Creating A Raid Array - Cisco Small Business NSS3000 Series Administration Manual

Configuring your Storage

Creating a RAID Array

Creating a RAID Array
NOTE
STEP 1
Cisco Small Business NSS3000 Series Network Storage System Administration Guide
JBOD: JBOD lets you combine multiple disks of mixed capacities into a single
logical storage device. The capacity of the JBOD array is the sum of the total
capacities of the individual component disks (that is, it does not have the limitation
of RAID0 where you lose some capacity when using mixed sized disks). JBOD
offers no performance increase compared to the component disks. It has lower
reliability than the component disks, as the failure of a single disk results, in
general, in the failure of the whole array. Depending on how you create volumes on
the JBOD array, you might be able to recover data when one or more disks in the
JBOD fail. This, however, is not guaranteed.
•
Minimum Number of Disks: 1
•
Total capacity: sum of capacities of component disks.
•
Advantages: Maximal storage capacity, especially when using mixed size
disks.
•
Disadvantages: Decreased reliability.
After you install the physical disks, you can create the RAID arrays. Before you
create a RAID array, either for the first time, or when you are rebuilding it as a result
of failed disks in the array, set the rebuild priority to determine how you want to
allocate the system resources for the rebuild. To set the rebuild priority, see
"Storage Options" on page
When adding disks to an array, we recommend that you use the same model of disk
with the same capacity. With the exception of a JBOD, RAIDs are configured to use
the maximum of the smallest disk capacity in the array for each additional disk in
the array. For example, if you install two, 250 GB disks and one 500 GB disk in a
RAID0 array, the total capacity is only 750 GB.
From the Manager Menu, click Storage
29.
RAID.
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