Re: RAID 5 performance problems

[Felipe Alfaro Solana]

On Thu, 2003-04-03 at 17:45, Jonathan Vardy wrote:
> I'm having trouble with getting the right performance out of my software
> raid 5 system. I've installed Red Hat 9.0 with kernel 2.4.20 compiled
> myself to match my harware (had the same problem with the default
> kernel). When I test the raid device's speed using 'hdparm -Tt /dev/hdx'
> I get this:
> /dev/md0:
> Timing buffer-cache reads:   128 MB in  1.14 seconds =112.28 MB/sec
> Timing buffered disk reads:  64 MB in  2.39 seconds = 26.78 MB/sec

Well, if I'm not wrong, you're testing physical, individual drives, not
the RAID5, combined, logical volume. So, your values are pretty normal.

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