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Based on kernel version 3.16. Page generated on 2014-08-06 21:39 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/
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