* [TUHS] Recovering flaky CDs
@ 2007-10-31 18:19 James Petts
2007-10-31 18:28 ` asbesto
0 siblings, 1 reply; 13+ messages in thread
From: James Petts @ 2007-10-31 18:19 UTC (permalink / raw)
> ----- Original Message -----
> From: "Wilko Bulte" <wb at freebie.xs4all.nl>
> To: asbesto <asbesto at freaknet.org>
> Subject: Re: [TUHS] Recovering flaky CDs
> Date: Wed, 31 Oct 2007 19:09:11 +0100
>
>
> Quoting asbesto, who wrote on Wed, Oct 31, 2007 at 05:47:36PM +0100 ..
> > Wed, Oct 31, 2007 at 08:25:00AM -0800, James Petts wrote:
> >
> > > > > > Is there anybody on this list who knows a way of
> > recovering flaky CDs?
> > > > > Easiest first step is try using different kinds of
> > CD/CD-R/DVD-R drives.
> > > > > I have found some 'unreadable' CDs could be read using a DVD drive.
> > > > I remember a very old SONY cd-rom reader capable of reading very
> > > > damaged cd! It was the SONY CDU-33A, it has his
> > > > own controller, so was not an IDE or SCSI drive. But it can be
> > > Those CD Doctor "cleaners" (they actually do a minor
> > > resurfacing of the disc) have rescued several discs
> > > for me.
> >
> > A great problem I had some time ago was a sort of oxydation of the
> > cd material; this seem to happen using very bad cd brands. i had
>
> Note that the reflecting layer in factory produced CDs is aluminium.
> A thin layer of lacquer is protecting the reflector.
>
> As an interesting eye opening experiment I dumped one of these AOL promo CDs
> we used to be bombarded with in a bowl of lukewarm water. Plain water, 25
> degrC. Within a day the aluminium layer had holes in it the size of dimes.
> Apparantly the protective lacquer was very substandard.
>
> El-cheapo CDR can have similar characteristics.
And it is the top side (label side) of the CD that is most
fragile, not the reading side. There is about 0.5 mm of
plastic that can take some pretty fearsome scratches and
still be readable, or at least resurfaceable (is that a
word?).
^ permalink raw reply [flat|nested] 13+ messages in thread
* [TUHS] Recovering flaky CDs
2007-10-31 18:19 [TUHS] Recovering flaky CDs James Petts
@ 2007-10-31 18:28 ` asbesto
2007-10-31 19:43 ` Wilko Bulte
0 siblings, 1 reply; 13+ messages in thread
From: asbesto @ 2007-10-31 18:28 UTC (permalink / raw)
Wed, Oct 31, 2007 at 10:19:05AM -0800, James Petts wrote:
> > > A great problem I had some time ago was a sort of oxydation of the
> > > cd material; this seem to happen using very bad cd brands. i had
> > degrC. Within a day the aluminium layer had holes in it the size of dimes.
> > Apparantly the protective lacquer was very substandard.
> And it is the top side (label side) of the CD that is most
> fragile, not the reading side. There is about 0.5 mm of
YES - and the oxidation I had was on the top "label" side,
affecting also the reading side :(
p.s.
the lack of "reply-to" in this mailing list is very, very
annoying, because it generate a lot of duplicates.
8(
--
[ 73 de IW9HGS : freaknet medialab : radiocybernet : poetry hacklab]
[ http://freaknet.org/asbesto - http://papuasia.org/radiocybernet ]
[ NON SCRIVERMI USANDO LETTERE ACCENTATE! - NON MANDARMI ALLEGATI ]
[ *I DELETE* EMAIL > 100K, ATTACHMENTS, HTML, M$-WORD DOC and SPAM ]
^ permalink raw reply [flat|nested] 13+ messages in thread
* [TUHS] Recovering flaky CDs
2007-10-31 18:28 ` asbesto
@ 2007-10-31 19:43 ` Wilko Bulte
0 siblings, 0 replies; 13+ messages in thread
From: Wilko Bulte @ 2007-10-31 19:43 UTC (permalink / raw)
Quoting asbesto, who wrote on Wed, Oct 31, 2007 at 07:28:46PM +0100 ..
> Wed, Oct 31, 2007 at 10:19:05AM -0800, James Petts wrote:
>
> > > > A great problem I had some time ago was a sort of oxydation of the
> > > > cd material; this seem to happen using very bad cd brands. i had
>
> > > degrC. Within a day the aluminium layer had holes in it the size of dimes.
