User's Manual

When a physical disk in a concatenated or spanned volume fails, the entire volume becomes unavailable.
Because the data is not redundant, it cannot be restored by rebuilding from a mirrored disk or parity
information. Restoring from a backup is the only option.
Because concatenated volumes do not use disk space to maintain redundant data, they are more cost-
efficient than volumes that use mirrors or parity information. A concatenated volume may be a good
choice for data that is temporary, easily reproduced, or that does not justify the cost of data redundancy.
In addition, a concatenated volume can easily be expanded by adding an additional physical disk.
• Concatenates n disks as one large virtual disk with a capacity of n disks.
• Data fills up the first disk before it is written to the second disk.
• No redundant data is stored. When a disk fails, the large virtual disk fails.
• No performance gain.
• No redundancy.
RAID Level 0 (Striping)
RAID 0 uses data striping, which is writing data in equal-sized segments across the physical disks. RAID 0
does not provide data redundancy.
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