LSI LSISAS3801X 8 Port SAS Controller - 2 x SFF-8088 SAS 300
Contents
1. LSI HBAs are offered in 8 and 4 port internal connectivity options as kits and single packs Adaptec sells a 4 port internal adapter as a kit or single pack in the 2 Series although it does not have the performance bandwidth of a higher ported option Cache for RAID 0 1 10 Why Adaptec differentiates its 2 Series adapters against LSI Host Bus Adapters and the LSI MegaRAID entry line with a 128MB on board cache This expensive piece of memory may modestly improve performance but it puts the data it contains at risk without a battery back up BBU On board cache without a BBU and without support for RAID 5 provides no tangible advantages over LSI MegaRAID entry line products Cache is most beneficial if running RAID 1 and 10 on small block random applications transactional database OLTP etc however these are the least likely applications for these adapters LSI SAS HBAs do not rely on cache because they leverage advanced Fusion MPT architecture which provides over 140 000 I Os per second This superior ultra thin driver architecture delivers high performance without the extra expense of cache In addition LSI HBAs are built with precisely selected high density chips that are low cost and power effective providing a reliable solution for your server Hardware RAID or Host Based Software RAID As Adaptec correctly cites Host Based RAID 5 does place a burden on the main CPU and is a cost trade off LSI chooses to let the2. customer make If your CPU does not have extra cycles available then the MegaRAID entry line with Host Based RAID is not for you However with today s high performance CPUs this is not a consideration for many and Host Based RAID is perfectly acceptable In fact modern multi core CPUs are utilized at only a fraction of power they can deliver The LSI MegaRAID entry line adapters utilize 1 4 of the power in one core Conversely both Adaptec RAID and LSI HBAs with Integrated RAID are very similar in that they are both Hardware RAID with the computations taking place on the embedded CPU on the storage adapter Adaptec RAID in the 2 Series offers RAID 0 striping 1 mirroring and 10 striping and mirroring LSI Integrated RAID includes RAID 0 1 and 1E enhanced mirroring where each disk is logically divided by half and the mirrored data is written to the adjacent disk Conclusion Whether requiring low cost RAID 5 scalability or simply mirroring for large SATA drives LSI has the product breadth to service your specific requirements with either a LSI SAS SATA Host Bus Adapter or a MegaRAID entry line storage adapter Low Cost SAS SATA PCI Express Adapters 2 Low Cost SAS SATA PCI Express Adapters Features Hardware or Host Based Software RAID Technology RAID Form Factor JBOD RAID 0 RAID 1 RAID 1E RAID 10 RAID 5 Bootable Array Support Cache Host CPU Utilization Physical Device Support Supports SAS an
3. main CPU bandwidth by RAID functions is not a concern e RAID 5 is needed or might be in the near future e Protection needed against hard drive loss but not for server failure e Require low cost solution for both SAS and SATA hard drives e Need the ability to manage both entry level and more feature rich RAID adapters using a single management utility When to choose LSI SAS Host Bus Adapters e External connectivity required that is scalable for JBODs tape e Internal connectivity required with RAID 0 1 and 1E e Interoperability with SAS expanders is a key concern e Need an embedded CPU in ASIC to perform RAID operations to offload system CPU e You desire a proven solution LSI is a market leader in SAS HBAs and was first to market in 2006 e Desire lowest cost for robust solution e Performance is a priority Fusion MPT Architecture provides over 140 000 I Os per second MegaRAID 8204ELP left and LSI SAS3801E right For more information and sales office locations please visit the LSI web sites at Isi com Isi com contacts North American Headquarters LSI Europe Ltd LSI KK Headquarters Milpitas CA European Headquarters Tokyo Japan T 1 866 574 5741 within U S United Kingdom Tel 81 3 5463 7824 T 1 408 954 3108 outside U S T 44 1344 413200 LSI the LSI logo design Fusion MPT and MegaRAID are trademarks or registered trademarks of LSI Corporation All other brand and product al names may be trademarks of
