[SOLVED] Safe to tune2fs a mounted volume to prevent disk checks at reboot?

anon091 · 05-12-2010, 02:20 PM

I have some large volumes that I don't want to automatically be e2fsck'd when I reboot the server. is it safe to change maximum mount count to -1 and check interval to 0 while a volume is mounted, or will that cause problems to the file system?

syg00 · 05-12-2010, 04:49 PM

You can change the setting safely. Not checking the f/s at all (ever) is probably not advisable.

anon091 · 05-12-2010, 04:50 PM

Thanks Syg. I just want to not have it run during this one reboot in particular. I'm going to change the settings back afterward.

dgwhiting · 02-06-2012, 01:49 PM

On a related note, is it safe to run "tune2fs -T now" against a mounted filesystem to reset the "Last checked" time? Thanks.

anon091 · 02-06-2012, 01:52 PM

My understanding of that option is yes as that's just setting the timestamp the volume was last checked, not actually doing any file system modifications. But you may want to let someone else chime in too.

syg00 · 02-06-2012, 04:32 PM

I work on the basis of "if it's safe to turn the journal on and off, what harm can any of the rest of the options do ?".
So yes, go for it. They all modify the filesystem, even if it's just meta-data.

anon091 · 02-06-2012, 04:37 PM

Yeah, guess i meant more like it wasn't trying to fix bad inodes and stuff like that, was just tweaking an attribute of the file system. i stand corrected.