> > > Apparantly the protective lacquer was very substandard.
> > And it is the top side (label side) of the CD that is most
> > fragile, not the reading side. There is about 0.5 mm of
>
> YES - and the oxidation I had was on the top "label" side,
> affecting also the reading side :(
Yep, the protective lacquer is on the label/top side. The bottom
part aka the disc itself is polycarbonate (IIRC)
> p.s.
>
> the lack of "reply-to" in this mailing list is very, very
> annoying, because it generate a lot of duplicates.
procmail is you friend. At least it is my friend ;)
Wilko
^ permalink raw reply [flat|nested] 13+ messages in thread
* [TUHS] Recovering flaky CDs
2007-11-01 8:03 ` Jochen Kunz
@ 2007-11-01 13:11 ` Pete Turnbull
0 siblings, 0 replies; 13+ messages in thread
From: Pete Turnbull @ 2007-11-01 13:11 UTC (permalink / raw)
On 01/11/2007 08:03, Jochen Kunz wrote:
> On Wed, 31 Oct 2007 10:56:29 -0600 (MDT)
> Warner Losh <imp at bsdimp.com> wrote:
>
>> I've used cdparanoia to recover badly damaged audio disks. Are there
>> not similar programs for data disks?
> cdrdao can do similar things for audio and data disks.
Yes, cdrdao uses the cdparanoia libraries for reading.
--
Pete Peter Turnbull
Network Manager
University of York
^ permalink raw reply [flat|nested] 13+ messages in thread
* [TUHS] Recovering flaky CDs
2007-10-31 16:56 ` Warner Losh
2007-10-31 17:15 ` Angus Robinson
@ 2007-11-01 8:03 ` Jochen Kunz
2007-11-01 13:11 ` Pete Turnbull
1 sibling, 1 reply; 13+ messages in thread
From: Jochen Kunz @ 2007-11-01 8:03 UTC (permalink / raw)
[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain, Size: 329 bytes --]
On Wed, 31 Oct 2007 10:56:29 -0600 (MDT)
Warner Losh <imp at bsdimp.com> wrote:
> I've used cdparanoia to recover badly damaged audio disks. Are there
> not similar programs for data disks?
cdrdao can do similar things for audio and data disks.
--
tschüß,
Jochen
Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/
^ permalink raw reply [flat|nested] 13+ messages in thread
* [TUHS] Recovering flaky CDs
2007-10-31 17:15 ` Angus Robinson
@ 2007-11-01 7:59 ` Wesley Parish
0 siblings, 0 replies; 13+ messages in thread
From: Wesley Parish @ 2007-11-01 7:59 UTC (permalink / raw)
On Thursday 01 November 2007 06:15, Angus Robinson wrote:
> Warner Losh wrote:
> > From: "James Petts" <jpetts at operamail.com>
> > Subject: Re: [TUHS] Recovering flaky CDs
> > Date: Wed, 31 Oct 2007 08:25:00 -0800
> >
> >>> ----- Original Message -----
> >>> From: asbesto <asbesto at freaknet.org>
> >>> To: "Al Kossow" <aek at bitsavers.org>
> >>> Subject: Re: [TUHS] Recovering flaky CDs
> >>> Date: Wed, 31 Oct 2007 10:22:33 +0100
> >>>
> >>> Tue, Oct 30, 2007 at 04:26:14PM -0700, Al Kossow wrote:
> >>>>> Is there anybody on this list who knows a way of recovering flaky
> >>>>> CDs?
> >>>>
<snip>
> >>
> >> Those CD Doctor "cleaners" (they actually do a minor
> >> resurfacing of the disc) have rescued several discs
> >> for me.
> >
> > I've used cdparanoia to recover badly damaged audio disks. Are there
> > not similar programs for data disks?
> >
> > Warner
>
> Dont know how true it is but the local paper here was running a story
> about some students using goverment condoms to fix scratched cd's. They
> worked for 3 uses. Never tried it as most of the stuff i have on cd i
> can get again.
Ignoring the inevitable ribald humour arising from the concept - "supersized,
for all the government d*ckheads" ... ;)
A friend of mine suggested using a silver polisher to resurface the plastic
when the scratches prevent it from being readable, but I've never tried it.
