1=========================================== 2IBM's Journaled File System (JFS) for Linux 3=========================================== 4 5JFS Homepage: http://jfs.sourceforge.net/ 6 7The following mount options are supported: 8 9(*) == default 10 11iocharset=name 12 Character set to use for converting from Unicode to 13 ASCII. The default is to do no conversion. Use 14 iocharset=utf8 for UTF-8 translations. This requires 15 CONFIG_NLS_UTF8 to be set in the kernel .config file. 16 iocharset=none specifies the default behavior explicitly. 17 18resize=value 19 Resize the volume to <value> blocks. JFS only supports 20 growing a volume, not shrinking it. This option is only 21 valid during a remount, when the volume is mounted 22 read-write. The resize keyword with no value will grow 23 the volume to the full size of the partition. 24 25nointegrity 26 Do not write to the journal. The primary use of this option 27 is to allow for higher performance when restoring a volume 28 from backup media. The integrity of the volume is not 29 guaranteed if the system abnormally abends. 30 31integrity(*) 32 Commit metadata changes to the journal. Use this option to 33 remount a volume where the nointegrity option was 34 previously specified in order to restore normal behavior. 35 36errors=continue 37 Keep going on a filesystem error. 38errors=remount-ro(*) 39 Remount the filesystem read-only on an error. 40errors=panic 41 Panic and halt the machine if an error occurs. 42 43uid=value 44 Override on-disk uid with specified value 45gid=value 46 Override on-disk gid with specified value 47umask=value 48 Override on-disk umask with specified octal value. For 49 directories, the execute bit will be set if the corresponding 50 read bit is set. 51 52discard=minlen, discard/nodiscard(*) 53 This enables/disables the use of discard/TRIM commands. 54 The discard/TRIM commands are sent to the underlying 55 block device when blocks are freed. This is useful for SSD 56 devices and sparse/thinly-provisioned LUNs. The FITRIM ioctl 57 command is also available together with the nodiscard option. 58 The value of minlen specifies the minimum blockcount, when 59 a TRIM command to the block device is considered useful. 60 When no value is given to the discard option, it defaults to 61 64 blocks, which means 256KiB in JFS. 62 The minlen value of discard overrides the minlen value given 63 on an FITRIM ioctl(). 64 65The JFS mailing list can be subscribed to by using the link labeled 66"Mail list Subscribe" at our web page http://jfs.sourceforge.net/ 67