Automatic power down sequence
A hard reset will disable the automatic power down sequence.
Format track
A drive will not perform a physical format. Instead, it will simply
write a data pattern of all zeros to the sectors which have been
specified by the Format Track command.
Format track interleave factor
The drive only supports an interleave factor of 1:1, and may ignore
any other specified interleave, without returning an error.
Write long
Write long command should be executed for the same sector after Read
long command execution. Otherwise, unexpected ECC correctable error
may occur, because of the limitation of the emulation technique to
support 4 byte ECC mode which is implemented in the drive.
Seek overlap
The drive will wait for the seek to complete before interrupting the
host. Therefore, no seek overlap can occur. This will be transparent
to the host except that performance may be degraded in certain
environments where the host could perform other work while waiting
for seek complete, such as multi-tasking operating systems.
Sleep mode
During sleep mode the drive will be activated by any command,
including, but not limited to, a soft reset.
Drive/head register
Bits 5 and 7 of drive/head register are not written to 0. (These 2
bits are always read as '1' even after host writes to '0'...).
Sleep/standby/idle mode
When entering sleep, standby or idle mode as a result of a command,
the busy bit in the status register will remain set until the
transition to the new state is complete. |
