Deskstar 7K80 Hard Disk Drive Specification
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12.2 Configure Stream (51h)
Table 74: Configure Stream (51h)
The Configure Stream command specifies the operating parameters of an individual stream. A Configure Stream
command may be issued for each stream that is to be added or removed from the current operating configuration. If
A/R = 1 and the specified ID is already valid at the device, the new parameters shall replace the old parameters,
unless Command Abort is returned (see abort conditions for Error Register). In this case the old parameters for the
specified Stream ID shall remain in effect.
Output Parameters To The Device
Command Block Output Registers Command Block Input Registers
Register 7 6 5 4 3 2 1 0 Register 7 6 5 4 3 2 1 0
Data Low - - - - - - - - Data Low - - - - - - - -
Data High - - - - - - - - Data High - - - - - - - -
Feature
Current V V - - - V V V
Error see below
Previous V V V V V V V V
Sector
Count
Current V V V V V V V V
Sector
Count
HOB=0 - - - - - - - -
Previous V V V V V V V V HOB=1 - - - - - - - -
Sector
Number
Current - - - - - - - -
Sector
Number
HOB=0 - - - - - - - -
Previous - - - - - - - - HOB=1 - - - - - - - -
Cylinder
Low
Current - - - - - - - -
Cylinder
Low
HOB=0 - - - - - - - -
Previous - - - - - - - - HOB=1 - - - - - - - -
Cylinder
High
Current - - - - - - - - Cylinder
High
HOB=0 - - - - - - - -
Previous - - - - - - - - HOB=1 - - - - - - - -
Device/Head 1 1 1 D - - - - Device/Head - - - - - - - -
Command 0 1 0 1 0 0 0 1 Status See below ...
Error Register Status Register
7654321 0 76543 21 0
CRC UNC 0 IDN 0 ABT T0N AMN BSY RDY DF DSC DRQ COR IDX ERR
00000V0 0 0V0V- 0- V
Feature Current bit 7 (A/R) If set to one, a request to add a new stream. If cleared to
zero, a request to remove a previous configured stream is
specified.
Feature Current bit 6 (R/W) R/W specifies a read stream if cleared to zero and a
write stream if set to one.
Feature Current bit 0..2 (Stream ID) The Stream ID shall be a value between 0 and 7.
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