dovecot - May 2007 - input / output error in dovecot.log

Hello,
>From time to time, I saw input / output error on rename() or pwrite_full(),
for example:
dovecot: May 02 05:46:18 Error: IMAP(joe): rename(/fs/joe/Maildir/.Sent
Items/tmp/1178084777.P21895Q0M200058.tkodog.no-ip.com.com, /fs/joe/Maildir/.Sent
Items/cur/1178084777.P21895Q0M200058.tkodog.no-ip.com:2,S) failed: Input/output
error
dovecot: May 02 06:29:49 Error: IMAP(victor): pwrite_full() failed with file
/fs/victor/Maildir/dovecot.index.log: Input/output error
dovecot: May 02 08:21:29 Error: IMAP(victor): pwrite_full() failed with file
/fs/victor/Maildir/dovecot.index.log: Input/output error
dovecot: May 03 06:02:06 Error: IMAP(joe): rename(/fs/joe/Maildir/.Sent
Items/tmp/1178172125.P16867Q0M173436.tkodog.no-ip.com, /fs/joe/Maildir/.Sent
Items/cur/1178172125.P16867Q0M173436.tkodog.no-ip.com.com:2,S) failed:
Input/output error

What could be the cause of this problem and the consequences?

Regards,

- Joe

On Thu, 2007-05-03 at 14:15 +0800, Joe Wong wrote:
> 
> 
> >From time to time, I saw input / output error on rename() or
> pwrite_full(), for example:
> 
> dovecot: May 02 05:46:18 Error: IMAP(joe):
> rename(/fs/joe/Maildir/.Sent
> Items/tmp/1178084777.P21895Q0M200058.tkodog.no-ip.com.com,
/fs/joe/Maildir/.Sent Items/cur/1178084777.P21895Q0M200058.tkodog.no-ip.com:2,S)
failed: Input/output error
..
> What could be the cause of this problem and the consequences?
Your hard disk is dying (or the network with NFS)? Syscalls should never
return I/O error unless something's really wrong. dmesg most likely
gives additional information.

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