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  man pages->Tru64 Unix man pages -> extendfs (8)              



NAME    [Toc]    [Back]

       extendfs - Extends UFS file systems

SYNOPSIS    [Toc]    [Back]

       /sbin/extendfs [-s  disk_blocks]  device_name

OPTIONS    [Toc]    [Back]

       Specifies  the total number of 512-byte blocks for the UFS
       file system.


              This value is not an increment. Specifying a  value
              with this option does not increment the file system
              by that value; rather, it is the new  size  of  the
              file system.

DESCRIPTION    [Toc]    [Back]

       Use  the extendfs command to increase the storage space in
       a UFS file system.  The file system must  not  be  mounted
       when  you perform this operation.  To extend a mounted (in
       use) UFS file system, use the mount command with the -u -o
       extend mnt_point parameters.

       The  procedure  for  increasing the storage space of a UFS
       file system is as follows: Look at  the  contents  of  the
       /etc/fstab  file  to identify the disk partition that maps
       to the file system.  Ensure that there is available  storage
  space on the target disk as follows: If LSM is in use
       on your system, use LSM commands to increase the  size  of
       the LSM volume as described in the Logical Storage Manager
       guide.  If LSM is not in  use  on  your  system,  use  the
       disklabel  command or the diskconfig graphical user interface
 to check the current size and use  of  partitions  on
       the  disk.  If there is adequate space on an adjacent partition,
 use the disklabel command  to  write  the  current
       label  to a file as follows: # disklabel -r dsk4 > d4label
       Edit the disklabel file to change the size of  the  partition
  on which your UFS file system resides.  Increase the
       number of disk blocks on the partition  and  decrease  the
       disk block size of the adjacent partition by an equivalent
       number.  Use the disklabel command with the -R  option  to
       write  the  revised  label  to  the raw disk as follows: #
       disklabel -R /dev/rdisk/dsk4 d4label When the  disk  label
       is revised, extend the file system using the extendfs command.
  You can either use the full  extent  of  the  newly
       sized  partition or extend the file system in stages.  The
       following example commands show both methods.   To  extend
       the  file system to use all the available space, you specify
 the disk partition on which the file  system  resides,
       as follows: #  extendfs /dev/disk/dsk4g To extend the file
       system to use only part of the available space, you  specify
  the  total  number of disk blocks to be used, as follows:
 #  extendfs -s 300000 /dev/disk/dsk4g

              The remainder of the extended partion  is  reserved
              for future use.

       You  can  extend a file system as many times as necessary,
       up to the physical limit of the storage device.   When  no
       more  space  is  available on the storage device, you must
       back up the file system using the dump command and restore
       the  file  system to a storage device that has more available

       Once you have extended a file system, the operation cannot
       be reversed except by a back up and restore operation. Use
       the dump command to back up the file system.  You can then
       reset  the  partition  sizes manually and restore the file
       system to the storage device.

ERRORS    [Toc]    [Back]

       The disklabel command produces output similar to  that  of
       the  newfs  command.  If a list of disk blocks is not displayed
 on the terminal, the command  has  failed.   Verify
       the  partition settings and the mount status of the target
       file system.

       The disklabel command does not permit you to  overwrite  a
       partition if it is in use.  Refer to the disklabel(8) reference
 page for more information on label errors.

FILES    [Toc]    [Back]

       Specifies the command path.


       diskconfig(8), disklabel(8), mount(8), and fstab(4).

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