Hi All.
I have two running servers (drbd primary, drbd secondary). When there is a problem with one of them we switch to the second one. Currently on the /dev/drbd0 (it has /xxx ext3 filesystem directly on it) we have some filesystem problems (after fsck -n). I would like to correct these errors but the filesystem should be unmounted first (I would like to avoid it if possible).
Is there a way to make fsck -a on mounted filesystem for ext3? My setup is:
ext3 filesystem (problems) ^ DRBD ^ LVS ^ RAID
Any ideas?
Best regards, Rafal.
On 04/12/2012 09:50 AM, Rafał Radecki wrote:
Hi All.
I have two running servers (drbd primary, drbd secondary). When there is a problem with one of them we switch to the second one. Currently on the /dev/drbd0 (it has /xxx ext3 filesystem directly on it) we have some filesystem problems (after fsck -n). I would like to correct these errors but the filesystem should be unmounted first (I would like to avoid it if possible).
Is there a way to make fsck -a on mounted filesystem for ext3? My setup is:
No. None of the popular Filesystems support online fsck.
Regards, Dennis
--On Thursday, April 12, 2012 03:17:37 PM +0200 Dennis Jacobfeuerborn dennisml@conversis.de wrote:
On 04/12/2012 09:50 AM, Rafał Radecki wrote:
I have two running servers (drbd primary, drbd secondary). When there is a problem with one of them we switch to the second one. [...]
Is there a way to make fsck -a on mounted filesystem for ext3?
No. None of the popular Filesystems support online fsck.
However, if you're using pacemaker the RA (IIRC) has the option of doing an 'fsck -p' before mounting. OTOH, since an fsck has no predicatable run time limit, a long fsck might cause a 'failed start' condition, causing a cascade from one node to another to another ...
(more details on this mechanism are probably more appropriate to the applicable HA lists)
Devin
On 04/12/2012 08:17 PM, Devin Reade wrote:
--On Thursday, April 12, 2012 03:17:37 PM +0200 Dennis Jacobfeuerborn dennisml@conversis.de wrote:
On 04/12/2012 09:50 AM, Rafał Radecki wrote:
I have two running servers (drbd primary, drbd secondary). When there is a problem with one of them we switch to the second one. [...]
Is there a way to make fsck -a on mounted filesystem for ext3?
No. None of the popular Filesystems support online fsck.
However, if you're using pacemaker the RA (IIRC) has the option of doing an 'fsck -p' before mounting. OTOH, since an fsck has no predicatable run time limit, a long fsck might cause a 'failed start' condition, causing a cascade from one node to another to another ...
(more details on this mechanism are probably more appropriate to the applicable HA lists)
"doing an 'fsck -p' before mounting" still means you have to take the fs offline though so this doesn't really change anything.
Regards, Dennis
--On Thursday, April 12, 2012 10:38:56 PM +0200 Dennis Jacobfeuerborn dennisml@conversis.de wrote:
On 04/12/2012 08:17 PM, Devin Reade wrote:
However, if you're using pacemaker the RA (IIRC) has the option of doing an 'fsck -p' before mounting. [...]
"doing an 'fsck -p' before mounting" still means you have to take the fs offline though so this doesn't really change anything.
Correct; it still has to be offline. I was mentioning it as a possible alternative for the OP's use case if this is more than just a "one of". On re-reading the original message, though, it sounds like it might just be bare DRBD rather than in combination with pacemaker.
Devin
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Dennis Jacobfeuerborn -
Devin Reade -
Rafał Radecki