HP 492620-B21 - Dual Port 300 GB Hard Drive Support and Manuals
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Popular HP 492620-B21 Manual Pages
Hot-Pluggable SAS and SATA Hard Drive Installation Instructions for HP ProLiant Servers - Page 1
... you are set forth in Japanese, please contact the HP Japan Customer Care Center and provide them with your computer or contact your HP authorized reseller for procedures to http://www.hp.com/jp/manual/. Pull the blank drive bezel from the disk enclosure before
installing a new hard drive. The only warranties for HP products and services are...
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 ...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
Performance factors for HP ProLiant Serial Attached Storage (SAS) - Page 2
...data buffering and caching techniques to take advantage of the read /write reordering • Error management and pre-failure warning • Redundant Array of publication. Mirroring and striping for ... information of the latest small form factor SAS drives available from HP at http://h20000.www2.hp.com/bc/docs/support/SupportManual/c00386950/c00386950.pdf
2 Serial Attached SCSI (SAS) has ...
Performance factors for HP ProLiant Serial Attached Storage (SAS) - Page 3
...run per year (100 percent duty cycle = 8760 hours per connection
15 [2]
HDD type supported
SCSI
SATA
Relative reliability
Good
Adequate
Best suited for
Enterprise servers (replaced by SAS)
Entry level servers
NOTES: [1] Actual data rates are for high input/out ... for an enterprise HDD with thousands or hundreds of thousands of devices supported per
16
interface per year).
Performance factors for HP ProLiant Serial Attached Storage (SAS) - Page 4
...SAS drives have a cost-per-GB advantage over SFF types. Comparison of drive support in two 1U HP ProLiant servers
Server
DL320 G5
DL360 G5
Drive type
LFF SAS [1] or SATA
...with 512MB Battery Backed Write Cache option
At the drive level, smaller/faster is a key factor in setting up a system. Another important factor to HDD performance is seek time, described as indicated in Table 2....
Performance factors for HP ProLiant Serial Attached Storage (SAS) - Page 5
...play a part in system performance and should be considered when evaluating systems.
Performance comparison between SATA and SAS drives
Systems that support SAS can be configured with HP Smart ...easily achieved using the following configuration:
• System: HP StorageWorks 60 Modular Smart Array • SAS Controller: HP Smart Array P400, firmware version 4.12, 512 MB cache, RAID 1
Figure ...
Performance factors for HP ProLiant Serial Attached Storage (SAS) - Page 6
... operations of non-NCQ SATA, NCQ SATA, and SAS 2-drive array with HP Smart Array Controller P400 Controller, RAID 1
RELATIVE PERFORMANCE (%)
700%
Random Operations...16 8 4 2 1 256 128 64 32 16 8 4 2 1 256 128 64 32 16 8 4 2 1
The HP P400 controller supports NCQ, so the NCQ SATA drives provide an increase in the same configuration, and illustrates the substantial improvement of SAS drives.
6
...
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
...
Performance factors for HP ProLiant Serial Attached Storage (SAS) - Page 8
Performance comparisons between SAS drives
This section includes comparisons of performance for testing the SAS drives:
• System: HP StorageWorks 70 Modular Smart Array • SAS Controller: HP Smart Array P800, firmware version 4.06, 512 MB cache
Figure 4. SFF 15K Performance compared to LFF 15K 72-GB SAS drives with differences in a RAID 0 solution...
Performance factors for HP ProLiant Serial Attached Storage (SAS) - Page 9
..., as indicated in Figure 5, SFF SAS drives provide better performance than enhanced performance. SFF 15K Performance compared to LFF 15K 72-GB SAS drives with HP Smart Array P800 Controller, RAID 1 (128K)
% Diff - Figure 5. Performance comparison: SFF to LFF 15K
130%
RAID-1 (128KB)
IOMETER 07.30.2004
120%
110%
100%
90...
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
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...
Performance factors for HP ProLiant Serial Attached Storage (SAS) - Page 11
...but in an enterprise server environment a large number of users generating requests can increase with an HP Smart Array P800 controller using RAID 5. Chart 7F shows random read , Q32
F: Random ...a queue depth 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 ...
Performance factors for HP ProLiant Serial Attached Storage (SAS) - Page 12
... (128 KB in Figure 8, 15K drive arrays consistently provide higher random read IOPS than 10K drive arrays. Also, overall performance scales with the block size set to 128 KB. Figure 8 compares the random read performance of 10K and 15K SFF SAS drives for the...
Performance factors for HP ProLiant Serial Attached Storage (SAS) - Page 13
..., enterprise server environment where hard drive duty cycle is the one that offer economical service and good dollar-per U space can be well served with less-than-demanding applications... available from HP at time of currently available SAS drives: http://h18004.www1.hp.com/products/servers/proliantstorage/ serial/sas/index.html
Table 3. NOTE: Drive types and specifications are used...
Performance factors for HP ProLiant Serial Attached Storage (SAS) - Page 14
... description QuickSpecs for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be liable for technical or editorial errors or omissions contained herein. TC080502TB, May 2008
The only warranties for HP SAS drives
"Serial ATA technology" technology brief
Web address
http://h18004.www1.hp.com/products...
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