Instruction manual

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ATTO Technology Inc. FastStream SC 5300 Installation and Operation Manual
Appendix B Designing RAID groups
The ATTO FastStream SC 5300 provides instant hardware data protection and intelligence to existing
Fibre Channel storage independent of the storage type.
CAUTIONCAUTION
Selecting RAID configuration causes all
previous storage data on the drive to be
erased. Make sure all of your information is
backed up before setting up RAID groups.
RAID improves data accessibility and
reliability during normal operations,
however, you still need a good backup
strategy for long-term protection of your
data.
The ATTO FastStream SC 5300 allows RAID
functionality. In general, the process begins with
individual drives also called block devices.
Note
If a drive has corrupt or outdated configuration
data, that drive cannot be assigned to any
RAID group. Ensure all drives to be assigned
to RAID groups are configured properly. Refer
to
Initialize and verify drives on page 19 and
Update RAID configuration data on page 26.
A RAID group is a virtual, independent single
drive whose data is written to physical drives
according to a RAID algorithm. The ATTO
FastStream SC 5300 supports JBOD, RAID Level
0, RAID Level 1, RAID Level 10, DVRAID and
RAID Level 5.
RAID improves data accessibility and reliability
during normal operations, however, you still need
a good backup strategy for long-term protection
of your data.
JBOD (Just a Bunch of Disks)
JBOD (Just a Bunch of Disks) configuration
allows many individual drives to be available for
normal storage operations with no special data
protection.
Using the ATTO FastStream SC 5300 allows you
to concatenate several individual drives into one
large drive.
A JBOD drive can be constructed as a special case
of a RAID group. When multiple physical drives
are assigned to a JBOD RAID group, their storage
areas appear as a single spanned area of storage.
The ATTO FastStream SC 5300 supports 1 to 32
drives per JBOD-configured RAID group.
Exhibit A-2 JBOD: Just a Bunch of Disks: no
redundancy; each disk is treated independently
DVRAID (Digital Video RAID)
Digital Video RAID provides parity redundancy
for your data. Optimized for performance for the
high data transfer rates required in digital video
environments, DVRAID is ATTO Technology
proprietary technology which supports the editing
of uncompressed 10-bit High Definition (HD)
video and multiple streams of real-time,
uncompressed Stand Definition (SD) video.
You must use the Quick Digital Video setup
wizard in the ExpressNAV interface for 6, 12 or
24 drives. This set up does not allow you to use
any number but 6, 12 or 24 drives.
RAID Level 0
RAID Level 0 (striping) is based on the fact that
increased performance can be achieved by
simultaneously accessing data across multiple
drives, increasing data transfer rates while
reducing average access time by overlapping
drive seeks. RAID Level 0 groups provide data
that is striped across several drives. Drives are
accessed alternately, as if stacked one on top of
the other.
JBOD
Disk 0Disk 1Disk 2
D0 D4 D8
D1 D5 D9
D2 D6 D10
D3 D7 D11