Re: NFS server waking up sleeping disks

[Timo Reimann <mailinglist-d4LLFNs4DFRA7UZ8SB9NFg@public.gmane.org>]

Timo Sirainen wrote:
> My Linux 2.6.24.1 NFS server has two disks. One of them is rarely used,
> so it's normally sleeping and is not even mounted anywhere. But after
> the NFS mount hasn't been used for a while (some hours?) doing just a
> "ls" on NFS client causes the sleeping disk to wake up and the "ls"
> reply is delayed a few seconds until the wakeup is finished.
> 
> Any ideas why it's waking up the disk that has nothing to do with NFS,
> and how to prevent it from doing this?

Your issue might be related to the same that I have (which is still
unresolved). Basically, my non-mounted backup disk keeps spinning up
after a rough 20-25 minutes of sleeping. Check out my archived thread
for details and hints how to determine disk-accessing processes:

http://marc.info/?l=linux-nfs&m=120354580303104&w=2

However, there is no `ls' or similar call required to wake up my disk.
It just happens.


Regards,

--Timo (too)