- If UDMA 2 is failing try UDMA 1 first, it helps in some cases
- downgrade if we get an error in the first 4000 xfers, or if we get
4 errors in 4000 xfers if the first 4000 went without troubles.
While I'm there commit a local change I have since some time to get my CD
probed: issue a "blanck" IDENTIFY before the one used to detect slave ghosts,
with my drive the first IDENTIFY following a controller reset fails with an
aborted command ...
This is an attempt to allow people to change the default configuration
to try harder at 'mounting' a tape. This allows you to specify, in
seconds, the amount of time a non-control unit open will retry
(once per second) the scsipi_test_unit_ready when it tries to mount
the tape. It also turns off the over-verbose error reporting at
this time unless SCSIDEBUG is set.
The reason this is not enabled as a default is that it's a large change
of behaviour. I find it useful to 'try harder' at mounting a tape in
the tape driver, particularly when loaded via a media changer device
rather than specifying the delays in the backup program.
succeeds, note that we now are valid.
- Don't attempt to try and run initialize element status from interrupt level-
we don't really support that yet. Also, key more correctly off of ASC/ASCQ
instead of just the sense key.
- Make the practice of doing an INITIALIZE ELEMENT STATUS automatically when
we get params (from chopen time even) a policy decision that is not the
default for now- this can be a dangerous practice as well as time consuming.
It's dangerous in that you can have a hung open when all you really want
to do is do a read of parameters- and parameters, including slot status,
are perfectly fine to read even before an INITIALIZE ELEMENT STATUS is
done- all the elements whos status your read are going to be marked with
an exception- so leave it up to the application to decide how important
this is.
LiViD DVD player. (See forthcoming mail to current-users.)
XXX NOTE: We should do something to probe capabilities, rather than allowing
these ioctls on any device.
- `flags' is now gone, replaced with `xs_control' and `xs_status'.
- Massive cleanup of the control flags. Now we explicitly say that
a job is to complete asynchronously, rather than relying on side-effects,
and use a new flag to now that device discovery is being performed.
- Do SCSI device discovery interrupt-driven.
- Take note of magazine changes, and enqueue "Element Status Changed" events
that user processes can read or select on.
- Normalize some structure names.
- Report back more status about changer elements:
* Volume tags (e.g. barcode labels on the backs of your tapes)
* External device names (for drive units in a changer)
* Last element a unit of media was moved from
* Sense information for SCSI changer elements in EXCEPT condition
* Vendor-specific data if the user requests it.
- Add support for setting volume tags.
drochner