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Re: ext3 waking hard disk



On Mon, 6 May 2002, Martin Waitz wrote:

> hi :)
>
> when using ext3, i can't get my hard disks to go to standby mode
> any more. i am using timeouts set by hdparm with 2.4.18 kernels.
>
> even when i issue a standby command manually, the disk
> spins up again after a few seconds.
> however, (to my knowledge) no user space program accessed
> this disk at that time.
>
> i suspect ext3's journal to be causing the disk accesses.
> is that possible?

Have you mounted all partitions on this disk with the "noatime" option?
When not every (readonly) file access gets stored back on the disk
(updates the file inode to reflect the latest atime). Afaik ext3 shouldn't
write anything to the disk when the journal doesn't get hit.

best regards,
michael





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