#3 verify support missing

[David A. Gatwood]

After formatting is complete, the driver should provide a way for the
application to verify that the disk was formatted correctly.

[David A. Gatwood]

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The driver was recently modified to do a verification after formatting.
However, this solution is less than ideal. Ideally, the format code should
not attempt to verify the format, since a failed verify is not necessarily a
failed format. Also, you should be able to call the verify code from
outside the driver (i.e. from a user application). Finally, the verify code
should not return success or failure. Instead, it should return either a list
of bad blocks on the media (or an empty list if the format was
successful). That way, after a user application does a format call and a
verify call, it can then pass a bad block list to the appropriate newfs
program and ensure that those blocks are "spared".

This bug is marked "postponed", since the ideal implementation requires
additional support from the I/O Kit. When no higher priority bugs remain,
a quick hack workaround might be done just to be able to ship a decent
format tool. However, this is a low priority.