Wesley Parish
>
> Regards,
> Angus
>
> > _______________________________________________
> > TUHS mailing list
> > TUHS at minnie.tuhs.org
> > https://minnie.tuhs.org/mailman/listinfo/tuhs
--
Clinersterton beademung, with all of love - RIP James Blish
-----
Gaul is quartered into three halves. Things which are
impossible are equal to each other. Guerrilla
warfare means up to their monkey tricks.
Extracts from "Schoolboy Howlers" - the collective wisdom
of the foolish.
-----
Mau e ki, he aha te mea nui?
You ask, what is the most important thing?
Maku e ki, he tangata, he tangata, he tangata.
I reply, it is people, it is people, it is people.
^ permalink raw reply [flat|nested] 13+ messages in thread
* [TUHS] Recovering flaky CDs
2007-10-31 16:47 ` asbesto
@ 2007-10-31 18:09 ` Wilko Bulte
0 siblings, 0 replies; 13+ messages in thread
From: Wilko Bulte @ 2007-10-31 18:09 UTC (permalink / raw)
Quoting asbesto, who wrote on Wed, Oct 31, 2007 at 05:47:36PM +0100 ..
> Wed, Oct 31, 2007 at 08:25:00AM -0800, James Petts wrote:
>
> > > > > Is there anybody on this list who knows a way of recovering flaky CDs?
> > > > Easiest first step is try using different kinds of CD/CD-R/DVD-R drives.
> > > > I have found some 'unreadable' CDs could be read using a DVD drive.
> > > I remember a very old SONY cd-rom reader capable of reading very
> > > damaged cd! It was the SONY CDU-33A, it has his
> > > own controller, so was not an IDE or SCSI drive. But it can be
> > Those CD Doctor "cleaners" (they actually do a minor
> > resurfacing of the disc) have rescued several discs
> > for me.
>
> A great problem I had some time ago was a sort of oxydation of the
> cd material; this seem to happen using very bad cd brands. i had
Note that the reflecting layer in factory produced CDs is aluminium.
A thin layer of lacquer is protecting the reflector.
As an interesting eye opening experiment I dumped one of these AOL promo CDs
we used to be bombarded with in a bowl of lukewarm water. Plain water, 25
degrC. Within a day the aluminium layer had holes in it the size of dimes.
Apparantly the protective lacquer was very substandard.
El-cheapo CDR can have similar characteristics.
Wilko
^ permalink raw reply [flat|nested] 13+ messages in thread
* [TUHS] Recovering flaky CDs
2007-10-31 16:56 ` Warner Losh
@ 2007-10-31 17:15 ` Angus Robinson
2007-11-01 7:59 ` Wesley Parish
2007-11-01 8:03 ` Jochen Kunz
1 sibling, 1 reply; 13+ messages in thread
From: Angus Robinson @ 2007-10-31 17:15 UTC (permalink / raw)
Warner Losh wrote:
> From: "James Petts" <jpetts at operamail.com>
> Subject: Re: [TUHS] Recovering flaky CDs
> Date: Wed, 31 Oct 2007 08:25:00 -0800
>
>
>>> ----- Original Message -----
>>> From: asbesto <asbesto at freaknet.org>
>>> To: "Al Kossow" <aek at bitsavers.org>
>>> Subject: Re: [TUHS] Recovering flaky CDs
>>> Date: Wed, 31 Oct 2007 10:22:33 +0100
>>>
>>>
>>> Tue, Oct 30, 2007 at 04:26:14PM -0700, Al Kossow wrote:
>>>
>>>
>>>>> Is there anybody on this list who knows a way of recovering flaky CDs?
>>>>>
>>>> Easiest first step is try using different kinds of CD/CD-R/DVD-R drives.
>>>> I have found some 'unreadable' CDs could be read using a DVD drive.
>>>>
>>> I remember a very old SONY cd-rom reader capable of reading very
>>> damaged cd! It was the SONY CDU-33A, it has his
>>> own controller, so was not an IDE or SCSI drive. But it can be
>>> connected to an old soundcard like Spectrum or other similars,
>>> having some cdrom interfaces.
>>>
>>> sorry for my bad english :)
>>>
>>>
>>>
>> Those CD Doctor "cleaners" (they actually do a minor
>> resurfacing of the disc) have rescued several discs
>> for me.
>>
>
> I've used cdparanoia to recover badly damaged audio disks. Are there
> not similar programs for data disks?
