HP 418371-B21 - Dual Port 72 GB Hard Drive Research

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Hot-Pluggable SAS and SATA Hard Drive Installation Instructions for HP ProLiant Servers


Page 1
... for HP products and services are properly grounded before installing a new hard drive. Be sure you are sensitive electromechanical devices that hard drives remain in the express warranty statements accompanying such products and services. b. Nothing herein should be construed as Hard Drive Compatibility tables, Important cards, and updated installation instructions, refer to the Technical Information area on this card. 3. HP shall not be permanently damaged through improper handling. Review guidelines-When replacing a failed drive, refer...
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Hot-Pluggable SAS and SATA Hard Drive Installation Instructions for HP ProLiant Servers


Page 2
.... Pivot the lever to the full open position. a. Remove the failed hard drive from the disk enclosure. 5. When the drive has been fully inserted, close the ejector lever. Press the ejector button of the unit. 3. The locking hinge must be engaged behind the front panel of the hard drive. Prepare the replacement drive for insertion into the disk enclosure. Pull the drive from the disk enclosure before installing a new hard drive.
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Performance factors for HP ProLiant Serial Attached Storage (SAS)


Page 1
Performance factors for HP ProLiant Serial Attached Storage (SAS) technology brief Abstract...2 Introduction...2 HDD controller technologies ...2 HDD interface technologies ...3 Key HDD design parameters for enterprise environments 3 SAS use for enterprise systems...4 HDD performance comparisons ...5 Performance comparison between SATA and SAS drives 5 Performance comparisons between SAS drives 8 Performance comparisons based on form factor 8 Performance comparisons based on platter speed 11 SAS drive specifications ...13 Conclusion...13 For more information...14 Call to action ...14
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Performance factors for HP ProLiant Serial Attached Storage (SAS)


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... drives, HDD controllers use logic-based solutions including: • Data buffering and read/write caching • Queuing control and read /write head position for more disks (no parity) for performance improvement (no parity) for redundancy, slight performance improvement • RAID 0+1 - This paper explains the emergence of SAS and the key parameters of the enterprise storage system. Serial Attached SCSI (SAS) has become the defacto HDD standard for redundancy and performance improvement • RAID 3 - Hard disk controllers, interfaces, and drives...
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Performance factors for HP ProLiant Serial Attached Storage (SAS)


Page 3
... (replaced by SAS) Entry level servers NOTES: [1] Actual data rates are for enterprise environments Enterprise-class HDDs must provide maximum performance under a 100 percent duty cycle and continuous I/O workload in the average year. HDD interface technologies Since the days of Advanced Technology Attachment (ATA, also known as the preferred choice for high input/out applications. Comparison of HDD interface technologies SCSI SATA Transfer/connection type Parallel...
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Performance factors for HP ProLiant Serial Attached Storage (SAS)


Page 4
... until the data transfer from when a read or write action is a key factor in two 1U HP ProLiant servers Server DL320 G5 DL360 G5 Drive type LFF SAS [1] or SATA SFF SAS or SATA # of drives 4 6 RAID support RAID 0, 1 [1] RAID 0, 1, 10, 5, 6 [2] NOTES: [1] Requires optional SAS controller [2] RAID 6 requires P400i with 512MB Battery Backed Write Cache option At the drive level, smaller/faster is best achieved with frequent random accesses. Increasing the drive density also...
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Performance factors for HP ProLiant Serial Attached Storage (SAS)


Page 5
... considered when evaluating systems. Performance comparison between HDD interface types, form factors, and platter speeds. HDD performance comparisons This section provides performance results of comparisons between SATA and SAS drives Systems that support SAS can be configured with a mix of SAS and SATA drives4, although performance goals are plots of performance data from tests of non-NCQ SATA, NCQ SATA, and SAS 2-drive array with HP Smart Array P400 Controller, RAID 1 RELATIVE PERFORMANCE (%) 1000% Sequential Operations, RAID 1 (128 KB) IOMETER 07...
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Performance factors for HP ProLiant Serial Attached Storage (SAS)


Page 6
... SATA, NCQ SATA, and SAS 2-drive array with HP Smart Array Controller P400 Controller, RAID 1 RELATIVE PERFORMANCE (%) 700% Random Operations, RAID 1 (128 KB) IOMETER 07.30.2004 600% 500% 400% 300% 200% 100% 0% 4KB RANDOM READ 4KB RANDOM WRITE 4KB OLTP 8KB RANDOM READ 8KB RANDOM WRITE 8KB OLTP 64KB RANDOM READ 64KB RANDOM WRITE SATA, Non-NCQ 60-GB, 5.4K, 25/75 R/W cache (baseline performance level) SATA, NCQ 120-GB, 5.4K, 25/75 R/W cache SAS, 72-GB...
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Performance factors for HP ProLiant Serial Attached Storage (SAS)


