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   dumpe2fs    ( 8 )

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Имя (Name)

dumpe2fs - dump ext2/ext3/ext4 file system information

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Синопсис (Synopsis)

dumpe2fs [ -bfghixV ] [ -o superblock=superblock ] [ -o blocksize=blocksize ] device

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Описание (Description)

dumpe2fs prints the super block and blocks group information for the file system present on device.

Note: When used with a mounted file system, the printed information may be old or inconsistent.

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Параметры (Options)

-b     print the blocks which are reserved as bad in the file
              system.

       -o superblock=superblock
              use the block superblock when examining the file system.
              This option is not usually needed except by a file system
              wizard who is examining the remains of a very badly
              corrupted file system.

       -o blocksize=blocksize
              use blocks of blocksize bytes when examining the file
              system.  This option is not usually needed except by a
              file system wizard who is examining the remains of a very
              badly corrupted file system.

       -f     force dumpe2fs to display a file system even though it may
              have some file system feature flags which dumpe2fs may not
              understand (and which can cause some of dumpe2fs's display
              to be suspect).

       -g     display the group descriptor information in a machine
              readable colon-separated value format.  The fields
              displayed are the group number; the number of the first
              block in the group; the superblock location (or -1 if not
              present); the range of blocks used by the group
              descriptors (or -1 if not present); the block bitmap
              location; the inode bitmap location; and the range of
              blocks used by the inode table.

       -h     only display the superblock information and not any of the
              block group descriptor detail information.

       -i     display the file system data from an image file created by
              e2image, using device as the pathname to the image file.

       -m     If the mmp feature is enabled on the file system, check if
              device is in use by another node, see e2mmpstatus(8) for
              full details.  If used together with the -i option, only
              the MMP block information is printed.

       -x     print the detailed group information block numbers in
              hexadecimal format

       -V     print the version number of dumpe2fs and exit.

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Статус выхода (Exit)

dumpe2fs exits with a return code of 0 if the operation completed without errors. It will exit with a non-zero return code if there are any errors, such as problems reading a valid superblock, bad checksums, or if the device is in use by another node and -m is specified.

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Ошибки (баги) (Bugs)

You may need to know the physical file system structure to understand the output.

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