Asus INTEL TUSL2 User Manual page 90

5. SOFTWARE SETUP
8. Confirm the command to copy data from the intact source hard disk onto a new
replacement hard disk. A progress gauge displays the copy progress for the
duration of the task.
9. After the rebuild is complete, the user is prompted to reboot the system.
Controller Configuration (6): Default for Controller Configuration is: [enabled].
5.4.6 Alternative Set Ups and Other Details
Hot Spares
A hot spare hard disk may be installed to support a RAID 1 array. This spare hard
disk must share one of the Ultra-DMA/100 cables attached to either of the hard
disks active in a RAID 1 array. In the event of a failure of either active hard disk in
the array, the "Lite" BIOS detects the hot spare and automatically rebuilds the mirrored
data from the functional hard disk. The FastBuild Utility will report a warning
message after such a hard disk failure; it may indicate that the good hard disk and
the hot spare are connected to the same cable, so then it will be necessary to transfer
the hot spare to the other cable and reboot again.
Use Both ATA-100 Connectors
Optimal performance for RAID 0 and 1 arrays require that each hard disk be connected
to separate IDE channels; the first hard disk should be connected to the Primary
ATA-100 connector and the second hard disk, to the Secondary ATA-100 connector.
Adding Extra Hard Disks
The TUSL2 is supplied with two additional Primary IDE and Secondary IDE
connectors. Only two hard disks connected to the Primary and Secondary ATA-100
IDE connectors can function in a RAID 0 or RAID 1 array. Extra hard disks may be
connected to the system using the onboard IDE connectors, but such disks cannot be
configured in a RAID array. In principle, up to eight hard disks or other IDE devices
may connect to the TUSL2. Whether an array is set up or not, all hard disks connected
to the TUSL2 will function at the ATA-100 protocol.
Use ATA-100, High-RPM Hard Disks with Identical Storage Capacity
The fastest available hard disks should be used in the RAID 0 array to maximize
performance. Slower hard disks may be used; however, the RAID 0 array can only
double the speed of particular hard disks. Since you can achieve better performance
with a single ATA-100 hard disk than with two ATA-33 disks in a RAID 0 array, it is
more effective to install two ATA-100 or ATA-66 high-RPM hard disks for an array.
Hard disks used for both RAID 0 and 1 arrays should always have the same storage
capacity because the RAID protocol automatically formats both disks to use only up
to the maximum write space available on the smaller of two hard disks with different
memory capacities..
90 ASUS TUSL2 User's Manual