jfs.rst 2.6 KB

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  1. ===========================================
  2. IBM's Journaled File System (JFS) for Linux
  3. ===========================================
  4. JFS Homepage: http://jfs.sourceforge.net/
  5. The following mount options are supported:
  6. (*) == default
  7. iocharset=name
  8. 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. resize=value
  14. 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. nointegrity
  20. 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. integrity(*)
  25. 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. errors=continue
  29. Keep going on a filesystem error.
  30. errors=remount-ro(*)
  31. Remount the filesystem read-only on an error.
  32. errors=panic
  33. Panic and halt the machine if an error occurs.
  34. uid=value
  35. Override on-disk uid with specified value
  36. gid=value
  37. Override on-disk gid with specified value
  38. umask=value
  39. Override on-disk umask with specified octal value. For
  40. directories, the execute bit will be set if the corresponding
  41. read bit is set.
  42. discard=minlen, discard/nodiscard(*)
  43. This enables/disables the use of discard/TRIM commands.
  44. The discard/TRIM commands are sent to the underlying
  45. block device when blocks are freed. This is useful for SSD
  46. devices and sparse/thinly-provisioned LUNs. The FITRIM ioctl
  47. command is also available together with the nodiscard option.
  48. The value of minlen specifies the minimum blockcount, when
  49. a TRIM command to the block device is considered useful.
  50. When no value is given to the discard option, it defaults to
  51. 64 blocks, which means 256KiB in JFS.
  52. The minlen value of discard overrides the minlen value given
  53. on an FITRIM ioctl().
  54. The JFS mailing list can be subscribed to by using the link labeled
  55. "Mail list Subscribe" at our web page http://jfs.sourceforge.net/