Write (10) Command Descriptor Block-Data Format; Write (10) Command-Field Descriptions - Maxtor ATLAS 10K III Product Manual

The WRITE (10) command requests that the drive write initiator-supplied data to the
medium. The data format and field descriptions are shown in Table 5-214 and Table
5-215 respectively.
T a b l e 5 - 2 1 4 WRITE (10) Command Descriptor Block-Data Format
$ K V
 
$ [ V G
0
1 Reserved
2 - 5
6
7 - 8
9
T a b l e 5 - 2 1 5 WRITE (10) Command-Field Descriptions
( K G N F
Disable Page Out. When the value of the field is 1, the drive tells the control-
ler to bypass cache as much as possible. The buffers used for the WRITE
data are given a low priority. This bit may be useful if the host CPU is per-
forming a background copy operation and does not want to wipe out the
drive's cache.
DPO
When DPO is 0, the drive tells the controller to cache this WRITE data in a
normal manner.
NOTE: The drive normally assigns a low priority to write caching. Therefore,
the DPO bit in a WRITE command is ignored.
Force Unit Access. When 1, the data must be written on the medium before
GOOD status is returned. When 0, GOOD status may be returned after the
data is fetched from the initiator and before it is written to the medium. If
FUA
the WCE (Write Cache Enable) bit on the MODE SELECT command Caching
Page is clear, the FUA bit is ignored and behaves as if it were always set (that
is, if WCE = 0, the controller forces FUA = 1).
Logical Block
The address of the first logical block where the Write operation will occur.
Address
Relative Address. This drive does not support this feature; the field must be
RelAdr
0.
The number of contiguous logical blocks of data to write. The drive returns
Transfer CHECK CONDITION status with the correct sense data if the specified trans-
Length fer would cause the write operation to extend beyond the Logical Block Ad-
dress space.
  
Operation Code (2Ah)
DPO FUA
Logical Block Address
Reserved
Transfer Length
Control
& G U E T K R V K Q P
SCSI Description
 
Reserved RelAdr
Maxtor Atlas 10K III

5-171