Avago Technologies 3ware SAS 9750-4i - Manual (Page 59)

Controller Object Commands
www.lsi.com/channel/products 51
p6 NOT-PRESENT - - - -
p7 OK u0 76.33 GB 160086528 Y2NXM4VE
p8 OK u0 74.53 GB 156301488 3JV3WTSE
p9 OK u0 74.53 GB 156301488 3JV3WRHC
p10 OK u0 74.53 GB 156301488 3JV3WQLQ
p11 OK u0 74.53 GB 156301488 3JV3WQLZ
Name OnlineState BBUReady Status Volt Temp Hours LastCapTest
---------------------------------------------------------------------------
bbu On Yes OK OK OK 0 xx-xxx-xxxx
/c x show rebuildmode
This command is only supported on 9750, 9690SA, and 9650SE controllers.
This command shows the current rebuild mode setting of the specified
controller. The rebuild mode has two settings: Adaptive and Low latency.
Rebuild mode works in conjunction with the rebuild task rate (see “/cx show
rebuildrate” on page 51).
The Adaptive setting is the default rebuild mode. It allows the firmware to
adjust the interaction of rebuild tasks with host I/Os to maximize the speed of
both host I/O and rebuild tasks. The Low Latency setting minimizes latency
(delay) in reading data from a RAID unit by slowing down the rebuild task
process. For some applications, such as video server applications and audio
applications, it is important to minimize the latency of read commands, so that
users do not perceive a lag when viewing video or listening to audio.
For a more complete discussion of background task modes, see “Working
with the Background Task Mode” in the 3ware SATA+SAS RAID Controller
Card Software User Guide, Version 10.0.
Example:
//localhost> /c1 show rebuildmode
/c1 Rebuild background task mode = Low Latency
Related commands:
/cx set rebuildmode=
/cx set rebuildrate=<1...5>
/cx show rebuildrate
/c x show rebuildrate
This command shows the current rebuild task rate of the specified controller.
The rebuild task rate sets the rebuild execution priority relative to I/O
operations.
This task rate is of the range [1..5], where 5 denotes the setting of fastest
background task and slowest I/O, as follows: