On Mon, Feb 09, 2004 at 10:34:42PM -0500, Gaspar Bakos wrote:
> Hi,
Hi,
> I am creating XFS filesystem on a 750Gb partition, which is made up of
> 4x250Gb WD disks in RAID-5 + 3ware card. System is RH9.0 with 2.4.23
> kernel and xfs patch as of 031010 from the oss.sgi site.
> [...]
> hdparm -tT /dev/sda
> /dev/sda:
> Timing buffer-cache reads: 128 MB in 0.20 seconds =640.00 MB/sec
> Timing buffered disk reads: 64 MB in 1.55 seconds = 41.29 MB/sec
>
> It is OK, but I am not shocked by the performance.
sda is one disk from array or whole array?
I think this is normal behaviour. Raid 5 isn't raid0 and is quite slow
(and realy slow for writting operations)...
> Are there any recommended tests to test the filesystem before starting to
> populate it with all that 750Gb of data?
Stress operations with big files and many small files can help. Try it
under filesystem and direct disk access.
>
> All the best
> Gaspar
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David "Dave" Jez Brno, CZ, Europe
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