ATTO Technology Diamond Storage Array S-Class Installation And Operating Manual page 72

Configuring a partially-populated array
The simplest way to attain RAID Level 5 in a
partially-populated array (an array with three or
more sleds but less than 12 sleds) is to create one
RAID Level 5 group, with or without hot spare
Exhibit 6.4-4 Examples of RAID Level 5 configurations in partially-populated array with at least six sleds. Hot Spare
sleds are in the highest slot numbers.
Sled
QuickRAID5 4
3 contiguous sleds in slots 1-3
and slots 4-6 with no Hot Spare
sled
QuickRAID5 3
4 contiguous sleds in slots 1-4
and slots 5-8 with no Hot Spare
sled
QuickRAID5 2
6 contiguous sleds in slots 1-6
with no Hot Spare sled
QuickRAID5 2 1
5 contiguous sleds in slots 1-5
with up to 2 Hot Spare sleds
QuickRAID5 ALL
3-12 contiguous sleds with no
Hot Spare sleds
QuickRAID5 ALL 1
3-11 contiguous sleds with 1 Hot
Spare sled
To set up RAID Level 5 groups
1 Connect to Diamond Storage Array services via
the RS-232 port or the optional Ethernet
management services card (refer to
the Array
on page 17). You should now be in the
CLI.
2 Continue with the CLI or access the RAID page
of the ExpressNAV interface (refer to
ExpressNAV: Browser-based Interface
Note
Because the ExpressNAV pages take you
through this process easily, the following
instructions are based on the CLI commands.
Use these instructions as a guide in
ExpressNAV.
61
ATTO Technology Inc. Diamond Storage Array Installation and Operation Manual
sleds, encompassing all the available sleds by
using the CLI command
To set up a partially populated arrays, you must
have at least three sleds filling contiguous slots as
shown in Exhibit 6.4-4, beginning with the slot
closest to the management card.
1 2 3 4
LUN 2
LUN1
LUN 1
LUN 1
LUN 1
LUN 1
LUN 1
3 Decide the RAID Level 5 configuration you
want based on the number of sleds you are
using and Exhibit 6.4-4 above.
Accessing
4 Type set QuickRAID5 [2 | 3 | 4 | ALL]
5 Type SaveConfiguration Restart to save the
RAID Level 5 configuration.
6 A Ready prompt displays. You must zero all
ATTO
drives and parity to make all RAID Level 5
on page 25).
drives coherent. Type RAID5ClearData al
QuickRAID5 ALL
5 6 7 8
LUN 2
CAUTION CAUTION
This is a destructive operation: all
information stored on these drives is lost.
DO NOT interrupt power until the
RAID5ClearData operation has completed
(three to six hours).
.
9 10 11 12
Hot
Spare
Hot
Spare
l