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тАО01-20-2001 04:00 PM
тАО01-20-2001 04:00 PM
Slow Performance
I am experiencing very low write performance.
I have a single 9G Seagate Cheetah 10k RPM SCSI drive attached to the raid controller (Raid 0 config since it is a single drive). My read performance is as I would expect - very fast, improved by cacheing. I have the cache configured as 8M read/8M write.
The write performance is pretty much 2MB/s - much lower the I get with a standard SCSI controller (about 10MB/s on the same drive)
Why is this? How can it be corrected?
I have a single 9G Seagate Cheetah 10k RPM SCSI drive attached to the raid controller (Raid 0 config since it is a single drive). My read performance is as I would expect - very fast, improved by cacheing. I have the cache configured as 8M read/8M write.
The write performance is pretty much 2MB/s - much lower the I get with a standard SCSI controller (about 10MB/s on the same drive)
Why is this? How can it be corrected?
2 REPLIES 2
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тАО01-21-2001 04:00 PM
тАО01-21-2001 04:00 PM
Re: Slow Performance
I have tried a 2 drive RAID 0 and a 2 drive RAID 1 configuration as well. On RAID 1 I see a read performance bursting to 39MB/s and averaging 15MB/s. Max write throughput is 2.5MB/s averaging 2.3MB/s. I see a similar poor write performance on the RAID 0 configuration.
Hooking the same drive to a standard SCSI controller yields much higher write performance.
I am using HD Tach 2.61, CLI Bench 3 and Ziff Davis Winbech 99 v1.2 for benchmarking, all the current versions. I have current array drivers. I see roughly identical performance numbers across all the benchmarks.
Hooking the same drive to a standard SCSI controller yields much higher write performance.
I am using HD Tach 2.61, CLI Bench 3 and Ziff Davis Winbech 99 v1.2 for benchmarking, all the current versions. I have current array drivers. I see roughly identical performance numbers across all the benchmarks.
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тАО02-06-2001 04:00 PM
тАО02-06-2001 04:00 PM
Re: Slow Performance
Try firmware upgrade on the Smart 2/DH . Also upgrade the Array Controller driver .
The opinions expressed above are the personal opinions of the authors, not of Hewlett Packard Enterprise. By using this site, you accept the Terms of Use and Rules of Participation.
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