[TUHS] TUHS Digest, Vol 43, Issue 1

Thu Nov 1 18:50:42 AEST 2007

Hi,

I have the same problem with an old floppy disk (2,5). Any Ideas what I 
can do?

Thanks a lot and kid regards,

Christopher

On Thu, 1 Nov 2007, tuhs-request at minnie.tuhs.org wrote:

> Date: Thu, 01 Nov 2007 12:00:01 +1000
> From: tuhs-request at minnie.tuhs.org
> Reply-To: tuhs at minnie.tuhs.org
> To: tuhs at minnie.tuhs.org
> Subject: TUHS Digest, Vol 43, Issue 1
> 
> Send TUHS mailing list submissions to
> 	tuhs at minnie.tuhs.org
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>
> Today's Topics:
>
>   1. Re: Recovering flaky CDs (asbesto)
>   2. Re: Recovering flaky CDs (James Petts)
>   3. Re: Recovering flaky CDs (asbesto)
>   4. Re: Recovering flaky CDs (Warner Losh)
>   5. Re: Recovering flaky CDs (Angus Robinson)
>   6. Re: Recovering flaky CDs (Wilko Bulte)
>   7. Re: Recovering flaky CDs (James Petts)
>   8. Re: Recovering flaky CDs (asbesto)
>   9. Re: Recovering flaky CDs (Wilko Bulte)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 31 Oct 2007 10:22:33 +0100
> From: asbesto <asbesto at freaknet.org>
> Subject: Re: [TUHS] Recovering flaky CDs
> To: Al Kossow <aek at bitsavers.org>
> Cc: tuhs at minnie.tuhs.org
> Message-ID: <20071031092233.GC14989 at freaknet.org>
> Content-Type: text/plain; charset=iso-8859-15
>
> 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 ]
>
>
>
> ------------------------------
>
> Message: 2
> Date: Wed, 31 Oct 2007 08:25:00 -0800
> From: "James Petts" <jpetts at operamail.com>
> Subject: Re: [TUHS] Recovering flaky CDs
> To: asbesto <asbesto at freaknet.org>
> Cc: tuhs at minnie.tuhs.org
> Message-ID: <20071031162500.832803AA648 at ws5-8.us4.outblaze.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
>> ----- 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.
>
>
>
> ------------------------------
>
> Message: 3
> Date: Wed, 31 Oct 2007 17:47:36 +0100
> From: asbesto <asbesto at freaknet.org>
> Subject: Re: [TUHS] Recovering flaky CDs
> To: James Petts <jpetts at operamail.com>
> Cc: tuhs at minnie.tuhs.org
> Message-ID: <20071031164736.GB22786 at freaknet.org>
> Content-Type: text/plain; charset=iso-8859-15
>
> 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 ]
>
>
>
> ------------------------------
>
> Message: 4
> Date: Wed, 31 Oct 2007 10:56:29 -0600 (MDT)
> From: Warner Losh <imp at bsdimp.com>
> Subject: Re: [TUHS] Recovering flaky CDs
> To: jpetts at operamail.com
> Cc: tuhs at minnie.tuhs.org, asbesto at freaknet.org
> Message-ID: <20071031.105629.104123720.imp at bsdimp.com>
> Content-Type: Text/Plain; charset=us-ascii
>
> 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
>
>
> ------------------------------
>
> Message: 5
> Date: Wed, 31 Oct 2007 19:15:09 +0200
> From: Angus Robinson <angus at fairhaven.za.net>
> Subject: Re: [TUHS] Recovering flaky CDs
> To: Warner Losh <imp at bsdimp.com>
> Cc: tuhs at minnie.tuhs.org, asbesto at freaknet.org
> Message-ID: <4728B81D.40304 at fairhaven.za.net>
> Content-Type: text/plain; charset="iso-8859-1"
>
>
>
> 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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>
> ------------------------------
>
> Message: 6
> Date: Wed, 31 Oct 2007 19:09:11 +0100
> From: Wilko Bulte <wb at freebie.xs4all.nl>
> Subject: Re: [TUHS] Recovering flaky CDs
> To: asbesto <asbesto at freaknet.org>
> Cc: tuhs at minnie.tuhs.org
> Message-ID: <20071031180911.GA25151 at freebie.xs4all.nl>
> Content-Type: text/plain; charset=us-ascii
>
> 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
>
>
> ------------------------------
>
> Message: 7
> Date: Wed, 31 Oct 2007 10:19:05 -0800
> From: "James Petts" <jpetts at operamail.com>
> Subject: Re: [TUHS] Recovering flaky CDs
> To: "Wilko Bulte" <wb at freebie.xs4all.nl>
> Cc: tuhs at minnie.tuhs.org
> Message-ID: <20071031181905.28E003AA646 at ws5-8.us4.outblaze.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
>
>> ----- 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?).
>
>
>
> ------------------------------
>
> Message: 8
> Date: Wed, 31 Oct 2007 19:28:46 +0100
> From: asbesto <asbesto at freaknet.org>
> Subject: Re: [TUHS] Recovering flaky CDs
> To: James Petts <jpetts at operamail.com>
> Cc: Wilko Bulte <wb at freebie.xs4all.nl>, tuhs at minnie.tuhs.org
> Message-ID: <20071031182845.GA24966 at freaknet.org>
> Content-Type: text/plain; charset=iso-8859-15
>
> 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 ]
>
>
>
> ------------------------------
>
> Message: 9
> Date: Wed, 31 Oct 2007 20:43:56 +0100
> From: Wilko Bulte <wb at freebie.xs4all.nl>
> Subject: Re: [TUHS] Recovering flaky CDs
> To: asbesto <asbesto at freaknet.org>
> Cc: tuhs at minnie.tuhs.org
> Message-ID: <20071031194356.GA25839 at freebie.xs4all.nl>
> Content-Type: text/plain; charset=us-ascii
>
> 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
>
>
> ------------------------------
>
> _______________________________________________
> TUHS mailing list
> TUHS at minnie.tuhs.org
> https://minnie.tuhs.org/mailman/listinfo/tuhs
>
>
> End of TUHS Digest, Vol 43, Issue 1
> ***********************************
>

Dr. Christopher Bahn
Center for Urban and Real Estate Management (CUREM)

Programme Manager
Schanzeneggstr. 1
8002 Zuerich
Switzerland
Phone: 0041-44-2089998
Fax:0041-44-2089990

cbbahn at sdf.lonestar.org
SDF Public Access UNIX System - http://sdf.lonestar.org