Write Dma Fua Ext (3Dh) - Hitachi T7K250 - Deskstar - Hard Drive Specifications

12.48 Write DMA FUA Ext (3Dh)

Command Block Output Registers
Register
Data Low
Data High
Current
Feature
Previous
Current
Sector
Count
Previous
Current
Sector
Number
Previous
Current
Cylinder
Low
Previous
Cylinder Current
Previous
High
Device/Head
Command
7 6 5
CRC UNC 0
V 0 0
The Write DMA FUA Ext command transfers one or more sectors of data from the host to the device, and then the
data is written to the disk media. This command provides the same function as the Write DMA Ext command
except that the transferred data shall be written to the media before the ending status for this command is reported
also when write caching is enabled.
The sectors of data are transferred through the Data Register 16 bits at a time.
The host initializes a slave-DMA channel prior to issuing the command. Data transfers are qualified by DMARQ
and are performed by the slave-DMA channel. The device issues only one interrupt per command to indicate that
data transfer has terminated and status is available.
If an unrecoverable error occurs, the write will be terminated at the failing sector.
Output parameters to the device
Sector Count Current The number of continuous sectors to be transferred low order, bits (7:0).
Sector Count Previous The number of continuous sectors to be transferred high order bits (15:8). If zero is speci-
Sector Number CurrentLBA (7:0)
Sector Number PreviousLBA (31:24)
Cylinder Low Current LBA (15:8)
Cylinder Low PreviousLBA (39:32)
Cylinder High CurrentLBA (23:16)
7 6 5 4 3 2 1 0
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
V V V V V V V V
V V V V V V V V
V V V V V V V V
V V V V V V V V
V V V V V V V V
V V V V V V V V
V V V V V V V V
V V V V V V V V
- 1 - D - - - -
0 0 1 1 1 1 0 1
Error Register
4 3 2 1
IDN 0 ABT T0N AMN
V 0 V 0
fied in the Sector Count register, then 65,536 sectors will be transferred.
Deskstar T7K250 Hard Disk Drive Specification
Command Block Input Registers
Register
Data Low
Data High
Error
Sector
Count
Sector
Number
Cylinder
Low
Cylinder
High
Device/Head
Status
0 7 6
BSY RDY DF DSC DRQ
0 0 V
218
7 6 5 4 3 2 1 0
- - - - - - - -
- - - - - - - -
see below
HOB=0 - - - - - - - -
HOB=1 - - - - - - - -
HOB=0 V V V V V V V V
HOB=1 V V V V V V V V
HOB=0 V V V V V V V V
HOB=1 V V V V V V V V
HOB=0 V V V V V V V V
HOB=1 V V V V V V V V
- - - - - - - -
See below ...
Status Register
5 4 3 2
COR IDX
0 V - 0
1 0
ERR
- V