>
> Warner
>
Dont know how true it is but the local paper here was running a story
about some students using goverment condoms to fix scratched cd's. They
worked for 3 uses. Never tried it as most of the stuff i have on cd i
can get again.
Regards,
Angus
> _______________________________________________
> TUHS mailing list
> TUHS at minnie.tuhs.org
> https://minnie.tuhs.org/mailman/listinfo/tuhs
>
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^ permalink raw reply [flat|nested] 13+ messages in thread
* [TUHS] Recovering flaky CDs
2007-10-31 16:25 James Petts
2007-10-31 16:47 ` asbesto
@ 2007-10-31 16:56 ` Warner Losh
2007-10-31 17:15 ` Angus Robinson
2007-11-01 8:03 ` Jochen Kunz
1 sibling, 2 replies; 13+ messages in thread
From: Warner Losh @ 2007-10-31 16:56 UTC (permalink / raw)
From: "James Petts" <jpetts@operamail.com>
Subject: Re: [TUHS] Recovering flaky CDs
Date: Wed, 31 Oct 2007 08:25:00 -0800
> > ----- Original Message -----
> > From: asbesto <asbesto at freaknet.org>
> > To: "Al Kossow" <aek at bitsavers.org>
> > Subject: Re: [TUHS] Recovering flaky CDs
> > Date: Wed, 31 Oct 2007 10:22:33 +0100
> >
> >
> > Tue, Oct 30, 2007 at 04:26:14PM -0700, Al Kossow wrote:
> >
> > > > Is there anybody on this list who knows a way of recovering flaky CDs?
> > > Easiest first step is try using different kinds of CD/CD-R/DVD-R drives.
> > > I have found some 'unreadable' CDs could be read using a DVD drive.
> >
> > I remember a very old SONY cd-rom reader capable of reading very
> > damaged cd! It was the SONY CDU-33A, it has his
> > own controller, so was not an IDE or SCSI drive. But it can be
> > connected to an old soundcard like Spectrum or other similars,
> > having some cdrom interfaces.
> >
> > sorry for my bad english :)
> >
> >
>
> Those CD Doctor "cleaners" (they actually do a minor
> resurfacing of the disc) have rescued several discs
> for me.
I've used cdparanoia to recover badly damaged audio disks. Are there
not similar programs for data disks?
Warner
^ permalink raw reply [flat|nested] 13+ messages in thread
* [TUHS] Recovering flaky CDs
2007-10-31 16:25 James Petts
@ 2007-10-31 16:47 ` asbesto
2007-10-31 18:09 ` Wilko Bulte
2007-10-31 16:56 ` Warner Losh
1 sibling, 1 reply; 13+ messages in thread
From: asbesto @ 2007-10-31 16:47 UTC (permalink / raw)
Wed, Oct 31, 2007 at 08:25:00AM -0800, James Petts wrote:
> > > > Is there anybody on this list who knows a way of recovering flaky CDs?
> > > Easiest first step is try using different kinds of CD/CD-R/DVD-R drives.
> > > I have found some 'unreadable' CDs could be read using a DVD drive.
> > I remember a very old SONY cd-rom reader capable of reading very
> > damaged cd! It was the SONY CDU-33A, it has his
> > own controller, so was not an IDE or SCSI drive. But it can be
> Those CD Doctor "cleaners" (they actually do a minor
> resurfacing of the disc) have rescued several discs
> for me.
A great problem I had some time ago was a sort of oxydation of the
cd material; this seem to happen using very bad cd brands. i had
this horrible problems with "SEANTRAM" and "PRINCO" cd's; the
princo cd was literally unreadable after only 6 months of age!
--
[ 73 de IW9HGS : freaknet medialab : radiocybernet : poetry hacklab]
[ http://freaknet.org/asbesto - http://papuasia.org/radiocybernet ]
[ NON SCRIVERMI USANDO LETTERE ACCENTATE! - NON MANDARMI ALLEGATI ]
[ *I DELETE* EMAIL > 100K, ATTACHMENTS, HTML, M$-WORD DOC and SPAM ]
^ permalink raw reply [flat|nested] 13+ messages in thread
* [TUHS] Recovering flaky CDs
@ 2007-10-31 16:25 James Petts
2007-10-31 16:47 ` asbesto
2007-10-31 16:56 ` Warner Losh
0 siblings, 2 replies; 13+ messages in thread
From: James Petts @ 2007-10-31 16:25 UTC (permalink / raw)
> ----- Original Message -----
> From: asbesto <asbesto at freaknet.org>
> To: "Al Kossow" <aek at bitsavers.org>
> Subject: Re: [TUHS] Recovering flaky CDs
> Date: Wed, 31 Oct 2007 10:22:33 +0100
>
>
> Tue, Oct 30, 2007 at 04:26:14PM -0700, Al Kossow wrote:
>
> > > Is there anybody on this list who knows a way of recovering flaky CDs?
