Dell PERC 4/SI - Manual (Page 7)

Changing the Mode on the Embedded RAID Controller from RAID/RAID to RAID/SCSI
Mode or from RAID/SCSI to RAID/RAID Mode
The embedded RAID controller on the system supports two modes of operations: RAID/RAID and RAID/SCSI. The RAID/RAID mode allows the system to use
both SCSI channels for RAID only operation. The RAID/SCSI mode allows the system to use RAID for the internal SCSI disk drives and reserves one SCSI
channel to allow the connection of internal tape or external SCSI devices. Before changing from RAID/RAID to RAID/SCSI (or from RAID/SCSI to RAID/RAID), you
must manually clear the RAID configuration to avoid configuration problems.
The following procedures are required when changing the embedded RAID controller from RAID/RAID to RAID/SCSI mode or from RAID/SCSI to RAID/RAID
mode:
Clearing the controller configuration:
1. Reboot the system.
2. When the RAID controller initialization displays, press to enter the RAID controller configuration utility.
If your system has add-on RAID controllers in addition to the embedded RAID controller, proceed to step 3 . If your system has only the embedded RAID
controller, then proceed to step 5 .
3. Select Select Adapter.
4. Select the embedded RAID controller and press .
5. Select Configure.
6. Select Clear Configuration.
7. Select Yes to confirm.
8. Press any key to return to the menu.
9. Press twice to exit the menu.
10. When prompted to exit, select Yes to exit the menu.
11. Reboot the system.
Changing the RAID Mode
1. Press to enter the system BIOS configuration.
2. Select Integrated devices and press to enter the Integrated Devices menu.
3. Move your selection to Channel B under Embedded RAID controller.
a. To change from RAID/RAID to RAID/SCSI, change this value from RAID to SCSI.
b. To change from RAID/SCSI to RAID/RAID, change this value from SCSI to RAID
4. Press to exit the Integrated Devices Menu.
5. Press again to exit the BIOS and reboot the system.
During the system boot, the following warning message displays to confirm the mode change:
Warning: Detected mode change from RAID to SCSI (or from SCSI to RAID) on channel B of the embedded RAID subsystem.
Data loss will occur!
6. Press to confirm this change.
NOTE: Dell does not support changing from RAID/RAID to RAID/SCSI or from RAID/SCSI to RAID/RAID with RAID virtual disks already created. If you
change mode without clearing the RAID configuration, then you may experience unexpected behavior on the system or system instability.
NOTICE: These steps will delete all data on the hard drives. Back up all your data before proceeding.
NOTICE: All your data will be lost after you perform this step. Do not perform this step until you have backed up all your data.