separate hard disks in real time to ensure continuous availability Take a RAID 1 system with two hard disks as an example data in a hard disk will be exactly the same as the data in another hard disk Failure in a hard disk Host controller still could read write data Users have to replace the defective hard disk The device enclosure will enter identical rebuild mode automati2. Model DS 2250J Venus T5 mini 2 5 SATA RAID User Manual 3 7 D ee www amselectronics com Model DS 2250J Contents Mi FO81IQr69 iu u uuu ea a aaa E Eaa a aaa aaa aa aaa aaa 3 2 DIP Switch and RAID Mode cross reference 5 2 1 RAID 0 TOF High Performance LL aaa aaa aaraa Anaa 7 2 2 RAID 1 Mirror fof MoN S EC Urilyu u uuu u u uuu u usu us 7 2 3 Stripe Mirror RAID 10 for High Performance and High Securily 7 IC Oil ua E ENE OAA 8 2 9 JBOD GCorlieale aliig uyu u u u uuu a s uuu an 8 2 0 Parity PrOIeCGIKRuu uy 2 saa a 9 2 7 NOFMal Mod SInQ16 u uu u uuu uuu u uu uuu uuu uu u uu uuu suwa atus has 9 Model DS 2250J Features All Aluminum design Plug amp play hot swappable Support Windows Mac amp Linux Built in DIP Switch RAID mode setting LED indicators for AC Power HDD Error HDD Access Double Security handle lock Port Multiplier support up to 5 x 2 5 SATA HDD Built in JMB393 Hardware RAID controller Transfer rate SATA 1 5Gb s SATA 3Gb s 5 X 5 cm FAN X1 super air ventilation Buzzer Alarm for overheating Color Black 20W AC 100 240V 50 60Hz Dim 5 5 L X 3 1 W X 4 9 H inches Weight 1 35 Ibs enclosure only Figure 1 Figure 2 Model DS 2250J Front Panel See Figure 3 Figure 3 Front Panel Description A1 A5 Fr
3. cally RAID 1 Disk 0 Disk 1 2 3 Stripe Mirror RAID 10 for High Performance and High Security The Raid Enclosure could be configured to support Stripe and Mirror at the same time i e RAID 10 Take four hard drives RAID 10 as an example hard drive 0 and hard drive 1 could act as Mirror 1 and hard drive 2 and hard drive 3 could act as Mirror 1 too Then the Raid Enclosure configures these two Mirrors as Stripe Model DS 2250J RAID 10 RAID 0 RAID 1 RAID 1 Beee EEEL EEERL EBERL 2 4 Clone This mode is useful especially when users would like to copy data from a hard drive to several hard drives at the same time Clone s action is similar to RAID 1 However all of the hard disks will be the mirrors For example in a four hard drives Clone environment data in each hard drive will be the same Disk 0 Disk 1 Disk 2 Disk 3 2 5 JBOD Concatenating This mode is also named Concatenating In this mode the Raid Enclosure will concatenate all of the hard drives into a single hard drive with larger capacity For example if three 1TB hard disks are connected to the Raid Enclosure in concatenating mode user will get a single hard disk with capacity of 3 TB capacity Disk 0 Disk 1 Disk 2 2 6 Parity Protection Model DS 2250J XOR engine in the Raid Enclosure generates parity block In RAID 3 mode Parity Block will be stored in the same hard drive While in RAID 5 mode Parity Block will be spread over all of
4. ont panel Push Open Button a Function Push forward to open the front HDD front panel b LED Indication See LED Status description on page 5 amp 6 A 6 Power System LED Power on gt Solid blue Power off gt No indication A7 Mechanical lock To Open or Lock the front panels Note When push It to un lock position you can open the front panels by pressing the push Open button While it is in the lock position the 5 front panels are locked and cannot be open when you press the push open button Note Do not try to press down the push open button while it is locked Any inappropriate use of it may cause the damage of the mechanical lock A8 Front Panel Rear View See Figure 4 LED Status Figure 4 Model DS 2250J Rear Parts Description B1 Power Input 5V 4A B2 E SATA port B3 Raid Setting DIP Switch 7 Raid Mode Raid 0 10 3 5 JBOD Single Clone B4 Reset Device Change Mode Button 1 Reset Device Press it less than 2 seconds 2 Change Mode Press it over 2 seconds B5 Buzzer Disable Button Power Switch Button 1 Buzzer disable Press it less than 2 seconds 2 Power Switch Press it over than 2 seconds B6 Air ventilation holes Ne Hard Drive Access Blue Power System LED Indicator see figure 3 A6 Light On Power starting Light On System is ready Light Off Power is OFF Model DS 2250J Raid Status LED Indicator see figure
5. the different hard drives fil ry Disk 0 Disk 1 Disk 2 Disk3 Disk 0 Disk 1 Disk 2 Disk 3 The Raid Enclosure will also make use of same size disk space in each hard disk under RAID 3 or RAID 5 condition In RAID 3 or 5 modes failure in a hard disk will cause the RAID Enclosure to enter degraded mode Host controller still could read write data through the Raid Enclosure normally without knowing any defects Users have to replace the defective hard disk The Raid Enclosure then will enter identical rebuild mode automatically 2 7 Normal Mode Single Normal mode means all of the configured hard drives exist and the Raid Enclosure is not in rebuild condition Users can see the original hard drives from the host which supports port multiplier technology Note If the host controller does not support Port Multiplier function only one hard drive on the operating system will be detected The RAID tool is useful in this case
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