Adaptec 5325301638 - Snap Server 4500 NAS, Administrator'S Manual

Page: 44 / 148

RAIDs
30 Snap Server Administrator Guide
space is preconfigured to allocate eighty percent of the RAID for the file system and
the remaining twenty percent for snapshots.
RAIDs
RAIDs are created, viewed, edited, and deleted from the
Storage > RAID Sets
screen
of the Administration Tool. Most Snap Servers ship with all disk drives configured
as a RAID 5. Before changing the default RAID configuration, consider the
following information on the Snap Server’s RAID implementation.
Factors in Choosing a RAID Type
The type of RAID configuration you choose depends on a number of factors: (1) the
importance of the data; (2) performance requirements; (3) drive utilization; and (4)
the number of available drives. For example, in configuring the four disk drives of
the 4500, the decision whether to include a hot spare in the RAID depends on the
value you place on capacity vs. high availability. If capacity is paramount, you
would use all drives for storage; if high availability were more important, you
Dri
ves /
RAI
D
Snap Server 18000 8-disk RAID 5 + hot spare
Snap Server 15000
Snap Server 4500
Snap Server 4200 4-disk RAID 5 (No hot spare configured)
Snap Server 14000 11-Disk RAID 5 + 1 local hot spare
Snap Disk 10 4-disk RAID 5 (No hot spare configured)
Snap Disk 30/32SA 16-disk JBOD
Al
lo
cat
io
n
Volume 80% of RAID capacity is allocated to the default volume.
Snapshot Pool 20% of RAID capacity is allocated to the snapshot pool.
Se
cur
it
y
Shares A single share points to the volume.
Share Access Grants read/write access to all users and groups over all
protocols.
Security Model Windows-style file-level security (can be changed to UNIX)