Dell PERC 4/DC User Manual download pdf (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.

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