Based on kernel version 3.19. Page generated on 2015-02-13 21:20 EST.
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: 6 (*) == default 7 8 iocharset=name Character set to use for converting from Unicode to 9 ASCII. The default is to do no conversion. Use 10 iocharset=utf8 for UTF-8 translations. This requires 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 25 integrity(*) Commit metadata changes to the journal. Use this option to 26 remount a volume where the nointegrity option was 27 previously specified in order to restore normal behavior. 28 29 errors=continue Keep going on a filesystem error. 30 errors=remount-ro(*) Remount the filesystem read-only on an error. 31 errors=panic Panic and halt the machine if an error occurs. 32 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 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 useful. 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 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/