Autodocs
Devices:
trackdisk.device
CMD_CLEAR
CMD_READ
CMD_UPDATE
CMD_WRITE
TD_ADDCHANGEINT
TD_CHANGENUM
TD_CHANGESTATE
TD_EJECT
TD_FORMAT
TD_GETDRIVETYPE
TD_GETGEOMETRY
TD_GETNUMTRACKS
TD_MOTOR
TD_PROTSTATUS
TD_RAWREAD
TD_RAWWRITE
TD_REMCHANGEINT
TD_SEEK
Include
GuruMeditation
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Docs » Autodocs » trackdisk.device » TD_SEEK
TD_SEEK/ETD_SEEK -- control positioning of the drive heads.
These commands are currently provided for internal diagnostics,
disk repair, and head cleaning only.
TD_SEEK and ETD_SEEK move the drive heads to the track specified. The
io_Offset field should be set to the (byte) offset to which the seek is
to occur. TD_SEEK and ETD_SEEK do not verify their position until the
next read. That is, they only move the heads; they do not actually read
any data.
IO REQUEST INPUT
io_Device preset by the call to OpenDevice()
io_Unit preset by the call to OpenDevice()
io_Command TD_SEEK or ETD_SEEK
io_Flags 0 or IOF_QUICK
io_Offset byte offset from the start of the disk describing
where to move the head to.
iotd_Count (ETD_SEEK only) maximum allowable change counter
value.
IO REQUEST RESULT
io_Error - 0 for success, or an error code as defined in
<devices/trackdisk.h>
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