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ATTO Technology Inc. Diamond Storage Array Installation and Operation Manual
7.1 Virtual Tape
When the Diamond-VT is configured as a Virtual Tape, it is divided into several tape volumes based on
your choice and the RAID level you choose.
Virtual Tape provides increased performance by
reducing the time needed to backup and restore
data. Virtual Tape volumes reside on Virtual
Drives. The Diamond-VT appears to hosts as a
tape library, allowing ISV packages to issue a set
of tape library commands to perform backup and
restore operations to the Diamond-VT.
The underlying storage used for Virtual Tape is
specified using the
QuickTape
command.
The simplest way to set up Virtual Tape
configurations is to use the ExpressNAV
interface. See
ATTO ExpressNAV: Browser-based
Interface
on page 23 for more information.
If you use the CLI, the command
QuickTape
sets
up Virtual Tapes using the following format:
set QuickTape [RAID5|RAID10] [# tape
volumes] [# tape drives] <enabled>
<Barcode Prefix>
Hot Spares are not available for all Virtual Tape
configurations. You must designate
enabled
to
allow Hot Spare sleds or
disabled
to forgo Hot
Spare sleds. Refer to and
Optional Hot Spare Sled
on
page 50 for more information and examples.
You may specify the first four to six alpha-
numeric characters of a tape bar code, used by
tape backup software. The remaining four
characters will be entered by the system
automatically to identify the tape number.
Note
The maximum number of tape volumes and
tape drives for RAID Level 5 is 30.
The maximum number of tape volumes and
tape drives for RAID Level 10 is 15.
Configuration examples
RAID Level 10 with Hot Spare sleds
set QuickTape RAID10 15 1 enabled
SaveConfiguration Restart
The Diamond-VT will be configured into RAID
Level 10 with one tape drive, 15 tape volumes and
two Hot Spare sleds.
RAID Level 5 and no Hot Spare sled
set QuickTape RAID5 30 2
SaveConfiguration Restart
The Diamond-VT will be configured into RAID
Level 5 with two tape drives and 30 tape volumes.