5.3. Scanning Block Devices
Scanning block devices provides information about the availability and characteristics of the devices. That information is important for creating a pool configuration file. You can scan block devices by issuing the pool_tool command with the -s option. Issuing the pool_tool command with the -s option scans all visible block devices and reports whether they have an Ext2 or Ext3 file system, LVM version 1 labels, a partition table, a pool label, or an unknown label on them.
 | Note |
|---|---|
The pool_tool -s command does not detect ondisk labels other than those mentioned in the preceding paragraph. |
5.3.2. Example
In this example, the response to the command displays information about one GFS file system, other file systems that have no labels, and a local file system.
# pool_tool -s
Device Pool Label
====== ==========
/dev/pool/stripe-128K <- GFS filesystem ->
/dev/sda <- partition information ->
/dev/sda1 stripe-128K
/dev/sda2 stripe-128K
/dev/sda3 stripe-128K
/dev/sda4 <- partition information ->
/dev/sda5 <- unknown ->
/dev/sda6 <- unknown ->
/dev/sda7 <- unknown ->
/dev/sda8 <- unknown ->
/dev/sdb <- partition information ->
/dev/sdb1 <- unknown ->
/dev/sdb2 <- unknown ->
/dev/sdb3 <- unknown ->
. .
. .
. .
/dev/sdd4 <- partition information ->
/dev/sdd5 <- unknown ->
/dev/sdd6 <- unknown ->
/dev/sdd7 <- unknown ->
/dev/sdd8 <- unknown ->
/dev/hda <- partition information ->
/dev/hda1 <- EXT2/3 filesystem ->
/dev/hda2 <- swap device ->
/dev/hda3 <- EXT2/3 filesystem -> |