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ATTO Technology Inc. Diamond Storage Array Installation and Operation Manual
5.5 RAID Level 10
The Diamond Storage Array can be set up into RAID Level 10 (striped and mirrored) groups, with or
without hot spare sleds, to provide greater reliability by simultaneously writing data to two sleds. Each
sled partnered through QuickRAID10, a CLI command, has the same data as its partner.
CAUTIONCAUTION
Selecting RAID configuration causes all
previous drive data on the Diamond
Storage Array to be erased. Make sure all of
your information is backed up before
configuring RAID groups.
The configuration of RAID Level 10 stripes
information across several mirrored drives,
performing the same operations on two partnered
sleds at the same time thus providing an automatic
backup of data.
The
QuickRAID10
command, accessed through
the Command Line Interface or ExpressNAV
interface, first creates six mirrored groups, then
stripes them into groups of one, two or three
RAID 10 groups (see Exhibit 5-6).
When you initially set up RAID groups using the
QuickRAID command, groups are synchronized
automatically because there is no pre-existing
data on the drives. However, drives may display
as “degraded, and you need to set all LUNs to OK
status. Refer to
Rebuilding RAID Level Configurations
on page 63
To set up RAID Level 10 groups
1 Connect to Diamond Storage Array services via
the RS-232 port or the optional Ethernet
management services card (refer to
Accessing
the Array
on page 17). You should now be in
CLI.
1 Continue with the CLI or access the RAID page
of the ExpressNAV interface (refer to
ATTO
ExpressNAV: Browser-based Interface
on page 25).
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.
2 Decide how many RAID Level 10 groups you
want (0, 1, 2 or 3).
3Type set QuickRAID10 [0 |1 | 2| 3]
0 returns the array to JBOD.
4 Information displays on the screen while the
array updates NVRAM ending with a Ready*.
5Type SaveConfiguration.
6Type FirmwareRestart to reboot the array.
7 Reboot the host computer connected via Fibre
Channel or SCSI to the array.
8 The array is now configured. To verify the
configuration, type DriveInfo. If any sleds are
missing, the sled slots are reported as offlin
e
.
To remove RAID groups
1 Connect to Diamond Storage Array services via
the RS-232 port or the optional Ethernet
management services card (refer to
Accessing
the Array
on page 17). You should now be in
CLI.
2 Continue with the CLI or access the RAID page
of the ExpressNAV interface (refer to
ATTO
ExpressNAV: Browser-based Interface
on page 25).
3Type set QuickRAID10 0 to configure the array
in JBOD mode.
4 Information displays
on the screen while
the array updates
NVRAM ending with
a Ready*.
5Type
SaveConfiguration
6Type
FirmwareRestart to
reboot the array.
7 Reboot the host
computer.
An example of RAID 10 (QuickRAID10 2) in a fully populated Diamond Storage Array:
6 sleds, each partnered with another sled, with each partner a mirror image of the
other, configured into two stripe groups or Virtual Drives
2 Virtual Drives
2 spanned drives per sled
each sled a mirror image of its
partner