Physical Error Record (Byte 24 Thru 29); Reserved (Byte 30 Through 31); Figure 216. Sense Data Byte 21 For Smart Alert Reason Code - IBM IC35L036UWDY10 - Ultrastar 36.7 GB Hard Drive Specifications

12.2.12.3 PFA Warning (Sense Code 5Dh)
When PFA Warning occurs (Sense Code 5Dh), the Vendor Unique Error information byte 21 will contain
the following reason code.
Sense Data
PFA Alert Reason
Byte 21
05h
Power On Hour Warning
08h
Thermal Sense Warning
14h
Spare Sector Availability Warning
32h Read Error Rate exceeding the threshold
43h Seek Error Rate exceeding the threshold
4Ah Write Error Rate exceeding the threshold
50h Load/Unload Cycles Count Warning
56h Spin Up Time Warning
5Bh Spin Up Retry Count Warning
FFh False Report caused by Test (Mode Page 1C)

Figure 216. Sense Data Byte 21 for SMART ALERT Reason Code

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 FFh for sector numbers greater than 254 or if the sector number is undetermined.
If the head is undetermined, its value is to FFh. If the cylinder value is undetermined, byte 24 and 25
are set to FFFFh. If the sector number is undetermined, bytes 27, 28, and 29 are all set to FFh. If
cylinder, head, and sector have no relevance to the error, bytes 24 through 29 will all be set to FFh.
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 146Z10 hard disk drive specifications
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