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SubjectRe: Disk performance degradation
On Tue, 29 Jul 2003, Lou Langholtz wrote:

> Anyone want to field why we aren't we just setting the default to 512 so
> users don't need to adjust this? I'm sure there's a good reason... I'd
> just like to know what it is ;-)

mike:~# hdparm -a 512 /dev/hda

setting fs readahead to 512
BLKRASET failed: Invalid argument
readahead = 8 (on)

mike:~# hdparm -a 255 /dev/hda

setting fs readahead to 255
readahead = 255 (on)

mike:~# hdparm -a 256 /dev/hda

setting fs readahead to 256
BLKRASET failed: Invalid argument
readahead = 255 (on)

Probably for reasons like that. For some reason, I can't set my ICH4
based controller(ASUS P4B533) and Quantum Fireball AS40.0 to more than
255. Kernel is 2.4.21

Or I'm missing more of this thread than I thought and I'm completely off
topic here!

(i'm guessing the latter)

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