Disk I/O - too slow?
Don Levey
fedora-list at the-leveys.us
Tue Feb 24 01:30:02 UTC 2004
On Sun, 2004-02-22 at 05:15, Dean Mumby wrote:
I have a intel d865perl mb with hyperthreading , sata , and all the same
features , i installed fedora , redhat 9, etc with legacy mode and then
simply switched to enhanced mode and i am running fine. did you check
wether your system had enabled dma
hdparm -tT /dev/sda
/dev/sda:
Timing buffer-cache reads: 3568 MB in 2.00 seconds = 1784.00 MB/sec
Timing buffered disk reads: 166 MB in 3.00 seconds = 55.33 MB/sec
not slow at all
----------------
So... I've got DMA enabled, Multiple I/O, EIDE 32-bit and lookahead
enabled in my /etc/sysconfig/harddisks file. Running that hdparm line
gives me:
/dev/hdb:
Timing buffer-cache reads: 1204 MB in 2.00 seconds = 601.49 MB/sec
Timing buffered disk reads: 96 MB in 3.00 seconds = 31.97 MB/sec
...clearly *not* fast. This is a Maxtor Diamond ATA 120Gb drive,
7200rpm, on an ASUS A7V8X-X mb. I'm running FC1 with a 2.6.3 kernel
from kernel.org. Any suggestions for speeding up my I/O (or more info
to provide)?
TIA, -Don
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