Content-type: text/html Manpage of mkfs.jfs

mkfs.jfs

Section: JFS file system creation (8)
Updated: September 5, 2002
Index Return to Main Contents

 

NAME

mkfs.jfs - create a JFS formatted partition

 

SYNOPSIS

mkfs.jfs [options] device

 

DESCRIPTION

mkfs.jfs is used to create (format) a JFS partition. mkfs.jfs 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.

The default block size is 4096.

 

WARNING

mkfs.jfs will destroy all data on the specified device!

 

OPTIONS

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

-j journal_device
(Experimental) 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
(Experimental) 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
mkfs.jfs -J journal_dev external-journal
Attach the external journal to the file system being created by using the command
mkfs.jfs -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 mkfs.jfs 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":

mkfs.jfs -L JFS_hdb3 /dev/hdb3

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

mkfs.jfs -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:

mkfs.jfs -j /dev/hdb3 /dev/hda4

 

REPORTING BUGS

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

http://oss.software.ibm.com/jfs

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

 

SEE ALSO

mkfs(8), fsck.jfs(8), jfs_tune(8), logdump(8), logredo(8), xchkdmp(8), xpeek(8)

 

AUTHORS

Barry Arndt  (barndt@us.ibm.com)
William Braswell, Jr.
mkfs.jfs is maintained by IBM. 
See the JFS project web site for more details:
http://oss.software.ibm.com/jfs/

 

Index

NAME
SYNOPSIS
DESCRIPTION
WARNING
OPTIONS
EXAMPLES
REPORTING BUGS
SEE ALSO
AUTHORS
This document was created by man2html, using the manual pages.
Time: 21:27:22 GMT, October 09, 2002