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kern/119618: Double Density Disks do not work correctly

>Number:         119618
>Category:       kern
>Synopsis:       Double Density Disks do not work correctly
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun Jan 13 05:50:02 UTC 2008
>Originator:     Brad Allen
>Release:        7.0-RC1 i386
FreeBSD pc.braddo 7.0-RC1 FreeBSD 7.0-RC1 #2: Sat Jan  5 16:04:10 EST 2008     root_(_at_)_pc_(_dot_)_braddo:/usr/obj/usr/src/sys/CUSTOM  i386
Double Density disks generally do not work, they fail to mount with an input/output error and if a format is attempted the drive sounds as if it's reading from track 0 to 79 trying to find the other half of the non-existant high density disk.

On the very odd occasion that they do work, it is EXTREMELY slow (at least 2 minutes to copy a file of a few kilobytes) because it seems to be seeking from the start to the end of the disk repeatedly.
Try to format or mount a double density disk.

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