kern/72703: Detection of Mitsumi FX4820T CDROM

Jason Bacon jbacon at
Fri Jun 15 22:13:19 UTC 2007

I have a 4830T, which I believe had exhibited the same problems, on 
6.2-RELEASE now, and it's not giving me any trouble.  The others I have 
are in systems still running 5.4-RELEASE.

If I recall correctly, the problem only occurred if there were two 
drives on the channel.  I got in the habit of replacing the Mitsumi 
drives instead of just adding a DVD drive, to avoid the problem.  I 
haven't had many problems with these drives when they're used alone.

I haven't seen the atapicam issue with these drives in 5.4 or later.

I think this PR can be closed.  I submitted it mainly to advertise the 
workaround anyway.



Master: acd0 <FX4830T/R02C> ATA/ATAPI revision 0
Slave:       no device present

Gavin Atkinson wrote:
> Synopsis: Detection of Mitsumi FX4820T CDROM
> State-Changed-From-To: open->feedback
> State-Changed-By: gavin
> State-Changed-When: Thu Jun 14 17:42:28 UTC 2007
> State-Changed-Why: 
> To submitter: Is this still an issue on more recent versions of
> FreeBSD?  Have you tried using the CD ROM drive directly to rule
> atapicam out?

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