R/Evolution 2000 Series Troubleshooting Manual page 97

When a disk detects an error, it reports it to the controller by returning a SCSI sense
key, and if appropriate, additional information. This information is recorded in the
RAIDar event log. Table 7-2 lists some of the most common SCSI sense key
descriptions (in hexadecimal). Table 7-3 lists the descriptions for the standard SCSI
sense codes (ASC) and sense code qualifiers (ASCQ), all in hexadecimal. See the
SCSI Primary Commands - 2 (SPC-2) Specification for a complete list of ASC and
ASCQ descriptions.
Table 7-2 Standard SCSI Sense Key Descriptions
Sense Key Description
0h No sense
1h Recovered error
2h Not ready
3h Medium error
4h Hardware error
5h Illegal request
6h Unit attention
7h Data protect
8h Blank check
9h Vendor-specific
Ah Copy aborted
Bh Aborted command
Ch Obsolete
Dh Volume overflow
Eh Miscompare
Fh Reserved
Chapter 7 Troubleshooting and Replacing FRUs 97