Defect Descriptor - IBM Ultrastar 36LZX Specifications

Ÿ STPF (Stop Format) bit must be set to one. If one or both of the following conditions occurs, the
Target terminates the Format Unit command with Check Condition Status. The sense key is set to
Medium Error and the additional sense code is set to either Defect List Not Found if the first con-
dition occurred or it is set to Defect List Error if the second condition occurred.
1. The Target cannot locate a required defect list nor determine that the list exists.
2. The Target encounters an unrecoverable error while accessing a required defect list.
Ÿ IP (Initialization Pattern) bit must be set to zero. The Target initializes all data with zeros.
Ÿ DSP (Disable Saving Parameters) bit must be set to zero. The Target saves all the Mode Select
savable parameters during the format operation.
Ÿ Immed (Immediate) bit set to zero requests that status be returned at the end of the format oper-
ation. An immediate bit set to one requests that status be returned immediately. Good Status is
returned following the CDB validation and transfer of data in the Data Out phase. If the immediate
format operation terminates in error, Deferred Error Sense data is generated. With the immediate bit
set to one, the Link bit must be set to zero.

8.4.2 Defect descriptor

The Defect List Length field specifies the total length in bytes of the defect descriptors that follow. The
Target has an implementation limitation for the number of defect descriptors. The number of defect
descriptors shall be less than 128. The defect list length must be equal to four times the number of
defect descriptors to follow for the BLOCK format or eight times the number of defect descriptors to
follow for the BYTES FROM INDEX and PHYSICAL SECTOR format. Otherwise the command is
terminated with Check Condition Status, the sense key is set to Illegal Request, and the additional sense
code is set to Invalid Field In Parameter List. The defect descriptors must specify the defect based on
the current Format Device parameters reported by the Mode Sense command.
The Target supports three Defect List formats.
8.4.2.1 Block format
The Block format of the defect list supported by the drive is by logical block where the location of defect-
ive sectors is given by their LBA.
Byte
7 6
(MSB)
0
1
Defective Logical Block Address
2
3
4n -
Defective Logical Block Address n
4n +3
Figure 52. Defect descriptor - Block format.
Format of the defect list sent during the data out phase when FmtData set to one.
Bit
5 4 3
Ultrastar 36LZX hard disk drive specifications
2 1 0
(LSB)
61