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Write Stream Pio (3Bh) - Hitachi T7K250 - Deskstar - Hard Drive Specifications

3.5 inch ultra ata/133 hard disk drive, 3.5 inch serial ata hard disk drive
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12.59 Write Stream PIO (3Bh)

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
Error Register
7
6
5
CRC UNC
0
V
V
0
This command writes from 1 to 65536 sectors as specified in the Sector Count register. A sector count of 0
requests 65536 sectors.
If the Write Continuous bit is set to one, the device shall not stop execution of the command due to errors. If the
WC bit is set to one and errors occur in the transfer or writing of the data, the device shall continue to transfer the
amount of data requested and then provide ending status with the BSY bit cleared to zero, the SE bit set to one, the
ERR bit cleared to zero, and the type of error, IDNF, or ABRT, reported in the error log. If the WC bit is set to one
and the Command Completion Time Limit expires, the device shall stop execution of the command and provide
ending status with BSY bit cleared to zero, the SE bit set to one, the ERR bit cleared to zero, and report the fact that
the Command Completion Time Limit expired by setting the CCTO bit in the error log to one, In all cases, the
device shall attempt to transfer the amount of data requested within the Command Completion Time Limit event if
some data transferred is in error.
Output parameters to the device
Feature Current
URG (bit 7)
WC (bit 6)
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
1 1 1 D - - - -
0 0 1 1 1 0 1 1
4
3
2
1
IDN
0
ABT T0N AMN
V
0
V
0
URG specifies an urgent transfer request. The Urgent bit specifies that the command
should be completed in the minimum possible time by the device and shall be completed
within the specified Command Completion Time Limit.
WC specifies Write Continuous mode enabled. If the Write Continuous bit is set to one,
the device shall not stop execution of the command due to errors.
Deskstar T7K250 Hard Disk Drive Specification
Command Block Input Registers
Register
Data Low
Data High
Error
HOB=0
Sector
Count
HOB=1
HOB=0
Sector
Number
HOB=1
HOB=0
Cylinder
Low
HOB=1
Cylinder
HOB=0
HOB=1
High
Device/Head
Status
0
7
6
5
BSY RDY DF DSC DRQ
V
0
V
V
239
7 6 5 4 3 2 1 0
- - - - - - - -
- - - - - - - -
see below
- - - - - - - -
- - - - - - - -
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
- - - - - - - -
See below ...
Status Register
4
3
2
1
COR IDX
V
-
0
-
0
ERR
V
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