Dell PERC 4/DC - Manual (Page 42)

Other Potential Problems
Table 6 -3 describes other problems that can occur.
Table 6-3. Other Potential Problems
Cache Migration
To move cache memory from one controller to another, first determine whether the cache memory contains data, then transfer it to the other controller. The
cache memory with a transportable battery backup unit (TBBU) contains an LED that lights up if data exists on the cache memory.
If the cache memory contains data, perform the following steps before you move the cache from one controller to another:
1. Make sure the NVRAM configuration on the new controller is cleared.
a. Before connecting any disks to the new controller, start the system and press <Ctrl><M> at the prompt to enter the BIOS Configuration Utility.
b. If there is an existing configuration on the new controller, make sure that no drives are connected to the new controller before clearing the
NVRAM configuration.
c. Access the Management Menu, then select Configure—> Clear Configuration.
This clears the configuration on the NVRAM.
2. Make sure that the configuration data on the disks is intact.
The following SCSI IDs are not
responding:
Channel x:a.b.c
The physical drives with SCSI IDs a, b, and c are not
responding on SCSI channel x.
l Make sure the physical drives are properly
connected and are powered on.
Following SCSI disk not found and
no empty slot available for
mapping it
The physical disk roaming feature did not find the physical
disk with the displayed SCSI ID. No slot is available to map
the physical drive and the RAID controller cannot resolve
the physical drives into the current configuration.
l Reconfigure the array.
Following SCSI IDs have the same
data y, z
Channel x: a, b, c
The physical drive roaming feature found the same data
on two or more physical drives on channel x with SCSI IDs
a, b, and c. The RAID controller cannot determine the drive
that has the duplicate information.
l Remove the drive or drives that should not be
used.
Unresolved configuration mismatch
between disks and NVRAM on the
adapter
The RAID controller is unable to determine the proper
configuration after reading both NVRAM and Configuration
on Disk
l Press <Ctrl><M> to run the BIOS Configuration
Utility.
l Select Configure—> New Configuration to create
a new configuration.
Note that this will delete any configuration that
existed.
Topic Information
Physical drive errors To display the BIOS Configuration Utility Media Error and Other Error options, press <F2> after selecting
a physical drive under the Objects—> Physical Drive menu.
A Media Error is an error that occurs while transferring data.
An Other Error is an error that occurs at the hardware level, such as a device failure, poor cabling, bad
termination, or signal loss.
RAID controller power requirements The maximum power requirements are 15 watts at 5-V and 3 Amps.
Changes in the BIOS Configuration Utility do
not appear to take affect.
When there are multiple controllers in a system, make sure the correct controller is selected in the BIOS
Configuration Utility.