Create jfs2 logical volume on AIX

How to create a jfs2 logical volume on AIX?

First, you need to know:

• Which volume group you’re going to create the LV. In our case ‘newvg’

[root@aix:/] lsvg -o
rootvg
newvg

• Volume group PP size. In our case ‘4MB’

[root@aix:/] lsvg newvg|grep "PP SIZE:"
VG STATE:           active                   PP SIZE:        4 megabyte(s)

Now, let’s create the LV named ‘newlv’ with size 8 LPs:

[root@aix:/] mklv -t jfs2 -y newlv newvg 8
newlv

Let’s check logical volume newlv:

[root@aix:/] lsvg -l newvg
newvg:
LV NAME   TYPE   LPs  PPs  PVs    LV STATE     MOUNT POINT
newlv     jfs2    8   8    1    closed/syncd     N/A

[root@aix:/] lslv newlv
LOGICAL VOLUME:     newlv                  VOLUME GROUP:   newvg
LV IDENTIFIER:      000fd1bb0000d4000000015988de0d0f.1 PERMISSION:     read/write
VG STATE:           active/complete        LV STATE:       closed/syncd
TYPE:               jfs2                   WRITE VERIFY:   off
MAX LPs:            512                    PP SIZE:        4 megabyte(s)
COPIES:             1                      SCHED POLICY:   parallel
LPs:                8                      PPs:            8
STALE PPs:          0                      BB POLICY:      relocatable
INTER-POLICY:       minimum                RELOCATABLE:    yes
INTRA-POLICY:       middle                 UPPER BOUND:    1024
MOUNT POINT:        N/A                    LABEL:          None
DEVICE UID:         0                      DEVICE GID:     0
DEVICE PERMISSIONS: 432
MIRROR WRITE CONSISTENCY: on/ACTIVE
EACH LP COPY ON A SEPARATE PV ?: yes
Serialize IO ?:     NO
INFINITE RETRY:     no
DEVICESUBTYPE:      DS_LVZ
COPY 1 MIRROR POOL: None
COPY 2 MIRROR POOL: None
COPY 3 MIRROR POOL: None

Create a jfs2 file system on AIX:

First, you need to know:
– volume group?
– Type of filesystem (jfs, jfs2)?
– Mount point to mount the filesystem?

There are two ways to create filesystems on AIX:
1- Over an existing created logical volume (In this example, we’ll create a new filesystem over logical volume ‘newlv’, size 32M, mounted on /newfs, type jfs2.)

[root@aix:/] crfs -v jfs2 -A yes -d newlv -m /newfs
File system created successfully.
32560 kilobytes total disk space.
New File System size is 65536

NOTE: '-A yes' means to mount automatically the FS

2- Or creating a new LV (In this example we’ll create a new filesystem mounted on /newfs2, size 64MB, type jfs2 inside volume group ‘newvg’)

[root@aix:/] crfs -v jfs2 -g newvg -A yes -m /newfs2 -a size=64M
File system created successfully.
65328 kilobytes total disk space.
New File System size is 131072

NOTE: '-A yes' means to mount automatically the FS

Then, let’s mount filesystems:

[root@aix:/] mount /newfs
[root@aix:/] mount /newfs2

Now, you can check the filesystem with ‘lsfs’ and ‘df’ command:

[root@aix:/] df -m /newfs
Filesystem    MB blocks      Free %Used    Iused %Iused Mounted on
/dev/fslv05       64.00     63.67    1%        4     1% /newfs2
/dev/newlv        32.00     31.67    2%        4     1% /newfs

[root@aix:/] lsfs|grep newfs
/dev/newlv      --         /newfs                 jfs2  65536   --         yes  no
/dev/fslv05     --         /newfs2                jfs2  131072  --         yes  no