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Old March 16th, 2010, 09:46
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Default run fsck on root file system
If i run fsck on one filesystem and fsck need to repair some things then this partition must be unmounted

correct ?

So running fsck on root file system isn't possible within same OS ? correct ?


What is the best way to do that, live cd ?


BR,

Jurif
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Old March 16th, 2010, 10:09
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boot into single user mode, root will be mounted read only, then run fsck , and you will be able to fix everything
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Old March 16th, 2010, 10:21
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Is it possible to fix filesystem which is mounted read only ?
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Old March 16th, 2010, 10:26
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If you don't want reboot your system (for any reasons) you can also remount file system as read-only. For example:
Code:
mount -fr /
and run fsck. After finish you can remount file system as read-write:
Code:
mount -fw /
This method may be unsafe if you have only one partition for system (without separate /var /usr /tmp etc.). Some processes may crash if they can't write on the file system.

If you have physical access to your machine, the safe method will be boot to single mode, then run fsck.
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Old March 16th, 2010, 11:18
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Quote:
Originally Posted by sniper007 View Post
Is it possible to fix filesystem which is mounted read only ?
that's the way root should be fsck'ed
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Old March 16th, 2010, 11:44
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You cannot "fix" a read-only mounted filesystem:
Quote:
If the operator does not have write permission on the file system fsck_ffs will default to a -n action.
See fsck_ffs(8)
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Old March 16th, 2010, 11:55
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ah sorry, haven't been using UFS for long time....
# mount -uo rw /
solves this


Thanks SirDice for fixing me
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Old March 16th, 2010, 12:26
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Is it possible to fix filesystem which is mounted anyway ?
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Old March 16th, 2010, 13:36
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Originally Posted by sniper007 View Post
Is it possible to fix filesystem which is mounted anyway ?
If I'm not mistaken only the errors that are fixable in "preen" mode.
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