On 04/07/2011 15:53, tethys ocean wrote: >> If a partition was not unmounted cleanly (eg. the machine crashed, or >> > the power was cut off suddenly) then fsck(8) should be used to check and >> > fix any problems on the filesystem. If you've booted into single-user >> > mode, then definitely fsck any partitions before trying to mount them. >> > > *I guess If I can do fsck without unmount partition I can lost all my data > isn't it?*
fsck on an unmounted partition will change on-disk data structures in
ways that the kernel doesn't expect. So, yes, one consequence is that
you can lose or corrupt data. You probably wouldn't lose everything in
the partition -- but you would tend to cause corruption predominantly in
files that are more actively used.
So don't do that.
Cheers,
Matthew
--
Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard
Flat 3
PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate
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