HP Array Controller HSG V8.7 Software - Manual (Page 128)

3–50 HSG80 User’s Guide
Maximum Chunk Size for RAIDsets
Do not exceed the chunk sizes shown in Table 3–3 for a RAIDset. (The
maximum chunk size is derived by 2048/(d – 1) where d is the number
of disk drives in the RAIDset.)
Save Configuration
Indicate whether to save the subsystem’s configuration on the storage
unit when you initialize it:
n NOSAVE_CONFIGURATION (default) means that the controller
stores the subsystem’s configuration in its nonvolatile memory
only. Although this is generally secure, the configuration could be
jeopardized if the controller fails. For this reason, you should
initialize at least one of your storage units with the
SAVE_CONFIGURATION switch enabled.
n SAVE_CONFIGURATION allows the controller to use 256K of
each device in a storage unit to save the subsystem’s configuration.
The controller saves the configuration every time you change it or
add a patch to your controller. If the controller should fail, you can
recover your latest configuration from the storage unit rather than
rebuild it from scratch.
The save configuration option saves the following information:
Table 3–3 Maximum Chunk Sizes for a RAIDset
RAIDset Size Max Chunk Size
3 members 1024 blocks
4 members 682 blocks
5 members 512 blocks
6 members 409 blocks
7 members 341 blocks
8 members 292 blocks
9 members 256 blocks
10 members 227 blocks
11 members 204 blocks
12 members 186 blocks
13 members 170 blocks
14 members 157 blocks