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Fsck -n on mounted FS - how unreliable ?
Post 302925702 by achenle on Tuesday 18th of November 2014 07:46:29 PM
11-18-2014
Quote:
And it's not just the cache that's the problem with a mounted file system - it's the fact that things are changing. Every file system check I'm aware of assumes the entire file system is static. And it pretty much has to be to ensure consistency. If there's some sort of required consistency between two or more items in the file system, if things are changing there's no way to know if there's an inconsistency because it's corrupt or because it's been changed. The fsck process can't look at the entire file system at one moment in time - it can only look at all the different parts of the file system in some sequence.
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LEARN ABOUT HPUX
umountall
mountall(1M) mountall(1M) NAME
mountall, umountall - mount and unmount multiple file systems SYNOPSIS
FStype] [file_system_table | FStype] DESCRIPTION
is used to mount file systems according to file_system_table. By default, is the file_system_table. If a dash is specified, reads file_system_table from the standard input; the standard input must be in the same format as the Before each file system is mounted, a check is done using (see fsck(1M)) to ensure that the file system is mountable. If the file system is not mountable, it is repaired by before the mount is attempted. causes all mounted file systems except the non-removable file systems such as to be unmounted. Options and recognize the following options: Specify the file system type (FStype) to be mounted or unmounted. Specify action on local file systems only. Specify action on remote file systems only. Send a signal to processes that have files opened. Attempt to mount all the unmounted file systems. This option will not perform the file system consistency check and repair. Perform the file system consistency check and repair on all unmounted file system. This option will not mount the file systems. DIAGNOSTICS
Error and warning messages may originate from or See fsck(1M), mount(1M), or fuser(1M) to interpret the error and warning messages. EXAMPLES
Mount all unmounted file systems listed in Mount all local file systems listed in Mount all remote file systems listed in Mount all local hfs file systems: Unmount all NFS file systems and kill any processes that have files opened in the file system: WARNINGS
especially with the option, should be used with extreme caution, because it can cause severe damage. The option may not be available in future releases. may not be effective with some cases of LOFS file systems. FILES
Static information about the file systems Mounted file system table SEE ALSO
fsck(1M), mount(1M), fuser(1M), mnttab(4), fstab(4), signal(2) mountall(1M)