link in handbook appears to be broken

Ted Mittelstaedt tedm at
Sun Jun 5 22:48:07 GMT 2005

>-----Original Message-----
>From: owner-freebsd-questions at
>[mailto:owner-freebsd-questions at]On Behalf Of Steven
>Sent: Sunday, June 05, 2005 8:20 AM
>To: Ted Mittelstaedt
>Cc: freebsd-questions at
>Subject: Re: link in handbook appears to be broken
>On Saturday 04 June 2005 01:04 am, Ted Mittelstaedt wrote:
>> Hi Steven
>>   Please don't waste time with this.  development of burncd is pretty
>> much
>> dead.  Even the CD's on the list that it supported (of which
>I have one)
>> often didn't work right.  And all of them are old, no longer in
>> production.
>> burncd is there so if you have a burner sitting around you can plug
>> it in and see if it works.
>>   These days most people use the ATAPI/CAM driver with IDE
>burners, see:
>> Ted
>Ok, but I'm getting nearly the same error with cdrecord.
>cdrecord -blank=all -eject dev=toshiba seemed to work ok.
>cdrecord dev=toshiba cd1.iso didn't complain
>but then mount /cdrom produced
>acd0: READ_BIG - MEDIUM ERROR asc=0x15 ascq=0x00 error=0x00
>Can someone tell me where to find the meanings of these codes?

What you see is what you get - the error "MEDIUM ERROR" seems pretty
clear to me - it means that the CD you burned isn't readable.  What
are you after - a masters thesis spewed out for every little error?
That would bloat the code.

FreeBSD tells you there's an error it's your job to find out why
there is one.

Since as you said in your other posting you are making good CD's at
low-speed burn, and frizbees at high speed burn, there is a good chance
are underrunning the buffer in the burner.  Get a faster CPU or live with
lower speed burns.

UNIX is a preemptive operating system.  That means that during your CD
burn, if something else goes on in the system by some other process,
then your burning process gets paused.  If the burner you are using has
a very small internal buffer than it will run out of data and you will
produce a frisbee.

WinXP by contrast lets apps like Roxio basically halt the OS while
your doing some time-critical operation.  That's fine for a single-user
OS but pretty stupid for a server what has lots of people using it
all the time.  That is why people don't use WinXP for servers.

You cna try playing with the nice command and your cd burns and see if
you can make any difference.


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