Hitachi Compute Blade 500 Series User Manual page 245

Table 4-14 Specify the RAID level, strip size, and policies
Menu items
RAID Level
1,2
RAID Level
Strip size
3
Strip Size
(only for RAID 0 and 5)
Access Policy Access policy
Read Policy Read policy
4 Write policy
Write Policy
IO Policy Read-cache operation
Disk Cache Policy Setting the disk cache
Disable BGI Setting the background
initialization
Size of a disk array
5
Select Size
Notes:
1 AID 6 with 3 hard disks and RAID 1 with 3 or more hard disks are not
.
supported.
2 When you add a disk array to the existing drive group, the RAID level cannot be
.
changed.
3 For RAID 1, set 64 KB by Default.
.
4 In Write Policy, Write Back with BBU is supported only. If not, write
.
performance may be degraded.
5 Maximum capacity size that can be set is shown under Next LD, Possible
.
RAID Levels at the right of the window. Type a new value within the maximum
MegaRAID WebBIOS for storage expansion blades
Hitachi Compute Blade 500 Series EFI User's Guide
Description
Specify any level.
8 KB/16 KB/32 KB/[<<64
KB>>]/128 KB/256 KB/512 KB/1
MB
[<<RW (reading and writing)>>] /
Read Only (reading only) /
Blocked (access denied)
[<<Normal (no advance
reading)>>] /
Ahead (always advance reading)
<<Write Through (write cache
invalid)>> /
Always Write Back (write-cache
valid) /
[Write Back with BBU (Write cache
is valid only when the cache backup
module is installed)]
[<<Direct (reading from the cache
at a cache hit)>>] /
Cached (always reading from the
cache)
[<<Disable (setting invalid)]/
Enable (setting valid)>> /
Unchanged (depending on the hard
disk setting)
<<No (background initializing
valid)>> /
[Yes (background initializing
invalid)]
Enter any value within the
maximum capacity value. The
lowest available value is 64 KB.
Setting/display value
4-35