On Tue, Jul 03, 2007 at 04:32:13PM +1000, Jonathan Gray wrote:
> Include the output of 'atactl wd0' perhaps you have something like
> caching turned off. Also you can't hope for similiar results if you
> use different programs on both systems.
Disk I/O is the only test where I use different programs (hdparm and
dd), as I couldn't find a port/package of hdparm for OpenBSD. Still, I
think the results are so different that they set of "alarm bells" --
8.5-8.7 MB/s vs. 45-46 MB/s.
Thanks for your interest my case.
Here is the output from "atactl wd0". It looks like I have caching
turned on (read look-ahead and write cache):
Model: WDC WD1200BEVE-11UYT0, Rev: 01.04A01, Serial #: WD-WXE407324062
Device type: ATA, fixed
Cylinders: 16383, heads: 16, sec/track: 63, total sectors: 234441648
Device capabilities:
ATA standby timer values
IORDY operation
IORDY disabling
Device supports the following standards:
ATA-1 ATA-2 ATA-3 ATA-4 ATA-5 ATA-6 ATA-7
Master password revision code 0xfffe
Device supports the following command sets:
NOP command
READ BUFFER command
WRITE BUFFER command
Host Protected Area feature set
Read look-ahead
Write cache
Power Management feature set
Security Mode feature set
SMART feature set
Flush Cache Ext command
Flush Cache command
Device Configuration Overlay feature set
48bit address feature set
Automatic Acoustic Management feature set
Set Max security extension commands
Advanced Power Management feature set
DOWNLOAD MICROCODE command
IDLE IMMEDIATE with UNLOAD FEATURE
SMART self-test
SMART error logging
Device has enabled the following command sets/features:
NOP command
READ BUFFER command
WRITE BUFFER command
Host Protected Area feature set
Read look-ahead
Write cache
Power Management feature set
SMART feature set
Flush Cache Ext command
Flush Cache command
Device Configuration Overlay feature set
48bit address feature set
Advanced Power Management feature set
DOWNLOAD MICROCODE command
Martin
