reiserfstune man page on Archlinux

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       reiserfstune - The tunning tool for the ReiserFS filesystem.

       reiserfstune  [	-f  ] [ -h | --help ] [ -j | --journal-device FILE ] [
       --no-journal-available ] [ --journal-new-device FILE ]  [  --make-jour‐
       nal-standard  ] [ -s | --journal-new-size N ] [ -o | --journal-new-off‐
       set N ] [ -t | --max-transaction-size N ] [ -b | --add-badblocks file ]
       [ -B | --badblocks file ] [ -u | --uuid UUID ] [ -l | --label LABEL ] [
       -c | --check-interval interval-in-days ]	 [  -C	|  --time-last-checked
       timestamp  ]  [ -m | --max-mnt-count count ] [ -M | --mnt-count count ]

       reiserfstune is used for tuning the ReiserFS. It can change two journal
       parameters  (the journal size and the maximum transaction size), and it
       can move the journal's location to a new specified block	 device.  (The
       old  ReiserFS's	journal may be kept unused, or discarded at the user's
       option.) Besides that reiserfstune can store the bad block list to  the
       ReiserFS	 and  set  UUID	 and  LABEL.  Note: At the time of writing the
       relocated journal was implemented for a special	release	 of  ReiserFS,
       and was not expected to be put into the mainstream kernel until approx‐
       imately Linux 2.5.  This means that if you have the  stock  kernel  you
       must  apply  a special patch. Without this patch the kernel will refuse
       to mount the newly modified file system.	 We will charge $25 to explain
       this to you if you ask us why it doesn't work.

       Perhaps	the  most  interesting	application of this code is to put the
       journal on a solid state disk.

       device is the special file corresponding to the newly  specified	 block
	      device  (e.g  /dev/hdXX  for IDE disk partition or /dev/sdXX for
	      the SCSI disk partition).

       -h | --help
	      Print usage information and exit.

       -j | --journal-device FILE
	      FILE is the file name of the block device the  file  system  has
	      the  current journal (the one prior to running reiserfstune) on.
	      This option is required when the journal is already on  a	 sepa‐
	      rate  device  from  the  main  data  device  (although it can be
	      avoided with --no-journal-available). If you don't specify jour‐
	      nal  device by this option, reiserfstune suppose that journal is
	      on main device.

	      allows reiserfstune to continue when the current journal's block
	      device is no longer available.  This might happen if a disk goes
	      bad and you remove it (and run fsck).

       --journal-new-device FILE
	      FILE is the file name of the block device which will contain the
	      new  journal  for	 the  file  system. If you don't specify this,
	      reiserfstune  supposes   that   journal	device	 remains   the

	-s | --journal-new-size N
	      N	 is the size parameter for the new journal. When journal is to
	      be on a separate device - its size defaults to number of	blocks
	      that device has. When journal is to be on the same device as the
	      filesytem - its size defaults to amount of blocks allocated  for
	      journal by mkreiserfs when it created the filesystem. Minimum is
	      513 for both cases.

	-o | --journal-new-offset N
	      N is an offset in blocks where journal  will  starts  from  when
	      journal  is  to  be  on  a separate device. Default is 0. Has no
	      effect when journal is to be on the same device as the  filesys‐
	      tem.   Most  users  have no need to use this feature.  It can be
	      used when you want the journals  from  multiple  filesystems  to
	      reside  on the same device, and you don't want to or cannot par‐
	      tition that device.

	-t | --maximal-transaction-size N
	      N is the maximum transaction size parameter for the new journal.
	      The  default,  and max possible, value is 1024 blocks. It should
	      be less than half the size of the journal.  If  specifed	incor‐
	      rectly, it will be adjusted.

	-b | --add-badblocks file
	      File  is	the  file  name	 of the file that contains the list of
	      blocks to be marked as bad on the fs. The list is added  to  the
	      fs list of bad blocks.

	-B | --badblocks file
	      File  is	the  file  name	 of the file that contains the list of
	      blocks to be marked as bad on the fs. The bad block list on  the
	      fs  is cleared before the list specified in the File is added to
	      the fs.

       -f | --force
	      Normally reiserfstune will refuse to change a journal of a  file
	      system  that  was	 created  before this journal relocation code.
	      This is because if you change the journal, you  cannot  go  back
	      (without	special option --make-journal-standard) to an old ker‐
	      nel that lacks this feature and be able to use  your  filesytem.
	      This  option  forces  it to do that. Specified more than once it
	      allows to avoid asking for confirmation.

	      As it was mentioned above, if your file system has  non-standard
	      journal,	it  can	 not  be mounted on the kernel without journal
	      relocation code. The thing can be changed, the only condition is
	      that there is reserved area on main device of the standard jour‐
	      nal size 8193 blocks  (it will be so for instance if you convert
	      standard journal to non-standard). Just specify this option when
	      you relocate journal back, or without relocation if you  already
	      have it on main device.

       -u | --uuid UUID
	      Set   the	  universally	unique	 identifier  (	UUID  ) of the
	      filesystem to UUID (see also uuidgen(8)). The  format   of   the
	      UUID   is	  a  series  of	 hex  digits  separated	 by  hypthens,
	      like  this: "c1b9d5a2-f162-11cf-9ece-0020afc76f16".

