On 09 Feb 2001 11:18:23 +0100, Arjan van de Ven wrote:
> In article <[EMAIL PROTECTED]> you wrote:
> > Hello all,
>
> > I have a 5G RAID1 device that I created under 2.2.16. The device is
> > made of /dev/hda4 (Maxtor 102.G UDMA66) and /dev/hde4 (IBM 20.5G UDMA100).
> > Under 2.2.16 'hdparm -t /dev/md0' gave read speeds of 22-26MB/sec on this
> > combo. I've been running 2.4 series kernels for a while, and have noticed
> > that access to the array takes a bit longer. 'hdparm -t /dev/md0' now tops
> > out at 17MB/sec. Is this to be expected in the transition to 2.4, or did I
> > mess something up?
>
> (single threaded) RAID1 performance in 2.4 is limited to the speed of the
> fastest disk[1]. Can you hdparm -t both your disks seperatly and post the
> numbers here ?
I was under the impression that some form of the RAID 1 read balancing
patch (for the 2.2.x kernels) had been incorporated into 2.4.x. Is this
incorrect?
Greg
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