| IBM's Journaled File System (JFS) for Linux |
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| JFS Homepage: http://jfs.sourceforge.net/ |
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| The following mount options are supported: |
| (*) == default |
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| 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. |
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| 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. |
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| 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. |
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| 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. |
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| 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(). |
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| The JFS mailing list can be subscribed to by using the link labeled |
| "Mail list Subscribe" at our web page http://jfs.sourceforge.net/ |