CMD_WRITE

write sectors of data to a disk, with 64 bit offset

This command transfer data from a supplied buffer to a disk.

io_Device

preset by the call to OpenDevice()

io_Unit

preset by the call to OpenDevice()

io_Command

TD_WRITE64

io_Flags

0 or IOF_QUICK

io_Data

pointer to the buffer where the data should be put

io_Length

number of bytes to write, must be a multiple of the disk block size.

io_Offset

low 32 bits of the byte offset from the start of the disk describing where to write data to, must be the disk block size.

io_Actual

high 32 bits of the byte offset.

io_Error

0 for success, or an error code as defined in <devices/trackdisk.h>

Some incarnations of the scsi.device, namely those that handle actually IDE devices, were unable to write more than 255 blocks in one go. This bug has been fixed in V47.

TD_WRITE64, TD_READ64, TD_FORMAT64