Greetings -
I have been battling what appears to be a disk I/O bottleneck. I was hoping that one of you smart people might be able to provide some insight into what appears to be an under-performance on DL320-G2 (3.0GHz) servers.
The following table represents some data that was collected using the PAT (Performance Assessment Tool).
Server Type Quick Sequential
99.21 DL-380-2400 15.3 MB/s 58.4 MB/s
97.21 DL-380-3000 19.6 MB/s 60.7 MB/s
99.23 DL-320-3000 9.4 MB/s 49.2 MB/s
97.22 DL-320-3000 9.5 MB/s 50.3 MB/s
97.23 DL-320-3000 10.7 MB/s 48.8 MB/s
99.22 DL-320-1000 5.7 MB/s 35.9 MB/s
The DL-320 servers are equipped with single ATA-100 drive (no RAID).
The DL-380 servers are equipped with dual SCSI Ultra 3 or 320 drives (RAID 1).
My questions are:
Should it be expected to have the DL-320 perform so much worse (30-50%) on disk performance?
Is this strictly attributable to the differences in IDE ATA-100 vs. SCSI SmartArray5i?
Doesn't ATA-100 imply 100 MB/s transfer rates?
Do these numbers look believable?
The drives/version are as follows:
DL-320: Integrated Ultra ATA-100 IDE RAID controller; LSI Logic Corp version 2.5.2003.613 (date 6/13/2003)
DL-380: SmartArray 5i; HP 5.62.0.32 (date 6/14/2004)
Thanks in advance for any assistance that will help my understanding or set the correct expectation.
Regards - Ziggy
P.S. This thread has been moved from Disk Array to ProLiant Servers (ML,DL,SL). - Hp Forum Moderator
