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

The READ (10) command requests that data be transferred from the drive to the
initiator. The amount of data transferred is specified by the transfer length field. The
starting point is specified by the logical sector address. The data format and field
descriptions are shown in Table 5-127 and Table 5-128 respectively.
T a b l e 5 - 1 2 7 READ (10) Command-Data Format
$ K V

$ [ V G
0
1
2 - 5
6
7 - 8
9
T a b l e 5 - 1 2 8 READ (10) Command-Field Descriptions
( K G N F
DPO
FUA
RelAdr
Logical Block Address
Transfer Length
 
Operation Code (28h)
Reserved
Logical Block Address
Disable Page Out. When the value is 0, the drive caches the data read,
using its normal Logical Read Unit policies.
When the value is 1, the drive assigns to logical blocks accessed by the
READ (10) command the lowest priority for being fetched into or retained
by the cache.
Force Unit Access. When the value is 0, the drive is allowed to satisfy the
read with cache-resident data.
A value of 1 indicates that the drive accesses the media in performing the
command before returning GOOD status.
Relative Addressing. The drive does not support relative addressing. Must
be 0
Specifies the logical sector address where the read operation will begin.
Specifies the number of contiguous logical blocks of data to transfer. A
transfer length of 0 indicates that no logical blocks are to be transferred.
Any other value indicates the number of logical blocks to be transferred.
The drive returns a CHECK CONDITION status with the correct sense data
if the specified transfer extends beyond the logical sector space.
  
DPO FUA Reserved
Reserved
Transfer Length
Control
& G U E T K R V K Q P
Maxtor Atlas 10K III
SCSI Description
 
RelAdr
5-107