projects / mirror_ubuntu-zesty-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | IBM's Journaled File System (JFS) for Linux |
| 2 | ||
| 3 | JFS Homepage: http://jfs.sourceforge.net/ | |
| 4 | ||
| 5 | The following mount options are supported: | |
| b40c2e66 | 6 | (*) == default |
| 1da177e4 LT |
7 | |
| 8 | iocharset=name Character set to use for converting from Unicode to | |
| 9 | ASCII. The default is to do no conversion. Use | |
| 4de151d8 | 10 | iocharset=utf8 for UTF-8 translations. This requires |
| 1da177e4 LT |
11 | CONFIG_NLS_UTF8 to be set in the kernel .config file. |
| 12 | iocharset=none specifies the default behavior explicitly. | |
| 13 | ||
| 14 | resize=value Resize the volume to <value> blocks. JFS only supports | |
| 15 | growing a volume, not shrinking it. This option is only | |
| 16 | valid during a remount, when the volume is mounted | |
| 17 | read-write. The resize keyword with no value will grow | |
| 18 | the volume to the full size of the partition. | |
| 19 | ||
| 20 | nointegrity Do not write to the journal. The primary use of this option | |
| 21 | is to allow for higher performance when restoring a volume | |
| 22 | from backup media. The integrity of the volume is not | |
| 23 | guaranteed if the system abnormally abends. | |
| 24 | ||
| b40c2e66 TR |
25 | integrity(*) Commit metadata changes to the journal. Use this option to |
| 26 | remount a volume where the nointegrity option was | |
| 1da177e4 LT |
27 | previously specified in order to restore normal behavior. |
| 28 | ||
| 29 | errors=continue Keep going on a filesystem error. | |
| b40c2e66 | 30 | errors=remount-ro(*) Remount the filesystem read-only on an error. |
| 1da177e4 LT |
31 | errors=panic Panic and halt the machine if an error occurs. |
| 32 | ||
| ba863a00 DK |
33 | uid=value Override on-disk uid with specified value |
| 34 | gid=value Override on-disk gid with specified value | |
| 35 | umask=value Override on-disk umask with specified octal value. For | |
| 36 | directories, the execute bit will be set if the corresponding | |
| 37 | read bit is set. | |
| 38 | ||
| b40c2e66 TR |
39 | discard=minlen This enables/disables the use of discard/TRIM commands. |
| 40 | discard The discard/TRIM commands are sent to the underlying | |
| 41 | nodiscard(*) block device when blocks are freed. This is useful for SSD | |
| 42 | devices and sparse/thinly-provisioned LUNs. The FITRIM ioctl | |
| 43 | command is also available together with the nodiscard option. | |
| 44 | The value of minlen specifies the minimum blockcount, when | |
| 45 | a TRIM command to the block device is considered usefull. | |
| 46 | When no value is given to the discard option, it defaults to | |
| 47 | 64 blocks, which means 256KiB in JFS. | |
| 48 | The minlen value of discard overrides the minlen value given | |
| 49 | on an FITRIM ioctl(). | |
| 50 | ||
| 1da177e4 LT |
51 | The JFS mailing list can be subscribed to by using the link labeled |
| 52 | "Mail list Subscribe" at our web page http://jfs.sourceforge.net/ |