Technical information

How Do I Configure a Mylex Controller for the First Time?
1-12 RAID EzAssist User’s Manual
screen is displayed (Figure 1-8).
Figure 1-8. Do You Want Fault Tolerance?
In most situations you will want fault tolerance to protect your array in the
event of a drive failure. However, if raw performance utilizing maximum
available drive capacity overshadows your need for fault tolerance, a RAID 0
(striping) configuration may be more appropriate.
☞ If you want your array to be fault tolerant, press Enter with
Yes selected.
☞ If you prefer a RAID 0 striping or a JBOD configuration and
fault tolerance is not a consideration, use the arrow key to select
No, then press Enter.
■ Spare Drive?
The Spare Drive screen is displayed under the following conditions:
• Fault Tolerance = YES, AND
• Number of Unconfigured Drives on Controller > 3
☛ Note
If you have two unconfigured drives on this controller,
you’ll get a RAID 1 (mirroring) configuration. If you
have three unconfigured drives, you’ll get a RAID 5
(striping with parity) configuration. In both cases no
drive would be available to act as a spare, so you will
therefore NOT see the Spare Drive choice screen.
Assuming your situation meets the conditions above, the Spare Drive screen