hi ya robert
even if the disks suppose to support 40/80/160MB per sec transfers..
you seldom get close to those ratings...and sustain that transfer speed
- check if you have dma mode turned on in your bios and scsi controllers
- to do more tweeking...
- check the length of the cables ... too many spares ??
( change cable )
- if one disk is a scsi2 and another disk is a scsi3 and another
is ultra-160 than put different speed disks on different cables
- partition scheme also affects transfer speeds
- try bonnie/tiobench for checking actual speed of disk write/reads
hdparm for ide disks
c ya
alvin
http://www.Linux-1U.net/Disks/ ide vs scsi transfer speeds
On Sun, 21 Apr 2002, Robert Webb wrote:
> Hi all,
>
> I have a Symbios SCSI controller built onto my MB. The bios and debian
> on boot up report 40 MegaBit transfer rate. But further down in the
> kern.log I noticed the following:
>
> sym53c876-0-<0,*>: FAST-5 WIDE SCSI 10.0 MB/s (200 ns, offset 15) SCSI
> device sda: hdwr sector= 512 bytes. Sectors= 8888924 [4340 MB] [4.3 GB]
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