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Converting Rootvg Filesystems From jfs to jfs2ByAbinash Sharma– April 15, 2012Posted in: AIX

This procedure below allows you to take a mksysb of your JFS system and restore the mksysb such that the systemcomes up as JFS2 .

Task 1: Run mkszfile to create a new image.data file.

$mkszfile

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Converting Rootvg Filesystems From jfs to jfs2 - web manual http://www.web-manual.net/aix/converting-rootvg-from-jfs-to-jfs2/

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Note : The /image.data file contains details about volume groups, logical volumes, file systems, paging space,and physical volumes. This information is included in the backup for future use by the installation process.

Task 2: Edit the /image.data file to create JFS2 filesystems . We edited each of the fs_datastanzas converting.

fs_data:FS_NAME= /optFS_SIZE= 131072FS_MIN_SIZE= 12320FS_LV= /dev/hd10optFS_FS= 512FS_NBPI= 4096FS_COMPRESS= noFS_BF= falseFS_AGSIZE= 8

TO

fs_data:FS_NAME= /optFS_SIZE= 131072FS_MIN_SIZE= 12320FS_LV= /dev/hd10optFS_JFS2_BS= 4096FS_JFS2_SPARSE= yesFS_JFS2_INLINELOG= noFS_JFS2_SIZEINLINELOG= 0

We edited each jfs lv_data stanzas , changing “TYPE = jfs” to “TYPE = jfs2″. Also edit the jfslog to be TYPE= jfs2log.

lv_data:VOLUME_GROUP= rootvgLV_SOURCE_DISK_LIST= hdisk3 hdisk0LV_IDENTIFIER= 000aac4c0000d60000000133a66711e2.1LOGICAL_VOLUME= /varVG_STAT= active/complete

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TYPE= jfs2

Task 3. Take a back up of /etc/filesystems and edit /etc/filesystems and for each jfs filesystemin rootvg, change “jfs” to “jfs2″ in the vfs line. Check that each filesystem has options = rw.

/:dev = /dev/hd4vfs = jfs2log = /dev/hd8mount = automaticcheck = falsetype = bootfsvol = rootfree = trueaccount = trueoptions = rw/home:dev = /dev/hd1vfs = jfs2log = /dev/hd8mount = truecheck = truefree = falseaccount = trueoptions = rw/usr:dev = /dev/hd2vfs = jfs2log = /dev/hd8mount = automaticcheck = falsetype = bootfsfree = falseaccount = trueoptions = rw

Task 4. Create a mksysb backup using existing image.data file.

mksysb -e /mksysb/`hostname`.mksysb

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Task 5. Finally restore mksysb to an another disk and reboot the server.

alt_disk_install -d /mksysb/webmanual.mksysb hdisk3

You might want to read these post also:

Convert Non Rootvg Filesystems From JFS To JFS2chfs: 0506-908 Cannot reduce size of file system ( JFS vs JFS2 filesytems )Can not extend a JFS file system with nbpi = 16384Restore or Install AIX with a mksysb image using NIMMigration of AIX 6.1 mksysb image to AIX 7.1 and creation of NIM mksysb resource using using NIM (nimadm )

Tags: AIX, JFS, JFS2, mksysb, mkszfile

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