Physical Error Record (Byte 24 Thru 29); Reserved (Byte 30 Through 31) - IBM Ultrastar 36LZX Specifications

12.2.12.3 SMART Alert (Sense Code 5Dh)
When SMART Alert occurs (Sense Code 5Dh), the Vendor Unique Error information byte 21 will contain
the following reason code.
Sense Data
SMART Alert Reason
Byte 21
32h Read Error Rate exceeding the threshold
4Ah Write Error Rate exceeding the threshold
43h Seek Error Rate exceeding the threshold
14h Spare Sector Availability Warning
56h Spin Up Time Warning
5Bh Spin Up Retry Count Warning
00h Power On Hour Warning
50h Load/Unload Cycles Count Warning
Figure 196. Sense Data Byte 21 for SMART Alert Reason Code

12.2.13 Physical Error Record (Byte 24 thru 29)

Ÿ
ILI = 1 - This field contains zeros.
Ÿ
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 cylinder, 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 through 31)

Reserved fields are filled with zero.
Ultrastar 36LZX hard disk drive specifications
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