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Ron
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 Posted: Sun Feb 25, 2007 10:01 am Post subject: Some CDs don't mount reliably |
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We make distribution CDs of documentation by burning iso files created
with the mkisofs command on solaris. A CD made this way with one set of
PDF files mounts fine every time on an Ultra 10. One with other PDFs
mounts unreliably at best. The PDFs themselves seem to be fine. And all
CDs mount fine on PC and OS9 Mac. How do I troubleshoot this?
Thx,
Ron |
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Ian Collins
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| Posted: Sun Feb 25, 2007 10:28 am Post subject: Re: Some CDs don't mount reliably |
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Ron wrote:
| Quote: | We make distribution CDs of documentation by burning iso files created
with the mkisofs command on solaris. A CD made this way with one set of
PDF files mounts fine every time on an Ultra 10. One with other PDFs
mounts unreliably at best. The PDFs themselves seem to be fine. And all
CDs mount fine on PC and OS9 Mac. How do I troubleshoot this?
Swap the drive? |
--
Ian Collins. |
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Ron T.
Guest
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| Posted: Mon Feb 26, 2007 9:27 pm Post subject: Re: Some CDs don't mount reliably |
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Ian Collins <ian-news@hotmail.com> wrote:
| Quote: | Ron wrote:
We make distribution CDs of documentation by burning iso files created
with the mkisofs command on solaris. A CD made this way with one set of
PDF files mounts fine every time on an Ultra 10. One with other PDFs
mounts unreliably at best. The PDFs themselves seem to be fine. And all
CDs mount fine on PC and OS9 Mac. How do I troubleshoot this?
Swap the drive?
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The behavior is the same on 3 different Ultra 10s; CD containing one set
of PDFs mounts fine first time, other kind struggles every time. It's
not the type of media or the drive.
R |
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Huge
Guest
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| Posted: Mon Feb 26, 2007 9:38 pm Post subject: Re: Some CDs don't mount reliably |
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On 2007-02-26, Ron T. <RonTheGuy@null.com> wrote:
| Quote: | Ian Collins <ian-news@hotmail.com> wrote:
Ron wrote:
We make distribution CDs of documentation by burning iso files created
with the mkisofs command on solaris. A CD made this way with one set of
PDF files mounts fine every time on an Ultra 10. One with other PDFs
mounts unreliably at best. The PDFs themselves seem to be fine. And all
CDs mount fine on PC and OS9 Mac. How do I troubleshoot this?
Swap the drive?
The behavior is the same on 3 different Ultra 10s; CD containing one set
of PDFs mounts fine first time, other kind struggles every time. It's
not the type of media or the drive.
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I think it's the drives, plural. The CD-ROMs in older Sun workstations
seem to be very flakey. I have no idea why.
--
Ignorance more frequently begets confidence than does knowledge: it is those
who know little, not those who know much, who so positively assert that this
or that problem will never be solved by science.
[email me at huge {at} huge (dot) org <dot> uk] |
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Casper H.S. Dik
Guest
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| Posted: Mon Feb 26, 2007 10:12 pm Post subject: Re: Some CDs don't mount reliably |
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Huge <Huge@nowhere.much.invalid> writes:
| Quote: | I think it's the drives, plural. The CD-ROMs in older Sun workstations
seem to be very flakey. I have no idea why.
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Well, they're old, mechanical and sensitive to dust and dirt.
(In my experience, optical drives are the components most likely to fail)
Casper |
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Ron
Guest
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| Posted: Fri Mar 02, 2007 11:06 am Post subject: Re: Some CDs don't mount reliably |
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John D Groenveld <groenvel@cse.psu.edu> wrote:
| Quote: | In article <45e30702$0$320$e4fe514c@news.xs4all.nl>, Casper H.S. Dik
Casper.Dik@Sun.COM> wrote: >Well, they're old, mechanical and sensitive
to dust and dirt.
Joerg Schilling suggested that one might try cleaning the lense:
URL:http://groups.google.com/groups?selm=dp3o4r%24nr4%241%40news.cs.tu-be
rlin.de
John groenveld@acm.org
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I'd agree if only one workstation had problems, but I've seen the same
thing with three different Ultra 10s. Some CDs mount right up, no
problem. Others (the problem disks we know about contain similar files)
mount with trouble or not at all.
Ron |
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Ian Collins
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| Posted: Sat Mar 03, 2007 11:34 am Post subject: Re: Some CDs don't mount reliably |
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Ron wrote:
| Quote: | John D Groenveld <groenvel@cse.psu.edu> wrote:
In article <45e30702$0$320$e4fe514c@news.xs4all.nl>, Casper H.S. Dik
Casper.Dik@Sun.COM> wrote: >Well, they're old, mechanical and sensitive
to dust and dirt.
Joerg Schilling suggested that one might try cleaning the lense:
URL:http://groups.google.com/groups?selm=dp3o4r%24nr4%241%40news.cs.tu-be
rlin.de
John groenveld@acm.org
I'd agree if only one workstation had problems, but I've seen the same
thing with three different Ultra 10s. Some CDs mount right up, no
problem. Others (the problem disks we know about contain similar files)
mount with trouble or not at all.
Ron
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Try swapping at least one drive, they must be getting on for 10 years
old. For a noise level cost, you will at least rule the drives out as
the cause.
--
Ian Collins. |
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DoN. Nichols
Guest
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| Posted: Sat Mar 03, 2007 11:35 am Post subject: Re: Some CDs don't mount reliably |
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According to Ron <RonTheGuy@null.com>:
| Quote: | John D Groenveld <groenvel@cse.psu.edu> wrote:
In article <45e30702$0$320$e4fe514c@news.xs4all.nl>, Casper H.S. Dik
Casper.Dik@Sun.COM> wrote: >Well, they're old, mechanical and sensitive
to dust and dirt.
Joerg Schilling suggested that one might try cleaning the lense:
URL:http://groups.google.com/groups?selm=dp3o4r%24nr4%241%40news.cs.tu-be
rlin.de
John groenveld@acm.org
I'd agree if only one workstation had problems, but I've seen the same
thing with three different Ultra 10s. Some CDs mount right up, no
problem. Others (the problem disks we know about contain similar files)
mount with trouble or not at all.
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Are you *sure* that the blanks are from the same manufacturer?
Often the vendor will change actual manufacturer between batches, so
some form that vendor will work and others won't work.
Have you tried re-burning those using the stock of blanks which
produced the most recent trouble-free ones?
The older drives *can* well be sensitive to the underlying media
materials.
What system are you using to burn the CD-ROMs? If you use
"cdrecord" on the Suns you get a summary of actual media type prior to
burning, while if you use "cdrw" you don't. Both come with Solaris 10,
FWIW.
And I'm using an IDE DVD burner on my Ultra-60. It is done with
the help of a bridge card from Acard.
Also, I've swapped IDE DVC burners into Ultra-5 and Ultra-10
machines with very good results, which includes the ability to boot from
burned CD-ROMS which the original CD-ROM drive would not boot.
Enjoy,
DoN.
--
Email: <dnichols@d-and-d.com> | Voice (all times): (703) 938-4564
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero --- |
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