Example 1: A Simple Logical Volume

1. Unmount the disks that will be used in the volume if they are mounted. For example:

# df
Filesystem                 Type  blocks     use   avail %use  Mounted on
/dev/root                   efs 1939714  430115 1509599  22%  /
/dev/dsk/dks0d2s7           efs 2004550      22 2004528   0%  /d2
/dev/dsk/dks0d3s7           efs 3826812      22 3826790   0%  /d3
# umount /d2
# umount /d3

1. Start xlv_make:

   # xlv_make

   xlv_make>

2. Start creating the volume by specifying its name, for example xlv0:

   xlv_make> vol xlv0

   xlv0

3. Begin creating the data subvolume:

   xlv_make> data

   xlv0.data

   xlv_make echoes the name of each object (volume, subvolume, plex, or volume element) you create.

4. Continue to move down through the hierarchy of the volume by specifying the plex:

   xlv_make> plex

   xlv0.data.0

5. Specify the volume elements (disk partitions) to be included in the volume, for example /dev/dsk/dks0d2s7 and /dev/dsk/dks0d3s7:

   xlv_make> ve dks0d2s7

   xlv0.data.0.0

   xlv_make> ve dks0d3s7

   xlv0.data.0.1

   You can specify the last portion of the disk partition pathname (as shown) or the full pathname. xlv_make accepts disk partitions that are of types "xlv," "xfs," and "efs." You can use other partition types, for example "lvol," by giving the -force option, for example, ve -force dks0d2s7. xlv_make automatically changes the partition type to "xlv."

1. Tell xlv_make that you are finished specifying the objects:

   xlv_make> end

   Object specification completed

2. Review the objects that you've specified:

   xlv_make> show

   Completed Objects

   (1) VOL xlv0

   VE xlv0.data.0.0 [empty]

   start=0, end=2004549, (cat)grp_size=1

   /dev/dsk/dks0d2s7 (2004550 blks)

   VE xlv0.data.0.1 [empty]

   start=2004550, end=5831361, (cat)grp_size=1

   /dev/dsk/dks0d3s7 (3826812 blks)

3. Write the volume information to the logical volume labels by exiting xlv_make:

   xlv_make> exit

   Newly created objects will be written to disk.

   Is this what you want?(yes) yes

   Invoking xlv_assemble

4. Make an XFS filesystem using mkfs, for example:

# mkfs /dev/dsk/xlv/xlv0
meta-data=/dev/dsk/xlv/xlv0      isize=256    agcount=8, agsize=16094 blks
data     =                       bsize=4096   blocks=2482901
log      =internal log           bsize=4096   blocks=1000
realtime =none                   bsize=4096   blocks=0, rtextents=0

need correct command line

1. Mount the filesystem, for example:

   # mkdir /vol1

   # mount /dev/dsk/xlv/xlv0 /vol1

2. To have the logical volume mounted automatically at system startup, add an entry for the volume to /etc/fstab, for example:

   /dev/dsk/xlv/xlv0 /vol1 xfs rw,raw=/dev/rdsk/xlv/xlv0 0 0