BC4000 Series RAID Controllers
User Manual
02/13/06
B ro ad c om C o r p or at i on
Page 48
Working with Spares
Document
BC4000-UM100-R
From RAIDConsole, see
“Adding or Removing Distributed Spares” on page 97
to add or remove a distributed
spare. From bcadm, see
“Creating New Arrays: bcadm --create” on page 130
.
To add a distributed spare while creating an array:
1.
From the
Array
menu, select
Create
.
2.
Configure the array.
3.
In the
Distributed Spare
field, click
Enabled
.
To add a distributed spare while transforming an array:
1.
From the
Array
menu, select
Transform
.
2.
Configure the new array.
3.
In the
Distributed Spare
field, click
Enabled
.
To remove a distributed spare:
1.
From the
Array
menu, select
Transform
.
2.
Configure the new array.
3.
In the
Distributed Spare
field, click
Disabled
.
Notes:
•
If there is insufficient unused space on the disks in an array, you cannot add a distributed spare
without adding an additional disk and transforming to an array with distributed sparing enabled.
The distributed spare option uses the equivalent storage of one of the disks in the array. For
example: the total capacity of six drives is being used in a RAID5 array, and you have enabled
distributed sparing. The capacity of the array is the same as a
four-drive RAID0. The capacity of one disk is lost to the RAID5 parity data, and the capacity of
another disk is lost to the distributed sparing option.
•
See
“About Sparing Options” on page 47
.