Page 7
Throughput performance: random operations of non-NCQ SATA, NCQ SATA, and SAS 2-drive array with HP Smart Array P400 Controller, RAID 1 THROUGHPUT (IOPS) 1000 Random Opeations, RAID 1 (128 KB) IOMETER 07.30.2004 900 800 700 600 500 400 300 200 100 0 4KB RANDOM READ 4KB RANDOM WRITE 4KB OLTP 8KB RANDOM READ 8KB RANDOM WRITE 8KB OLTP 64KB RANDOM READ 64KB RANDOM WRITE SATA, Non-NCQ 60-GB, 5.4K...
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Performance factors for HP ProLiant Serial Attached Storage (SAS)


Page 8
... on form factor and platter speed, along with HP Smart Array P800 Controller, RAID 0 (128K) % Diff - While providing maximum storage capacity and performance, RAID 0 does not provide any disk redundancy. 8 SFF 15K Performance compared to LFF 15K 72-GB SAS drives with differences in a RAID 0 solution than LFF SAS drive arrays. The following configuration was used for LFF SAS drives 4 SFF SAS drives 6 SFF SAS drives 8 SFF SAS drives 12 SFF SAS drives 256 128 64 32 16 8 4 2 1 256...
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Performance factors for HP ProLiant Serial Attached Storage (SAS)


Page 9
... 64 32 16 8 4 2 1 256 128 64 32 16 8 4 2 1 256 128 64 32 16 8 4 2 1 256 128 64 32 16 8 4 2 1 RAID 1 is a strategy for achieving redundancy rather than LFF SAS drives for most RAID 1 configurations. 9 SFF 15K Performance compared to LFF 15K 72-GB SAS drives with HP Smart Array P800 Controller, RAID 1 (128K) % Diff - Nevertheless, as indicated in Figure 5, SFF SAS drives provide better performance than enhanced performance. Figure 5.
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Performance factors for HP ProLiant Serial Attached Storage (SAS)


Page 10
... 8 4 2 1 256 128 64 32 16 8 4 2 1 256 128 64 32 16 8 4 2 1 10 Figure 6. RAID5 performance of SFF SAS drives with the HP Smart Array P800 Controller using RAID 5 (64K). Figure 6 illustrates the IOPS performance of various array sizes of SFF 15K 72-GB SAS drive arrays THROUGHPUT (IO Per Second) 4500 4000 3500 3000 2500 2000 1500 1000 500 0 4KB RANDOM READ 4KB RANDOM WRITE SA-P800, RAID-5 (64KB) -
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Performance factors for HP ProLiant Serial Attached Storage (SAS)


Page 11
... 7 compare sequential read performance between 10K (rpm) and 15K SFF SAS drives operating as a 6-drive array with greater queue depths, user interaction response of the system is the number of commands waiting to be serviced by the charts, 15K drives show the drive array performance for sequential reads per block size at a specific queue (Q) depth. Charts 7A through 7E show a significant advantage where the requested data blocks are...
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Performance factors for HP ProLiant Serial Attached Storage (SAS)


Page 12
... RPM SFF SAS drives, RAID 5 2500 4 KB Random Read 64 KB Random Read 512 KB Random Read 2000 1500 IOPS 1000 500 No. of drives 3 4 5 6 7 8 3 4 5 6 7 8 3 4 5 6 7 8 10K HDD & P400 controller 15K HDD & 6402 controller As indicated in Figure 8, 15K drive arrays consistently provide higher random read IOPS than the RAID 5 stripe size (128 KB in this case). Figure 8 compares the random read performance of 10K and 15K SFF SAS drives for the specific...
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Performance factors for HP ProLiant Serial Attached Storage (SAS)


Page 13
... the space and half the power of hard drive types are subject to change without a significant increase in today's server industry. SAS drive specifications Table 3 compares the seek time and power consumption of SFF (2.5-inch) SAS drives available from HP at time of currently available SAS drives: http://h18004.www1.hp.com/products/servers/proliantstorage/ serial/sas/index.html Table 3. The right HDD type is 100 percent, SFF SAS drives excel in performance and reliability. Small-to...
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Performance factors for HP ProLiant Serial Attached Storage (SAS)


Page 14
... should be liable for technical or editorial errors or omissions contained herein. The only warranties for HP SAS drives "Serial ATA technology" technology brief Web address http://h18004.www1.hp.com/products/quickspecs/12244_na/12 244_na.html http://h20000.www2.hp.com/bc/docs/support/SupportManual/c0 0301688/c00301688.pdf "Serial-Attached SCSI technology" technology brief http://h20000.www2.hp.com/bc/docs/support/SupportManual/c0 0302340...

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We have the following 2 documents available for the HP 418371-B21:
  • Performance factors for HP ProLiant Serial Attached Storage (SAS)
  • Hot-Pluggable SAS and SATA Hard Drive Installation Instructions for HP ProLiant Servers
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