Ubuntu Manpage: jfs_mkfs - create a JFS formatted partition

NAME

       jfs_mkfs - create a JFS formatted partition

SYNOPSIS

       jfs_mkfs [options] device [ blocks ]

DESCRIPTION

       jfs_mkfs is used to create (format) a JFS partition.  jfs_mkfs must be run as root.

       device  is  the special file name corresponding to the actual device (e.g. /dev/hdb1) on which a JFS file
       system and/or JFS journal will be created.  blocks is the number of  blocks  to  be  used  for  the  file
       system.  If omitted, jfs_mkfs automatically figures the file system size.

       The default block size is 4096.

WARNING

       jfs_mkfs will destroy all data on the specified device!

OPTIONS

-c Check the device for bad blocks before building the file system.

-j journal_device
Create the external JFS journal on journal_device , create the JFS file system on device , and
attach the external journal to the file system.

-J journal-options
Create the JFS journal on its own device or attach an external JFS journal to the JFS file system
using options specified on the command-line. The following journal options are supported:

journal_dev
Create an external JFS journal on the given device.

device=external-journal
Attach an existing external JFS journal located on external-journal to the JFS file
system that will be created on device. The external journal must already have been
created using the command

jfs_mkfs -J journal_dev external-journal

Attach the external journal to the file system being created by using the command

jfs_mkfs -J device=external-journal device

Instead of specifying a device name directly, external-journal can also be specified
by either LABEL=label or UUID=UUID to locate the external journal by either the volume
label or UUID stored in the JFS external log superblock at the start of the journal.
Use jfs_tune(8) to display a journal device's volume label and UUID. (See the -l, -L,
and -U options of jfs_tune(8).)

Only one of the journal_dev or device= options can be given per jfs_mkfs issuance.

-L volume_label
Set the volume label for the newly formatted device.

If -L volume_label is used along with -J journal_device, the volume label of the specified
external journal device will be set to volume_label. Otherwise, the volume label of the JFS file
system will be set to volume_label.

-O Provide case-insensitive support for compatibility with OS/2.

-q Quiet execution - do not ask for confirmation before creating the file system.

-s log_size
Set the log size (in megabytes) of the inline log. If the -s option is not used, the default log
size is 0.4% of the aggregate size.

-V Print version information and exit (regardless of any other chosen options).

EXAMPLES

       Format 3rd partition on 2nd hard disk with the volume label "JFS_hdb3":

              jfs_mkfs -L JFS_hdb3 /dev/hdb3

       Format 5th partition on 1st hard disk, verifying each block created:

              jfs_mkfs -c /dev/hda5

       Format 3rd partition on 2nd hard disk as external journal, format 4th partition on 1st hard disk  as  JFS
       file system, and attach the external journal to the file system:

              jfs_mkfs -j /dev/hdb3 /dev/hda4

REPORTING BUGS

       If  you  find  a  bug  in  JFS  or  jfs_mkfs, please report it via the bug tracking system ("Report Bugs"
       section) of the JFS project web site:
       http://jfs.sourceforge.net/

       Please send as much pertinent information as possible including any error messages resulting from running
       jfs_mkfs.

AUTHORS

       Barry Arndt  (barndt@us.ibm.com)
       William Braswell, Jr.

       jfs_mkfs is maintained by IBM.
       See the JFS project web site for more details:
       http://jfs.sourceforge.net/

                                                  March 9, 2005                                      jfs_mkfs(8)