Re!
On Wed, 31 Mar 1999 [EMAIL PROTECTED] wrote:
> hardware:
> 2 x IBM UltraStar 9ES 4.5 GB U2W
> Adaptec 2940 UW
> AMD K6 - 200 MHz
> 64 MB RAM
>
> Each disk gives us around 11 MB/s using hdparm -t /dev/sd[ab]
>
> If we run hdparm -t /dev/sda & hdparm -t /dev/sdb, (two hdparm's
> concurrently) we get roughly 8.5 MB/s from each disk, a total of
> 17 MB/s.
Is my assumtion correct, that hdparm -t uses the disks nearly linear?
My two disk give with
dd if=/dev/sdc of=/dev/null or dd if=/dev/md0 of=/dev/null
about 10 MB/s and together in the md0-Device abount 20 MB/s.
> However, when we set up /dev/md0, a RAID-0 device between the two
> disks, (in a configuration similar to what I've run myself), we get
> around 10 MB/s from the md0 device. -- Less that we can get
> from one single disk.
> Does anyone have a clue about what could be going on ?? The main
> difference between my own box which ran a similar configuration for long
> time seems to be that this box is a K6. Anyone running raid0 on similar
> configurations with a K6 CPU ?
I'm using a K6-2 333Mhz.
Bye,
Rob
