free inode Post: 302396360

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Homework and Emergencies Homework & Coursework Questions free inode Post 302396360 by methyl on Thursday 18th of February 2010 08:37:21 AM

02-18-2010

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The book "Design of the Unix Operating System" by Maurice J. Bach (1986) largely describes AT&T Unix System V release 2 (1984).

This book pre-dates modern journalling filesystems such as Veritas.

Maybe this is what you mean:

After say a power failure or a system crash it is possible on an old UFS filesystem to get the master block allocation table out of step with the inode table. The unix program "fsck" is designed to repair this situation and this program can re-create files in the "lost+found" directory without knowing the correct name of the file. In this case the inode table does not contain the name of the file but there are disc blocks allocated to that inode.

I this is not what you are looking for, please accurately type out the paragraph which contains the sentence.

methyl

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clri

CLRI(8) 						    BSD System Manager's Manual 						   CLRI(8)

NAME

     clri -- clear an inode

SYNOPSIS

     clri special_device inode_number ...

DESCRIPTION

     Clri is obsoleted for normal file system repair work by fsck(8).

     Clri zeros out the inodes with the specified inode number(s) on the filesystem residing on the given special_device.  The fsck(8) utility is
     usually run after clri to reclaim the zero'ed inode(s) and the blocks previously claimed by those inode(s).  Both read and write permission
     are required on the specified special_device.

     The primary purpose of this routine is to remove a file which for some reason is not being properly handled by fsck(8).  Once removed, it is
     anticipated that fsck(8) will be able to clean up the resulting mess.

SEE ALSO

     fsck(8), fsdb(8), icheck(8), ncheck(8)

BUGS

     If the file is open, the work of clri will be lost when the inode is written back to disk from the inode cache.

4th Berkeley Distribution					  April 19, 1994					 4th Berkeley Distribution