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6.6
WRITE (0A H )
BIT
BYTE
07
06
05
04
03
02
01
00
------1------1------1------1------1------1------1------
00
0
0
0
0 '
1
0
1
0
01
Logical unit Number
(MSB)
Logical Block Address
02
Loglcal Block Address
03
Logical Block Address
(LSB)
04
Number of Blocks
05
Reserved
(0)
1
Flag
1
Link
Figure 6-12.
WRITE Command
This command transfers to the selected ST 506 drive on the ACB-
5500 the required
number of blocks starting at the specified
logical block address.
The controller seeks to the specified
logical starting block. If disconnection is allowed, the ACB-5500
will disconnct during seek actuator motion and will ,reconnect
when the device is again ready to transfer data.
When the seek
is complete, the controller transfers the first block into its
buffer and writes the buffered data and its associated ECC into
the first logical sector.
Subsequent blocks of data are transferred
until the block count
is decremented to zero.
Cylinder, head switching, and defect
skipping are transparent to the user.
500504-00
6-20
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