Red Hat GFS 6.0 -, Administrator'S Manual

Page: 45 / 192

Chapter 5. Using the Pool Volume Manager 31
ConfigFile
Specifies the file describing the extended pool.
Note
The
pool_tool
-g
command supersedes the
pool_grow
command as of GFS 5.2. Although the
pool_grow
command is still available, it is not supported in GFS 5.2 and later.
5.8.2. Example procedure
The following example procedure expands a pool volume.
1. Create a new configuration file from configuration information for the pool volume that you
want to expand (in this example,
pool0
):
#
pool_tool -p pool0 > pool0-new.cfg
#
cat pool0-new.cfg
poolname pool0
subpools 1
subpool 0 128 4 gfs_data
pooldevice 0 0 /dev/sdb1
pooldevice 0 1 /dev/sdc1
pooldevice 0 2 /dev/sdd1
pooldevice 0 3 /dev/sde1
2. Edit the new file,
pool0-new.cfg
, by adding one or more subpools that contain the devices or
partitions, as indicated in this example:
poolname pool0
subpools 2 <---
Change
subpool 0 128 4 gfs_data
subpool 1 0 1 gfs_data <---
Add
pooldevice 0 0 /dev/sdb1
pooldevice 0 1 /dev/sdc1
pooldevice 0 2 /dev/sdd1
pooldevice 0 3 /dev/sde1
pooldevice 1 0 /dev/sdf1 <---
Add
3. After saving the file, verify that the file has been changed:
#
cat pool0-new.cfg
poolname pool0
subpools 2 <---
Changed
subpool 0 128 4 gfs_data
subpool 1 0 1 gfs_data <---
Added
pooldevice 0 0 /dev/sdb1
pooldevice 0 1 /dev/sdc1
pooldevice 0 2 /dev/sdd1
pooldevice 0 3 /dev/sde1
pooldevice 1 0 /dev/sdf1 <---
Added
4. Run the
pool_tool
command with the grow (
-g
) option specifying the configuration file:
pool_tool -g pool0-new.cfg