Linksys NSS2000 Cisco NSS2000 Series Network Storage System Administration Gui - Page 52

Minimum Number of Disks, Total capacity, Advantages, the JBOD array

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Configuring your Storage Choosing a RAID Array Level 4 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 may 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. Cisco Small Business NSS2000 Series Administration Guide 44

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Configuring your Storage
Choosing a RAID Array Level
Cisco Small Business NSS2000 Series Administration Guide
44
4
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 may 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.