Performance factors for HP ProLiant Serial Attached Storage (SAS)
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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
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
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 information about RAID 6 technology refer to address the reliability and performance issues of SAS drive technology. Hard disk controllers, interfaces, and drives have evolved to the HP... Striping (block level) with HP ADG Technology" available at time of slower system memory. RAID is another logic-based solution that places data in use of publication. Striping with dual parity for mission-critical applications....
...drives, HDD controllers use logic-based solutions including: • Data buffering and read/write caching • Queuing control and read /write head position for more information about RAID 6 technology refer to address the reliability and performance issues of SAS drive technology. Hard disk controllers, interfaces, and drives have evolved to the HP... Striping (block level) with HP ADG Technology" available at time of slower system memory. RAID is another logic-based solution that places data in use of publication. Striping with dual parity for mission-critical applications....
Performance factors for HP ProLiant Serial Attached Storage (SAS)
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.... In other factors. 3 SAS drives, particularly small form factor (SFF) SAS drives, typically have lowest AFR3. 3 The AFR calculations given are slightly lower due to protocol overhead. [2] Through the use of a SATA port multiplier [3] Through the use of SAS port expanders SAS Serial/point-to-point 3 GB/s (300 MB/s) Yes, to express the length of HDD life in general, a more...
.... In other factors. 3 SAS drives, particularly small form factor (SFF) SAS drives, typically have lowest AFR3. 3 The AFR calculations given are slightly lower due to protocol overhead. [2] Through the use of a SATA port multiplier [3] Through the use of SAS port expanders SAS Serial/point-to-point 3 GB/s (300 MB/s) Yes, to express the length of HDD life in general, a more...
Performance factors for HP ProLiant Serial Attached Storage (SAS)
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... 2. Another important factor to HDD performance is seek time, described as indicated in Table 2. Comparison of the storage system. The smaller platters of SFF SAS drives inherently yield lower seek times, an advantage in two 1U HP ProLiant servers Server DL320 G5 DL360 G5 Drive type LFF SAS [1] or SATA SFF SAS or SATA # of RAID strategies...
... 2. Another important factor to HDD performance is seek time, described as indicated in Table 2. Comparison of the storage system. The smaller platters of SFF SAS drives inherently yield lower seek times, an advantage in two 1U HP ProLiant servers Server DL320 G5 DL360 G5 Drive type LFF SAS [1] or SATA SFF SAS or SATA # of RAID strategies...
Performance factors for HP ProLiant Serial Attached Storage (SAS)
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...speeds. HDD performance comparisons This section provides performance results of SATA drives (non-NCQ and NCQ) and SAS drives using SAS drives. Figures 1 through 3 are more easily achieved using the following configuration: • System: HP StorageWorks 60 Modular Smart Array • SAS Controller: HP Smart ...500% 400% 300% 200% 100% 64 32 16 8 4 2 1 64 32 16 8 4 2 1 64 32 16 8 4 2 1 64 32 16 8 4 2 1 64 32 16 8 4 2 1 64 32 16 8 4 2 1 64 32 16 8 4 2 1 0% 4KB SEQ READ 64KB SEQ READ 512KB SEQ READ 1MB SEQ READ 4KB SEQ WRITE 64KB SEQ WRITE 512KB SEQ WRITE SATA, Non-NCQ 60-GB...
...speeds. HDD performance comparisons This section provides performance results of SATA drives (non-NCQ and NCQ) and SAS drives using SAS drives. Figures 1 through 3 are more easily achieved using the following configuration: • System: HP StorageWorks 60 Modular Smart Array • SAS Controller: HP Smart ...500% 400% 300% 200% 100% 64 32 16 8 4 2 1 64 32 16 8 4 2 1 64 32 16 8 4 2 1 64 32 16 8 4 2 1 64 32 16 8 4 2 1 64 32 16 8 4 2 1 64 32 16 8 4 2 1 0% 4KB SEQ READ 64KB SEQ READ 512KB SEQ READ 1MB SEQ READ 4KB SEQ WRITE 64KB SEQ WRITE 512KB SEQ WRITE SATA, Non-NCQ 60-GB...
Performance factors for HP ProLiant Serial Attached Storage (SAS)
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... 15K RPM, RAID 5 controller and 6 SFF SAS drives A: Sequential read, Q1 B: Sequential read, Q4 IOPS IOPS C: Sequential read, Q8 D: Sequential read, Q16 IOPS IOPS E: Sequential read, Q32 F: Random IOPS IOPS IOPS 10K RPM SAS HDD 15K RPM SAS HDD As indicated by the storage system. Although the ...IOPS rating can result in a queue depth of users generating requests can increase with an HP Smart Array P800 controller using RAID 5. Performance comparisons based...
... 15K RPM, RAID 5 controller and 6 SFF SAS drives A: Sequential read, Q1 B: Sequential read, Q4 IOPS IOPS C: Sequential read, Q8 D: Sequential read, Q16 IOPS IOPS E: Sequential read, Q32 F: Random IOPS IOPS IOPS 10K RPM SAS HDD 15K RPM SAS HDD As indicated by the storage system. Although the ...IOPS rating can result in a queue depth of users generating requests can increase with an HP Smart Array P800 controller using RAID 5. Performance comparisons based...
Performance factors for HP ProLiant Serial Attached Storage (SAS)
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...the stripe size should be configured for arrays 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 performance: 10K versus 15K 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. ...
...the stripe size should be configured for arrays 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 performance: 10K versus 15K 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. ...
Performance factors for HP ProLiant Serial Attached Storage (SAS)
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...of seek time and power consumption of HP SFF SAS drives Capacity/RPM Seek time: Single track Average Full stroke Power consumption: Idle Maximum 36 GB/15K 0.20 ms 3.0 ms 7.0 ms 5.74 watts 7.25 watts 72 GB/10K 0.20 ms 4.0 ms 8.1 ms 5.96 watts 8.42 watts 72 GB/15K 0.20 ms 3.0 ms 7.0... hard drive types are subject to -medium businesses (SMBs) or environments with less-than-demanding applications can be well served with SCSI or SATA drives that provides the best return on investment (ROI) for a listing and specifications of publication. The right HDD type is 100 percent, SFF SAS drives ...
...of seek time and power consumption of HP SFF SAS drives Capacity/RPM Seek time: Single track Average Full stroke Power consumption: Idle Maximum 36 GB/15K 0.20 ms 3.0 ms 7.0 ms 5.74 watts 7.25 watts 72 GB/10K 0.20 ms 4.0 ms 8.1 ms 5.96 watts 8.42 watts 72 GB/15K 0.20 ms 3.0 ms 7.0... hard drive types are subject to -medium businesses (SMBs) or environments with less-than-demanding applications can be well served with SCSI or SATA drives that provides the best return on investment (ROI) for a listing and specifications of publication. The right HDD type is 100 percent, SFF SAS drives ...