Seagate Medalist 2160N (ST52160N), Product Manual

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Bytes
Bits
7 6 5 4 3 2 1 0
0 0 0 1 0 1 0 0 0
1 LUN DPO FUA 0 0 0
2–5 Logical block address
6 0 0 0 0 0 0 0 0
7–8 Transfer length
9 0 0 0 0 0 0 0 0
Byte 1 If the disable page out (DPO) bit is 1, the cached data that
the drive receives during this command has the lowest
priority for being retained in the cache. If the DPO is 0, the
cached data has the highest priority for being retained in
the cache.
If the forced unit access (FUA) bit is 1, the drive must access
the disc to get the data requested by the initiator, even if the
data is available in the cache. If the FUA bit is 0, the drive
can get the data from the cache or the disc.
Bytes 2–5 The
logical block address specifies the logical block where
the read operation begins.
Bytes 7–8 The transfer length specifies the number of contiguous
logical blocks of data to be transferred. A transfer length of
0 means that no logical blocks are to be transferred. This
condition is not considered an error.
3.6.3 Write (10) command (2A
H
)
When the drive receives the Write (10) command, the drive writes the
data from the initiator to the disc. This command is the same as the Write
(6) command, except that the CDB for this command contains a 4-byte
logical block address and a 2-byte transfer length. For more information
about the Write (6) command, see Section 3.4.7 on page 46.
If there is a reservation access conflict, this command terminates with a
reservation conflict status and no data is written. For more information
about the reservation conflict status, see Section 3.2. on page 35.
Medalist Pro 2160N/2160WC Product Manual, Rev. A 65