Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

jfs_logdump(8) [centos man page]

jfs_logdump(8)						  JFS utility - journal log dump					    jfs_logdump(8)

NAME
jfs_logdump - dump a JFS formatted device's journal log SYNOPSIS
jfs_logdump [ -a ] device DESCRIPTION
jfs_logdump dumps the contents of the journal log from the specified JFS formatted device into output file ./jfslog.dmp. device is the special file name corresponding to the actual device from which the journal log will be dumped (e.g. /dev/hdb1 ). jfs_logdump must be run as root. OPTIONS
-a Dump the entire contents of the journal log instead of just the committed transactions since the last synch point. EXAMPLE
Dump the entire JFS journal log from the 3rd partition of the 2nd hard disk into ./jfslog.dmp: jfs_logdump -a /dev/hdb3 REPORTING BUGS
If you find a bug in JFS or jfs_logdump, 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 jfs_logdump error messages and the complete output of running jfs_fsck with the -v option on the JFS device. SEE ALSO
jfs_fsck(8), jfs_mkfs(8), jfs_fscklog(8), jfs_tune(8), jfs_debugfs(8) AUTHORS
Barry Arndt (barndt@us.ibm.com) William Braswell, Jr. jfs_logdump is maintained by IBM. See the JFS project web site for more details: http://jfs.sourceforge.net/ October 29, 2002 jfs_logdump(8)

Check Out this Related Man Page

jfs_mkfs(8)						     JFS file system creation						       jfs_mkfs(8)

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 exter- nal 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. SEE ALSO
mkfs(8), jfs_fsck(8), jfs_fscklog(8), jfs_tune(8), jfs_logdump(8), jfs_debugfs(8) 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)

Featured Tech Videos