HP C2488A Technical Reference Manual page 65

Format Unit
Defect List
The defect list consists of a 4-byte header followed by zero or more 8-byte defect descriptors.
Each descriptor consists of an 8-byte physical address or bytes from index address. Each
address is bounds-checked by the Target. If any address is out of bounds, an ILLEGAL
REQUEST Sense Key is generated, and the format operation is discontinued.
FORMAT UNIT Defect List Header Format .
Bit
Byte
7
I
6
I
1)
I
4
I
3
I
2
I
1
I
0
00
Reserved
01 FOV
I
DPRY
I
DCRT
I
STPF
I
IP=O
I
DSP
I
IMED=O
I
VU=o
02-03 (MSB=02) Defect List Length (LSB=03)
FOV (Format Options Valid). If the FOV bit is set to one (1), the drive will accept a DPRY
(Disable Primary), DCRT (Disable Certification), STPF (Stop Format) and/or DSP (Disable
Saving Parameter) bites) set to one (1). All other options must be set to zero (0).
DPRY (Disable Primary). A DPRY bit of zero (0) indicates that Target will not use portions
of the media identified as defective in the Plist for Initiator addressable logic blocks. If the
Target cannot locate the Plist or it cannot determine if a Plist exists, it will perform the
action specified by the STPF bit. A DPRY bit of one (1) indicates that the target will not use
the Plist to identify defective areas of the media. The Plist is not deleted.
nCRT (Disable Certification). A DCRT bit of zero (0) indicates that the Target will perform
a media certification operation to generate a Clist. A DCRT bit of one (1), indicates that the
target will not perform any media certification process or format verification operation while
executing the FORMAT UNIT command.
STPF (Stop Format). The STPF bit controls the behavior of the Target when one of the
following events occurs:
1. The Target has requested the use of the Plist (DPRY is set to zero), or the Glist (CMPLST
is set to zero) and the Target cannot locate the list or determine whether the list exists.
2. The target has been requested to use the Plist (DPRY is set to zero) or the Glist
(CMPLST is set to zero), and the Target encounters an error while accessing the Dlist.
A STPF bit of zero (0) indicates that, if one or both of the above conditions occurs, the
Target will continue to execute the FORMAT UNIT command. The Target will return
CHECK CONDITION status at the completion of the FORMAT UNIT command. The Sense
Key will be set to RECOVERED ERROR and the Additional Sense Code will be set to either
DEFECT LIST NOT FOUND if condition 1 described above occurs, or DEFECT LIST
ERROR if condition 2 occurs.
A STPF bit of one (1) indicates that, if one or both of the above conditions occurs, the Target
will terminate the FORMAT UNIT command with a status of CHECK CONDITION, a
Sense Key of MEDIA ERROR, and an Additional Sense Code of either DEFECT LIST NOT
FOUND if condition 1 occurred, or DEFECT LIST ERROR if condition 2 occurred.
IP (Initialization Pattern). The IP bit must be set to zero (0), indicating that no
Initialization Pattern will be sent. The Target will use its default initialization pattern when
it formats the media.
DRAFT
SCSI Command Descriptions A-9
1/18/93 09:58