> > Easiest first step is try using different kinds of CD/CD-R/DVD-R drives.
> > I have found some 'unreadable' CDs could be read using a DVD drive.
>
> I remember a very old SONY cd-rom reader capable of reading very
> damaged cd! It was the SONY CDU-33A, it has his
> own controller, so was not an IDE or SCSI drive. But it can be
> connected to an old soundcard like Spectrum or other similars,
> having some cdrom interfaces.
>
> sorry for my bad english :)
>
>
Those CD Doctor "cleaners" (they actually do a minor
resurfacing of the disc) have rescued several discs
for me.
^ permalink raw reply [flat|nested] 13+ messages in thread
* [TUHS] Recovering flaky CDs
2007-10-30 23:26 ` [TUHS] Recovering flaky CDs Al Kossow
@ 2007-10-31 9:22 ` asbesto
0 siblings, 0 replies; 13+ messages in thread
From: asbesto @ 2007-10-31 9:22 UTC (permalink / raw)
Tue, Oct 30, 2007 at 04:26:14PM -0700, Al Kossow wrote:
> > Is there anybody on this list who knows a way of recovering flaky CDs?
> Easiest first step is try using different kinds of CD/CD-R/DVD-R drives.
> I have found some 'unreadable' CDs could be read using a DVD drive.
I remember a very old SONY cd-rom reader capable of reading very
damaged cd! It was the SONY CDU-33A, it has his
own controller, so was not an IDE or SCSI drive. But it can be
connected to an old soundcard like Spectrum or other similars,
having some cdrom interfaces.
sorry for my bad english :)
--
[ 73 de IW9HGS : freaknet medialab : radiocybernet : poetry hacklab]
[ http://freaknet.org/asbesto - http://papuasia.org/radiocybernet ]
[ NON SCRIVERMI USANDO LETTERE ACCENTATE! - NON MANDARMI ALLEGATI ]
[ *I DELETE* EMAIL > 100K, ATTACHMENTS, HTML, M$-WORD DOC and SPAM ]
^ permalink raw reply [flat|nested] 13+ messages in thread
* [TUHS] Recovering flaky CDs
2007-10-30 22:36 ` [TUHS] Recovering flaky CDs (was: mach & nextstep.) Greg 'groggy' Lehey
@ 2007-10-30 23:26 ` Al Kossow
2007-10-31 9:22 ` asbesto
0 siblings, 1 reply; 13+ messages in thread
From: Al Kossow @ 2007-10-30 23:26 UTC (permalink / raw)
Greg 'groggy' Lehey wrote:
> Is there anybody on this list who knows a way of recovering flaky CDs?
>
Easiest first step is try using different kinds of CD/CD-R/DVD-R drives.
I have found some 'unreadable' CDs could be read using a DVD drive.
^ permalink raw reply [flat|nested] 13+ messages in thread
end of thread, other threads:[~2007-11-01 13:11 UTC | newest]
Thread overview: 13+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2007-10-31 18:19 [TUHS] Recovering flaky CDs James Petts
2007-10-31 18:28 ` asbesto
2007-10-31 19:43 ` Wilko Bulte
-- strict thread matches above, loose matches on Subject: below --
2007-10-31 16:25 James Petts
2007-10-31 16:47 ` asbesto
2007-10-31 18:09 ` Wilko Bulte
2007-10-31 16:56 ` Warner Losh
2007-10-31 17:15 ` Angus Robinson
2007-11-01 7:59 ` Wesley Parish
2007-11-01 8:03 ` Jochen Kunz
2007-11-01 13:11 ` Pete Turnbull
2007-10-11 13:14 [TUHS] mach & nextstep Jose R. Valverde
2007-10-30 22:36 ` [TUHS] Recovering flaky CDs (was: mach & nextstep.) Greg 'groggy' Lehey
2007-10-30 23:26 ` [TUHS] Recovering flaky CDs Al Kossow
2007-10-31 9:22 ` asbesto
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