12.2.12 Vender unique error information (Byte 20 thru 23)
This field gives detail information of the error. It contains a unique code which describes where the error was
detected and which piece of hardware or microcode detected the error.
12.2.13 Physical Error Record (Byte 24 thru 29)
ILI = 1 - This field contains zeros.
ILI = 0 - These bytes contain the physical location of the error in cylinder, head and sector. Byte 24
and 25 are Cylinder high and cylinder low respectively. Byte 26 is the head number. Byte 28 and 29 are
sector high and low respectively.
Byte 27 is retained for compatibility and will contain the sector number for sector 0 to 254 and will be
set to 0FFh for sector numbers greater than 254 or if the sector number is undetermined.
If the head undetermined, its value is to 0FFh. If the cylinder value is undetermined, byte 24 and 25 are
set to 0FFFFh. If the sector number is undetermined, bytes 27, 28, and 29 are all set to 0FFh. If cyl-
inder, head, and sector have no relevance to the error, bytes 24 through 29 will all be set to 0FFh. This
field is valid with Sense Key 1, 3 and 4 only.
12.2.14 Reserved (Byte 30 thru 31)
Reserved fields are filled with zero.
SCSI SENSE DATA 213
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