Messages in this thread | | | From | "Jonathan Vardy" <> | Subject | Re: RAID 5 performance problems | Date | Thu, 3 Apr 2003 23:14:12 +0200 |
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> 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.
/dev/md0 is the raid device and as you can see from the bonny++ results in my original mail the, performance is not really normal.
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