4. their respective companies L S oy LSI Corporation reserves the right to make changes to any products and services herein at any time without notice LSI does not assume any responsibility or liability arising out of the application or use of any product or service described herein except as expressly agreed to in writing by LSI nor does the purchase lease or use of a product or service from LSI convey a license under any patent rights copyrights trademark rights or any other of the intellectual property rights of LSI or of third parties Copyright 2008 by LSI Corporation All rights reserved 0608
5. White Paper Naw LsIs Low Cost SAS SATA PCI Express Storage Adapters A Comparison of LSI Host Bus Adapters the LSI MegaRAID Entry Line and the Adaptec 2 Series There are many choices of SAS SATA and SATA storage adapters offered in the market today In this paper we will focus on differentiating the various low cost adapters available LSI offers the most complete line of adapters spanning all key RAID levels and connector configurations and is a leader in the SAS SATA Host Bus Adapter marketplace Recently Adaptec released their 2 Series SAS SATA Hardware RAID adapters and compared them to the LSI MegaRAID Entry Line which actually employs Host Based RAID technology In doing so they fail to discuss the strengths of host based RAID technology Sometimes called Software RAID and also fail to mention the LSI Host Bus Adapter HBA products altogether which are Hardware RAID like the Adaptec 2 Series As a proven solution LSI HBAs deliver the performance availability and connectivity options that customers desire at an optimal price point and should be considered as an alternative the Adaptec 2 Series In order to better understand how these three product lines stack up against each other we will now compare LSI Host Bus Adapters the LSI MegaRAID Entry Line and the Adaptec 2 Series Scalability If you plan to employ JBODs Just a Bunch Of Disks or external SAS RAID enclosures RBODs the main considerations for a st
6. d SATA drives Hot Spare Support Hot Swap Capability Native Command Queuing NCQ Low Power Consumption Environmentally Friendly less parts to manufacture and ship 24 7 Worldwide Customer Support Warranty 8 Port Internal MSRP 8 Port External MSRP 4 Port Internal 4 Port External MSRP 4 Port Internal MSRP 4 Port External MSRP Total Low cost PCle SAS SATA options LSI Host Bus Adapters Hardware RAID SAS SATA Integrated RAID Low profile MD2 Yes Yes Yes Yes No No Yes Low Up to 122 Yes Yes Yes Yes Yes Yes Yes 3 Years LSI SAS3081E R Single 239 Kit 349 LSI SAS3801E Single 365 LSI SAS3442E R Single 269 Kit 385 LSI SAS3041E R Single 175 Kit 255 LSI SAS3442E R Single 269 Kit 385 7 Adaptec 2 Series Hardware RAID SAS SATA Adaptec RAID Low profile MD2 Yes Yes Yes No Yes No Yes 128 MB Low Up to 128 Yes Yes Yes Yes No No No 3 Years Adaptec RAID 2405 Single 225 Kit 250 Adaptec RAID 2045 Single 250 3 LSI MegaRAID Entry Line Host Based RAID SAS SATA MegaRAID Low profile MD2 No Yes Yes No Yes Yes No Medium Up to 8 Yes Yes nes Yes Yes Yes Yes 3 Years LSI MegaRAID SAS 8208ELP Kit 315 LSI MegaRAID SAS 8204ELP Kit 229 Low Cost SAS SATA PCI Express Adapters 3 Choosing the Right Low Cost SAS SATA Adapter For You When to choose the LSI MegaRAID SAS Entry Line e Consumption of
7. orage adapter are the number of physical devices supported and interoperability with the SAS expander Both LSI HBAs and the Adaptec 2 Series support at least 122 physical devices JBOD mode and utilize Hardware RAID technology In addition to scalability LSI is the market leader in both SAS HBAs and SAS expanders These expanders are built to work with LSI SAS SATA Host Bus Adapters thus removing the inevitable interoperability road blocks that are associated with utilizing separate vendors in one storage system The MegaRAID entry line should be considered only if scalability is not a necessity in your environment as these adapters do not support JBOD mode or more than eight physical devices MegaRAID SAS 8208ELP MegaRAID SAS 8204ELP LSI SAS3801E LSI SAS3081E R LSI SAS3442E R LSI SAS3041E R Direct connectivity If your solution requires direct connectivity to hard disk drives inside the server then Host Based or Software RAID is a viable option Not only do the Host Based MegaRAID entry line adapters have high performance but they are also built on the proven OEM tested MegaRAID stack They ship with RAID 0 1 10 and 5 striping with distributed parity to deliver higher performance with fewer disks The MegaRAID SAS 8208ELP with 8 internal ports and the MegaRAID SAS 8204ELP with 4 internal ports are the only low cost RAID 5 options available today the Adaptec 2 series does not support RAID 5
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