How do you identify what device is \Device\Harddisk3\DR3 and solve this error?

How do I know which device is '\Device\Harddisk3\DR3' and how do I fix this problem?
The server is a Dell PowerEdge and the O/S is Windows 2008 R2 Enterprise

The windows event logs has .
SOURCE = Disk and EVENT ID =11
The driver detected a controller error on \Device\Harddisk3\DR3.

The backup Exec 2012 displays this error for the same event
The driver detected a controller error on \Device\Harddisk3\DR3.

This error signifies controller errors. These errors are generally caused by hardware that is not functioning correctly. To resolve these errors, try the following actions:

- Slow the SCSI bus.
- Verify that the latest SCSI drivers and firmware are loaded.
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noxchoGlobal Support CoordinatorCommented:
It says that your HDD3 is faulty. Means that HDD3 on slot 3 is bad or having problems. Go into RAID configuration utility and check there the drives.
masterofallAuthor Commented:
How do I know which drive is #3?
noxchoGlobal Support CoordinatorCommented:
In RAID Configuration utility actually. Or you can refer to motherboard or RAID controller manual and see the numbering of the slots.

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masterofallAuthor Commented:
I spoke to Dell pro support. They would not guarantee that disk3 on the error message corresponds to  disk3 on he controller but you may be correct.
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