BC4000 Series RAID Controllers
User Manual
02/13/06
B ro ad c om C o r p or at i on
Page 92
Working with Arrays
Document
BC4000-UM100-R
R
ECOVERING
A
RRAYS
The
Recover Array
function attempts to force a failed array back into a functioning state. This option is
provided as a last resort to recover whatever data might be present after an array has failed and its data cannot
be recreated by the controller.
To recover an array:
1.
From the
Options
menu, ensure that
Advanced Options
is selected.
2.
Click the failed array you want to recover.
3.
From the
Array
menu, select
Recover
.
C
HANGING
C
ACHE
S
ETTINGS
FOR
A
RRAYS
You can choose from four array caching options:
•
No Cache
. When the No Cache option is selected for an array, I/O requests are translated and passed to
the disks without keeping a cached copy of the data available for future requests.
•
Read Cache
. When selected, the Read Cache option caches reads, if appropriate, and performs
sequential read ahead when necessary.
•
Write Back Cache
. When the Write Back Cache setting is selected, writes are cached. This setting is
intended for advanced users who understand the implications of write caching.
•
Read + Write Back Cache
(default setting). Both Read and Write Back Cache options can be selected.
To change cache settings:
1.
In the
Array View
area, click the array whose caching options are to be changed.
2.
From the
Array
menu, select
Modify Cache Settings,
and then click either:
No Cache
Or
Read Cache
Or
Write Back Cache
Or
Read + Write Back Cache
The new cache setting is displayed in the
Array List
Information.
Note:
Cache options cannot be changed while a task is active on that array, but they can be changed
at any other time, including while I/O is running.
