BBA
09-02-2002, 12:13 PM
I have come to the conclusion the Intel Application Accelerator is a little screwy.
I just put in a WD 80M drive as my system drive ( removed the SCSI 10K stuff ). It's HD Tach performance is as good as the 10K SCSI drive I had, except the disk access times are a little higher.
I was checking Sandra for file system performance...and the 80G drive was showing about 25M/sec, and Sandra said disk caching was not enabled. Of course, it looked like it was enabled to me from device manager...so I decided the Intel drivers may do it.
I loaded the latest version of Intel App Accellerator, V2.2, and re-ran Sandra. The performance went down to 16M/sec with 10-14% processor useage as reported by HDTach, and HDTach throughput did not change. Something screwey was going on...so I ran the Intel App Accel aplication, and configured the drives for max performance. I had to reboot.
Sandra now showed 17M/sec, 10-14% CPU still. Not much difference. I uninstalled the Intel App Accelerator, rebooted and rechecked sandra, still shows only 17M/sec, but CPU use is now down to 4-5% where it should be for ATA drives.
Of course, the whole time HDTach showed the perf starting at about 48MB/sec, then tapering to about 28MB/sec, which I think is normal. The only thing is HDTach does not measure file system performance...only hardware level disk throughput. So I know my actual file system perf is screwey now ( as evidenced by Sandra )
How do I get fs performance back or is Sandra just really that screwed up?
I just put in a WD 80M drive as my system drive ( removed the SCSI 10K stuff ). It's HD Tach performance is as good as the 10K SCSI drive I had, except the disk access times are a little higher.
I was checking Sandra for file system performance...and the 80G drive was showing about 25M/sec, and Sandra said disk caching was not enabled. Of course, it looked like it was enabled to me from device manager...so I decided the Intel drivers may do it.
I loaded the latest version of Intel App Accellerator, V2.2, and re-ran Sandra. The performance went down to 16M/sec with 10-14% processor useage as reported by HDTach, and HDTach throughput did not change. Something screwey was going on...so I ran the Intel App Accel aplication, and configured the drives for max performance. I had to reboot.
Sandra now showed 17M/sec, 10-14% CPU still. Not much difference. I uninstalled the Intel App Accelerator, rebooted and rechecked sandra, still shows only 17M/sec, but CPU use is now down to 4-5% where it should be for ATA drives.
Of course, the whole time HDTach showed the perf starting at about 48MB/sec, then tapering to about 28MB/sec, which I think is normal. The only thing is HDTach does not measure file system performance...only hardware level disk throughput. So I know my actual file system perf is screwey now ( as evidenced by Sandra )
How do I get fs performance back or is Sandra just really that screwed up?