Section 5
SCSI Programming Guidelines
Table 5-12 Sense
E"or
Codes (cont.)
Sense
Key
(hex)
Additional
Sense
Code
Description
(hex)
B
E
00
40
47
48
49
00
AF
ABORTED COMMAND. The
ProDriv~
aborted the command. The initiator may
be able to recover by trying the command again.
No additional infonnation
Buffer RAM
parity
elTOr
Parity error on SCSI bus
Initiator detected
error
Inappropriateftllegal message
MISCOMP
ARE.
The source data dit not match the data read from the medium.
No additional infonnation
Buffer conupted
5.11.4
FORMAT UNIT COMMAND: OPCODE = 04(hex)
The FORMAT UNIT command (Table 5-13) assigns logical blocks to physical sectors for optimum
sequential access (within the limitations
of
available spare blocks), skipping known defective areas. An
option causes a repetitive (one byte) data pattern to be written in every block. The ProDrive is fonnatted
when shipped from the factory, with data being undefined.
NOTE: Issuing this command typically causes loss
of
data, even when the repetitive data pattern option is
not used. All data should be backed up prior to fonnatting.
5.11.4.1 Command Structure
TABLE 5-13 FORMAT UNIT Command
Bit
7
I
6
I
5
I
4
I
3
I
2
I
1
I
0
Byte
0
OPCODE= 04H
1
LUN=O
I
FMl'DAT
I CMPI.ST I
DEFECT
LIST
FORMAT
2
DATA
PAlTFRN
3-4 (MSB)
INTfRLEA
VE
=
XX
(LSB)
S
VU=O
I
RESERVED
= 0
I
F
I
L
FMTDAT·
FORMAT
DATA
(Byte 1, Bit
4)
- Set
to
one indicates that defective block data
is supplied during the DATA
OUT
phase. The defect list included with this data specifies the defects
that will
be entered onto the defect map. The defect list refers to the current block length and current
logical block addresses (not physical addresses). The fonnat
of
the defect list is shown in Table
S-
IS. A FMTDAT bit
of
zero indicates that the DATA
OUT
phase will not occur, i.e., no defect list
header and no defect data shall
be supplied by the initiator. See Table 5-15.
5-28
SCSI Programming Guidelines
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