Red Hat GFS 6.0 -, Administrator'S Manual

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26 Chapter 5. Using the Pool Volume Manager
/dev/sdd8 <- unknown ->
/dev/hda <- partition information ->
/dev/hda1 <- EXT2/3 filesystem ->
/dev/hda2 <- swap device ->
/dev/hda3 <- EXT2/3 filesystem ->
5.4. Creating a Configuration File for a New Volume
A pool configuration file is used as input to the
pool_tool
command when creating or growing a
pool volume. The configuration file defines the name and layout of a single pool volume. Refer to
Figure 5-1 for the pool configuration file format. Refer to Table 5-9 for descriptions of the configura-
tion file keywords and variables.
An arbitrary name can be used for a pool configuration file; however, for consistency, it is recom-
mended that you name the file using the pool name followed by the
.cfg
extension (
poolname .cfg
).
For example, the pool configuration file for a pool named
pool0
would be defined in configuration
file
pool0.cfg
.
Before creating a configuration file, you can check to see what devices are available by using the
pool_tool
command with the
-s
option.
poolname name
minor number
subpools number
subpool id stripe devices [ type ]
pooldevice subpool id device
Figure 5-1. File Structure: Pool Configuration File
File Line and
Keyword
Variable Description
poolname
name
The name of the pool device that appears in the
/dev/pool/
directory.
minor
number
Assigns a device minor number (0 to 64) to a
pool. If number is specified as 0 (or if the minor
line is omitted), the minor number of the pool is
assigned dynamically. The default value is 0.
subpools
number
Represents the total number of subpools in the
pool. The
number
value should be set to a
value of 1 unless special data or journal
subpools are used.