       -l | --label LABEL
	      Set  the	volume	label  of  the filesystem.  LABEL  can	be  at
	      most  16	characters  long;  if it is longer than 16 characters,
	      reiserfstune will truncate it.

       -c | --check-interval interval-in-days
	      Adjust the maximal time between two filesystem checks.  A	 value
	      of  "disable"  will disable the time-dependent checking. A value
	      of "default" will restore the compile-time default.

	      It is strongly recommended that either  -m  (mount-count	depen‐
	      dent)  or -c (time-dependent) checking be enabled to force peri‐
	      odic full fsck.reiserfs(8) checking of the  filesystem.  Failure
	      to  do  so  may lead to filesystem corruption (due to bad disks,
	      cables, memory, or  kernel  bugs)	 going	unnoticed,  ultimately
	      resulting in data loss or corruption.

       -C | --time-last-checked timestamp
	      Set  the	time  the filesystem was last checked using fsck.reis‐
	      erfs. This can be useful in scripts which use a  Logical	Volume
	      Manager  to make a consistent snapshot of a filesystem, and then
	      check the filesystem during off hours to	make  sure  it	hasn't
	      been  corrupted due to hardware problems, etc. If the filesystem
	      was clean, then this option can be used to set the last  checked
	      time on the original filesystem. The format of time-last-checked
	      is the international date format, with an optional  time	speci‐
	      fier,  i.e.   YYYYMMDD[HH[MM[SS]]].  The	keyword	 now  is  also
	      accepted, in which case the last checked time will be set to the
	      current time.

       -m | --max-mnt-count max-mount-count
	      Adjust the number of mounts after which the filesystem  will  be
	      checked by fsck.reiserfs(8).  If max-mount-count	is  "disable",
	      the  number  of  times  the filesystem is mounted will be disre‐
	      garded by fsck.reiserfs(8) and the kernel. A value of  "default"
	      will restore the compile-time default.

	      Staggering  the  mount-counts  at which filesystems are forcibly
	      checked will avoid all filesystems being	checked	 at  one  time
	      when using journaled filesystems.

	      You  should  strongly  consider  the  consequences  of disabling
	      mount-count-dependent  checking  entirely.   Bad	disk   drives,
	      cables,  memory,	and kernel bugs could all corrupt a filesystem
	      without marking the filesystem dirty or in error.	  If  you  are
	      using  journaling on your filesystem, your filesystem will never
	      be marked dirty, so it will not normally be checked.  A filesys‐
	      tem error detected by the kernel will still force an fsck on the
	      next reboot, but it may already be too late to prevent data loss
	      at that point.

	      This  option  requires  a kernel which supports incrementing the
	      count on each mount. This feature has not been incorporated into
	      kernel versions older than 2.6.25.

	      See also the -c option for time-dependent checking.

       -M | --mnt-count count
	      Set the number of times the filesystem has been mounted.	If set
	      to a greater value than the max-mount-counts  parameter  set  by
	      the -m option, fsck.reiserfs(8) will check the filesystem at the
	      next reboot.

       1. You have ReiserFS on /dev/hda1, and you wish to have it working with
       its journal on the device /dev/journal

	      boot kernel patched with special "relocatable journal support" patch
	      reiserfstune /dev/hda1 --journal-new-device /dev/journal -f
	      mount /dev/hda1 and use.
	      You would like to change max transaction size to 512 blocks
	      reiserfstune -t 512 /dev/hda1
	      You would like to use your file system on another kernel that doesn't
	      contain relocatable journal support.
	      umount /dev/hda1
	      reiserfstune /dev/hda1 -j /dev/journal --journal-new-device /dev/hda1 --make-journal-standard
	      mount /dev/hda1 and use.

       2. You would like to have ReiserFS on /dev/hda1 and to be able to
       switch between different journals including journal located on the
       device containing the filesystem.

	      boot kernel patched with special "relocatable journal support" patch
	      mkreiserfs /dev/hda1
	      you got solid state disk (perhaps /dev/sda, they typically look like scsi disks)
	      reiserfstune --journal-new-device /dev/sda1 -f /dev/hda1
	      Your scsi device dies, it is three in the morning, you have an extra IDE device
	      lying around
	      reiserfsck --no-journal-available /dev/hda1
	      reiserfsck --rebuild-tree --no-journal-available /dev/hda1
	      reiserfstune --no-journal-available --journal-new-device /dev/hda1 /dev/hda1
	      using /dev/hda1 under patched kernel

       This  version  of  reiserfstune	has  been  written by Vladimir Demidov
       <> and Edward Shishkin <>.

       Please	report	 bugs	to   the   ReiserFS   developers    <reiserfs->,  providing as much information as possible--your
       hardware, kernel, patches, settings, all printed	 messages;  check  the
       syslog file for any related information.

       reiserfsck(8), debugreiserfs(8), mkreiserfs(8)

Reiserfsprogs-3.6.24		 January 2009		       REISERFSTUNE(8)

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