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How do I defragmemt a partition on Linux?

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Operating Systems Linux How do I defragmemt a partition on Linux?
# 8  
Old 08-03-2007
Quote:
Originally Posted by Perderabo
A full fsck should not destroy a filesystem. I heard that fsck on ext3 is nasty. Reiser too? Seesh... those filesystems are broken and I would not use them until they work correctly. Veritas filesystems are journalled and extent-based. I have run a full fsck on many Veritas filesystems. There is nothing about journalled or extent-based filesystems that makes them inherently non-repairable. However, fsck does not defrag them, it only repairs damage.
I agree completely, there is indeed nothing in the concept which prevents it, only in implementation. I also have run many fscks on vxfs with DRL logs enabled and there has never been a destroyed filesystem as a result. likewise UFS with logging enabled.

I have (deliberately) done this on ext3 and reiser(can't remember which one ) and ended up with nothing good afterwards. I certainly would recommend not using them for now for this reason.
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LEARN ABOUT PLAN9

findfs

FINDFS(8)						       System Administration							 FINDFS(8)

NAME

       findfs - find a filesystem by label or UUID

SYNOPSIS

       findfs NAME=value

DESCRIPTION

       findfs  will  search the block devices in the system looking for a filesystem or partition with specified tag. The currently supported tags
       are:

       LABEL=<label>
	      Specifies filesystem label.

       UUID=<uuid>
	      Specifies filesystem UUID.

       PARTUUID=<uuid>
	      Specifies partition UUID. This partition identifier is supported for example for GUID  Partition	Table (GPT) partition tables.

       PARTLABEL=<label>
	      Specifies partition label (name). The partition labels are supported for example for GUID Partition Table  (GPT)	or  MAC  partition
	      tables.

       If the filesystem or partition is found, the device name will be printed on stdout.

       The complete overview about filesystems and partitions you can get for example by

	      lsblk --fs

	      partx --show <disk>

	      blkid

EXIT STATUS

	      0      success
	      1      label or uuid cannot be found
	      2      usage error, wrong number of arguments or unknown option

AUTHOR

       findfs was originally written by Theodore Ts'o <tytso@mit.edu> and re-written for the util-linux package by Karel Zak <kzak@redhat.com>.

ENVIRONMENT

       LIBBLKID_DEBUG=all
	      enables libblkid debug output.

SEE ALSO

       blkid(8), lsblk(8), partx(8)

AVAILABILITY

       The  findfs  command  is  part of the util-linux package and is available from Linux Kernel Archive <https://www.kernel.org/pub/linux/utils
       /util-linux/>.

util-linux							    March 2014								 FINDFS(8)