Re: Running slower after raid0
On Tue, Nov 01, 2005 at 10:35:05AM -0500, Roberto C. Sanchez wrote:
> How is that? The RAID1 on my system read at nearly 2x the speed of a
> single drive. Writing is where the performance is not nearly as good.
> But the, I am using IDE drives with each of the two drive son its own
> channel.
Not on mine. I have two 7200.8 300gig drives. md1 is raid1:
/dev/sdc:
Timing buffered disk reads: 184 MB in 3.02 seconds = 61.00 MB/sec
HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate ioctl
for device
/dev/sdd:
Timing buffered disk reads: 184 MB in 3.00 seconds = 61.28 MB/sec
HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate ioctl
for device
/dev/md1:
Timing buffered disk reads: 210 MB in 3.01 seconds = 69.71 MB/sec
It may be reading high on the single disk throughput, though, since flush
isn't working.
--
Tom Vier <tmv@comcast.net>
DSA Key ID 0x15741ECE
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