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Operating Systems Solaris fsck
# 1  
Old 09-10-2005
fsck
OS: Solaris 5.8

Everytime I run fsck -y I get:
Code:
FILE SYSTEM STATE IN SUPERBLOCK IS WRONG; FIX? yes

Do I need to run fsck with the backup superblock option or is there
some other option I should use. I have tried the format->analyze->read
option but that does not report any corrupt blocks.
Is it advisable to reinstall the OS??

rte
Last edited by Yogesh Sawant; 04-10-2011 at 11:40 AM.. Reason: added code tags
# 2  
Old 09-11-2005
I would suspect a bug in fsck and obtain the latest fsck patch. Using a backup superblock is certainly not indicated. Can you mount the fs anyway? Is this a ufs fs?

I think this happened to me once with a ufs fs and I was able to mount the fs anyway. Since I could mount the fs, then fsck is in error in suggesting the clean flag is wrong. fsck needs one routine to check the clean flag and a second routine to write the clean flag. If the first routine is buggy, fsck would loop like that. It forever thinks the clean flag is wrong and forever sets the clean flag correctly. I was pretty sure that was happening to me so I just ignored the situation.
# 3  
Old 09-13-2005
Yes!! my OS starts up normally and the fs gets mounted as usual.
It is only that when I run fsck I get this error. Even when I have
applied Sun Reccomended patch clusters on the machine this error
is showing up on not 1 but more than 1 machine.
# 4  
Old 09-14-2005
As I understand it if you run fsck on a file sytem you should always get this message when checking a mounted file system.


The flag is simply a "I know this file system is in a consistent state with no pending writes" flag which Solaris writes to it if it shuts down correctly. Then on bootup it knows if the file system in question was consistent the last time it was unmounted. If the flag is not set it knows it needs to check the filesystem before mounting.

When you mount the file system the falg is unset autmatically. So if you fsck a file system that is currently mounted you will always be asked this question. If you unmount the file system then unless it has not been checked after a last system crash (or something similar) then you will not be.
# 5  
Old 09-14-2005
I hope that no one is running "fsck -y" on a mounted filesystem. Yes, I would expect this result all the time if the filesystem is mounted. From the man page...
Quote:
The operating system buffers file system data. Running fsck on a mounted file system can cause the operating system's buffers to become out of date with respect to the disk. For this reason, the file system should be unmounted when fsck is used. If this is not possible, care should be taken that the system is quiescent and that it is rebooted immediately after fsck is run. Quite often, however, this will not be sufficient. A panic will probably occur if running fsck on a file system modifies the file system.
# 6  
Old 09-14-2005
Quote:
Originally Posted by Perderabo
I hope that no one is running "fsck -y" on a mounted filesystem. Yes, I would expect this result all the time if the filesystem is mounted.
Agreed. However we did have a post the other week about someone who had done 'rm /dev/*' Smilie so you never know.
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