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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 1.28-4Examples of RAID Level 5 configurations in partially-populated array with at least six sleds. Hot Spare
sleds are in the highest slot numbers.
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.
3
Decide the RAID Level 5 configuration you
want based on the number of sleds you are
using and Exhibit 1.28-4 above.
4
Type set QuickRAID5 [2 | 3 | 4 | ALL]
59
ATTO Technology Inc. Diamond Storage Array Installation and Operation Manual
Sled
1
2
3
LUN1
LUN 1
LUN 1
LUN 1
Accessing
ATTO
on page 25).
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 1.28-4, beginning with the slot
closest to the management card.
4
5
6
7
LUN 2
LUN 2
LUN 1
LUN 1
5
Type SaveConfiguration Restart to save the
RAID Level 5 configuration.
6
A Ready prompt displays. You must zero all
drives and parity to make all RAID Level 5
drives coherent. Type RAID5ClearData all
CAUTION
CAUTION
This is a destructive operation: all
information stored on these drives is lost.
CAUTION
CAUTION
DO NOT interrupt power until the
RAID5ClearData operation has completed
(three to six hours).
7
Information displays on the screen while the
array updates NVRAM ending with a Ready*.
8
Type SaveConfiguration.
9
Type FirmwareRestart to reboot the array.
10 Reboot the host computer connected via Fibre
Channel or SCSI to the array.
.
QuickRAID5 ALL
8
9
10
11
Spare
Spare
12
Hot
Hot
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