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Full Discussion: Fsck -n on mounted FS - how unreliable ?
Operating Systems AIX Fsck -n on mounted FS - how unreliable ? Post 302925541 by achenle on Monday 17th of November 2014 07:54:59 PM
Old 11-17-2014
Agreed.

Running fsck on a mounted filesystem is a worthless task. Unless you're lucky and it shows no errors - something I've never seen the few times I've witnessed an fsck of a mounted file system.

Because an indication of corruption isn't meaningful at all for a mounted file system.

If you're worried about corruption, you umount the filesystem and check it.
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LEARN ABOUT REDHAT

logdump

logdump(8)						  JFS utility - journal log dump						logdump(8)

NAME

       logdump - dump a JFS formatted device's journal log

SYNOPSIS

       logdump [ -a ] device

DESCRIPTION

       logdump dumps the contents of the journal log from the specified JFS formatted device into output file ./jfslog.dmp.

       device is the special file name corresponding to the actual device from which the journal log will be dumped (e.g.  /dev/hdb1 ).

       logdump must be run as root.

OPTIONS

       -a     Dump the entire contents of the journal log instead of just the committed transactions since the last synch point.

EXAMPLE

       Dump the entire JFS journal log from the 3rd partition of the 2nd hard disk into ./jfslog.dmp:

	      logdump -a /dev/hdb3

REPORTING BUGS

       If you find a bug in JFS or logdump, please report it via the bug tracking system ("Report Bugs" section) of the JFS project web site:
       http://oss.software.ibm.com/jfs

       Please  send  as  much  pertinent information as possible, including any logdump error messages and the complete output of running fsck.jfs
       with the -v option on the JFS device.

SEE ALSO

       xchklog(8), xchkdmp(8), mkfs.jfs(8), fsck.jfs(8), logredo(8), xpeek(8)

AUTHORS

       Barry Arndt  (barndt@us.ibm.com)
       William Braswell, Jr.

       logdump is maintained by IBM.
       See the JFS project web site for more details:
       http://oss.software.ibm.com/jfs

								 October 10, 2001							logdump(8)
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