Format Unit Parameter List; Defect List Header - Seagate SCSI Interface Product Manual

SCSI Interface Product Manual, Rev. J
5.5.2

Format Unit parameter list

The defect list shown in Table 41 contains a four byte header followed by one or more defect descriptors (Table
45). The Defect List Length in each table specifies the total length in bytes of the defect descriptors that follow.
In Table 41 the Defect List Length is equal to eight times the number of defect descriptors.
Table 40: Format Unit parameter list
Bit 7
Byte
[1]

Defect List Header

[2] Initialization Pattern Descriptor
[3] Defect Descriptor(s)
[1] See Table 41.
[2] See Table 42.
[3] See Tables 45, 46, and 47.
5.5.2.1 Defect List header
Table 41: Defect List header
Bit 7
Byte
0 Reserved
1 FOV [1]
2 (MSB)
3
Notes.
[1] Format Options Valid (FOV). If one, the drive interprets the remaining bits of byte 1. If zero, the drive
checks the remaining bits of byte 1 for zeros.
[2] Disable Primary (DPRY). If one, flaws in the drive P list are not reallocated during formatting. This means
existing reallocations of the P list are canceled and no new reallocations made during formatting. The P
list is retained. Some Seagate drives do not support a DPRY bit of one. See individual drive's Product
Manual, Volume 1.
If zero, flaws in the drive P list are reallocated during formatting. A Check Condition is sent in the status if
the P list cannot be found by the drive.
[3] Disable Certification (DCRT). If one, the drive does not perform a verify function during formatting (thus no
C list for this format is created or reallocated).
If zero, the drive performs a verify function during formatting and reallocates any sector that fails the verify
(i.e., a C list is created and these flaws reallocated).
On drives that have MR heads, the DCRT bit is always interpreted as 0 when the user sets the IP bit (see
Table 41) and specifies a format pattern of greater than 1 byte (see Table 42), and/or if the IP Modifier bits
are set to 01 or 10 (see Table 42). This is done since the user format pattern and/or IP header is written
onto the media during the format certification phase. Because of this the user may see G list entries
added to the defect list even though the DCRT bit was set to 1.
[4] Stop Format (STPF). If one, formatting is terminated with a Check Condition status if an error is encoun-
tered while accessing either the P or G defect list. The sense key is set to Medium Error and the additional
sense code shall be set to either Defect List Not Found or Defect List Error.
If zero, formatting is not terminated if an error is encountered while accessing either the P or G defect list.
6 5
6 5
DPRY [2] DCRT [3]
4 3
4 3
STPF [4] IP [5]
Defect List Length [9]
2 1
2 1
DSP [6] Immed [7]
83
0
0
VS [8]
(LSB)