Maintenance Manual

Managing the System
Disk Management
Cisco Small Business NSS300 Series Smart Storage Administration Guide 113
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Depending on the NAS model that you own, volumes can be created in the
following volume types:
Volume Type Description
Single Disk
Volume
Each disk will be used as a standalone disk. However, if a
disk is damaged, all data will be lost.
RAID 1 Mirroring
Disk Volume
RAID 1 (mirroring disk) protects your data by automatically
backing up the contents of one drive onto the second
drive of a mirrored pair. This protects your data if one of
the drives fails. Unfortunately, the storing capacity is equal
to a single drive, as the second drive is used to
automatically back up the first. Mirroring Disk is suitable
for personal or corporate use to store important data.
RAID 0 Striping
Disk Volume
RAID 0 (striping disk) combines 2 or more drives into one
larger disk. It offers the fastest disk access but it does not
have any protection of your data if the striped array fails.
The disk capacity equals the number of drives in the array
times the size of the smallest drive. Striping disk is usually
used to maximize your disk capacity or for fast disk
access but not for storing important data.
RAID 10 Disk
Volume
RAID 10 combines the advantages of RAID 0 and RAID 1
in a single system. It provides security by mirroring all data
on a secondary set of disks while using striping across
each set of disks to speed up data transfers. A minimum of
4 hard disks are required to create a RAID 10 disk volume
and support the even number of hard disk drives installed.
The storage capacity of the RAID 10 disk volume is equal
to the size of the smallest capacity disk in the array times
the number of hard disks divided by two (2). It is
recommended (though not required) that you use the
same brand and same capacity hard drive to establish the
most efficient hard drive capacity. RAID 10 is suitable for
an organization running databases that require higher
performance with data protection.