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- IBM's Journaled File System (JFS) for Linux
- JFS Homepage: http://jfs.sourceforge.net/
- The following mount options are supported:
- (*) == default
- iocharset=name Character set to use for converting from Unicode to
- ASCII. The default is to do no conversion. Use
- iocharset=utf8 for UTF-8 translations. This requires
- CONFIG_NLS_UTF8 to be set in the kernel .config file.
- iocharset=none specifies the default behavior explicitly.
- resize=value Resize the volume to <value> blocks. JFS only supports
- growing a volume, not shrinking it. This option is only
- valid during a remount, when the volume is mounted
- read-write. The resize keyword with no value will grow
- the volume to the full size of the partition.
- nointegrity Do not write to the journal. The primary use of this option
- is to allow for higher performance when restoring a volume
- from backup media. The integrity of the volume is not
- guaranteed if the system abnormally abends.
- integrity(*) Commit metadata changes to the journal. Use this option to
- remount a volume where the nointegrity option was
- previously specified in order to restore normal behavior.
- errors=continue Keep going on a filesystem error.
- errors=remount-ro(*) Remount the filesystem read-only on an error.
- errors=panic Panic and halt the machine if an error occurs.
- uid=value Override on-disk uid with specified value
- gid=value Override on-disk gid with specified value
- umask=value Override on-disk umask with specified octal value. For
- directories, the execute bit will be set if the corresponding
- read bit is set.
- discard=minlen This enables/disables the use of discard/TRIM commands.
- discard The discard/TRIM commands are sent to the underlying
- nodiscard(*) block device when blocks are freed. This is useful for SSD
- devices and sparse/thinly-provisioned LUNs. The FITRIM ioctl
- command is also available together with the nodiscard option.
- The value of minlen specifies the minimum blockcount, when
- a TRIM command to the block device is considered useful.
- When no value is given to the discard option, it defaults to
- 64 blocks, which means 256KiB in JFS.
- The minlen value of discard overrides the minlen value given
- on an FITRIM ioctl().
- The JFS mailing list can be subscribed to by using the link labeled
- "Mail list Subscribe" at our web page http://jfs.sourceforge.net/
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