Tandberg Data NAS Hardware Viking FS-1500 - Manual (Page 10)

Tandberg Data System Overview
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1-4 Tandberg Viking Series Storage Server Administration Manual
1.2.2. Configuring RAID using 16 HDD (3U)
The 3U appliance uses (FS-1600 / FS-1610) supports up to a maximum of
16 HDD. This provides greater degree of flexibility in RAID configurations:
• Allow HDD to be grouped into multiple RAID sets with respect to
their usage role: System Volume, Data Volume(s) or RAW Volumes
(for iSCSI target volume provisioning). HDD of differing capacity can
also be grouped into similar RAID sets.
• Assigning unused HDD as hot-spares.
• Multiple RAID level support on Volume sets.
Depending on the number of HDD used and their capacity, the RAID Set
grouping and the RAID level of each Volume Set is easily customizable.
Below is a working example:
Using 16 HDD in which 4 is 750GB and 12 is 1,000GB in capacity. The HDD
can be grouped into their respective RAID Set:
RAID Set#00 is created to house the OS as well as a File-system for
sharing. Volume Set#00 is created with RAID level 0+1 which contains a
usable capacity of 200GB. The remaining RAID Set#00 capacity is sliced
into Volume Set#01 of RAID level 5 that yield a resultant capacity of
1,950GB. Volume Set#00 is the System Volume (SV) and Volume Set#01 is
the Data Volume (DV).
• RAID Set#00 = 4 x 750GB
• Volume Set#00 = 200GB (RAID 0+1) SV
• Volume Set#01 = 1,950GB (RAID 5) DV
RAID Set#01 is created with iSCSI target LUN provisioning in mind. Ten (10)
of the 1,000GB HDD are grouped into RAID Set#01 and Volume Set#00 of
RAID level 6 is created out of it. This yields a usable capacity of 8,000GB
after the RAID 6 overhead.
• RAID Set#01 = 10 x 1000GB
• Volume Set#00 = 8,000GB (RAID 6)
The remaining two (2) of the 1,000GB HDD are set as hot-spares.
• Hot-spare = 2 x 1,000GB
The hot-spare can be assigned to any degraded RAID Set for rebuilding in
event that one (or more) of its member disk have failed.
Notes
While assigning hot-spare to a degraded RAID Set, ensure that the capacity of the
hot-spare must be equal or greater than the lowest capacity of the member disk of
that RAID Set.