Using Auto-Carving for Multi LUN Support
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To enable Auto-Rebuild through 3BM
1
On the main 3BM screen,
Tab
to
Settings
and press
Enter
.
2
On the pop-up menu, select
Controller Policies
and press
Enter
.
3
On the Policy Settings page,
Tab
to the
Auto-Rebuild
field, press
Enter
to display the options, select
Enable
and press
Enter
again to select it.
4
Tab
to
OK
and press
Enter
to select it.
The policy is enabled immediately.
To enable Auto Rebuild through 3DM
1
Choose
Management > Controller Settings
from the menu bar in 3DM.
2
In the Other Controller Settings section at the bottom of the screen, select
the
Enabled
option for
Auto Rebuild
.
The page refreshes, and a message at the top confirms the change you
have made.
Using Auto-Carving for Multi LUN Support
When the Auto-Carving policy is on, any unit larger than a specified size
(known as the
carve size
) is created as multiple volumes that can be addressed
by the operating system as separate volumes. These chunks are sometimes
known as multiple LUNs (logical units). However, throughout the 3ware
documentation, they are referred to as
volumes
.
For example, using the default carve size of 2 TB, if the unit is 2.5 TB then it
will contain two volumes, with the first volume containing 2TB and the
second volume containing 0.5 TB. If the unit is 5.0 TB then it will contain 3
volumes, with the first two volumes containing 2 TB each and the last volume
containing 1 TB. (
Note:
If a specific Boot Volume was also specified in 3BM,
the first volume will be the size specified for the Boot Volume, and then the
carve size will be applied to the remainder of the unit. For more information,
see “Boot volume size” on page 99.)
Each volume can be treated as an individual disk with its own file system. The
default carve size is 2 TB; you can change this to a setting in the range of
1 TB to 2 TB (1024 MB to 2048 MB). 3ware firmware supports a maximum
of 8 volumes per controller, up to a total of 16 TB.
If you are migrating a unit to a size that is larger than the carve size and auto-
carving is on, multiple volumes will be created.
