Avago Technologies MegaRAID Fast Path Software - Manual (Page 248)

Page 248 LSI Corporation Confidential | July 2011
MegaRAID SAS Software User Guide Chapter 5: MegaRAID Command Tool | Virtual Drive-Related Options
5.13.9 Display the Free Space Use the command in the following table to display the free space that is available to use
for configuration on the selected controllers.
5.14 Virtual Drive-Related
Options
You can use the commands in this section to select settings for the virtual drives and
perform actions on them.
5.14.1 Display Virtual Drive
Information
Use the command in the following table to display virtual drive information for the
selected controllers.
5.14.2 Change the Virtual Drive Cache
and Access Parameters
Use the command in the following table to change the cache policy and access policy
for the virtual drives on the selected controllers.
Table 81: Display Free Space
Convention MegaCli –CfgFreeSpaceInfo -aN|-a0,1,2|-aALL
Description Displays all of the free space available for configuration on the selected
controllers. The information displayed includes the number of drive groups,
the number of spans in each drive group, the number of free space slots in
each drive group, the start block, and the size (in both blocks and
megabytes) of each free space slot.
Table 82: Display Virtual Drive Information
Convention MegaCli –LDInfo –Lx|-L0,1,2|-Lall -aN|-a0,1,2|-aALL
Description Displays information about the virtual drives on the selected controllers.
This information includes the name, RAID level, RAID level qualifier, capacity
in megabytes, state, stripe size, number of drives, span depth, cache policy,
access policy, and ongoing activity progress, if any, including initialization,
background initialization, consistency check, and reconstruction.
Table 83: Change Virtual Drive Cache and Access Parameters
Convention MegaCli –LDSetProp WT | WB [-Immediate]| RA |NORA |
ADRA|-Cached|Direct|CachedBadBBU|NoCachedBadBBU} |
-RW|RO|Blocked | {-Name nameString} |
-EnDskCache|DisDskCache –Lx| -L0,1,2|-Lall
-aN|-a0,1,2|-aALL
Description Allows you to change the following virtual drive parameters:
-WT (Write through), WB (Write back): Selects write policy.
-Immediate : Indicates that the changes take place immediately.
-NORA (No read ahead), RA (Read ahead), ADRA (Adaptive read ahead):
Selects read policy.
-Cached , -Direct: Selects cache policy.
-CachedBadBBU|NoCachedBadBBU : Specifies whether to use write
cache when the BBU is bad.
-RW , -RO, Blocked: Selects access policy.
-EnDskCache : Enables drive cache.
-DisDskCache : Disables drive cache.