Understanding Raid Level-0 - IBM Netfinity ServeRAID-3H Installation And User Manual

Understanding RAID level-0

RAID level-0 stripes the data across all the drives in the array. This offers substantial speed
enhancement, but provides for no data redundancy. RAID level-0 provides the largest capacity of the
RAID levels offered, because no room is taken up for redundant data or data-parity storage.
RAID level-0 requires a minimum of one drive and, depending upon the level of firmware and the
stripe-unit size, supports a maximum of eight or 16 drives.
The following illustration shows an example of a RAID level-0 logical drive.
You start with two physical drives.
Create an array using the two physical drives.
Then, create a logical drive within that array.
The data is striped across the drives, creating blocks.
Notice that the data is striped across all the drives in the
array, but no redundant data is stored.
A physical drive failure within the array results in loss of data in the logical drive assigned RAID level-0,
but only in that logical drive. If you have logical drives assigned RAID level-1, 1E, 5, or 5E in the same
array, they will not lose data.
Note: You can assign RAID level-0 only to logical drives in an array that contains only one physical drive.
When you replace a failed drive, the ServeRAID controller can rebuild all the RAID level-1E and RAID
level-5E logical drives automatically onto the replacement physical drive. However, any data stored in a
failed RAID level-0 logical drive is lost.
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Chapter 1. Getting started
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