Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-27 Thread Fred Cisin via cctalk
Again, I've been misunderstood. I'm looking for an adapter that allows one to use standard size SD cards in a MicroSD slot. On Fri, 27 Jul 2018, Alexander Schreiber via cctalk wrote: I'm not very optimistic here, given that the µSD card end of such an adapter is going to be quite mechanically

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-27 Thread Carlo Pisani via cctalk
DVD-RAM: Is it a reliable technology? nobody has yet written about it :P

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-27 Thread Alexander Schreiber via cctalk
On Wed, Jul 25, 2018 at 04:28:54PM -0700, Chuck Guzis wrote: > On 07/25/2018 02:56 PM, Alexander Schreiber wrote: > > > Of course there are. Since both SD cards and µSD cards have identical > > electrical and protocol interfaces, those adapters are just passive pieces > > of plastic and wires. In

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-25 Thread Paul Berger via cctalk
On 2018-07-25 10:39 PM, Fred Cisin via cctalk wrote: For example, If I want to use a Micro-4/3 lens on a Leica bellows, then On Wed, 25 Jul 2018, Zane Healy wrote: Why would I want to use a Micro-4/3 lens on my Leica’s, will it even cover the 35mm frame (or full frame sensor)? I

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-25 Thread Fred Cisin via cctalk
For example, If I want to use a Micro-4/3 lens on a Leica bellows, then On Wed, 25 Jul 2018, Zane Healy wrote: Why would I want to use a Micro-4/3 lens on my Leica’s, will it even cover the 35mm frame (or full frame sensor)? I wouldn't. But, I'd like to use the leica BELLOWS on the digital

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-25 Thread Zane Healy via cctalk
> On Jul 25, 2018, at 3:43 PM, Fred Cisin via cctalk > wrote: > > For example, If I want to use a Micro-4/3 lens on a Leica bellows, then which > way is "TO"? Are we adapting the M4/3 lens to Leica bellows, or adapting > the Leica bellows to M4/2? You and I might know what we mean, but

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-25 Thread Chuck Guzis via cctalk
On 07/25/2018 04:37 PM, Fred Cisin via cctalk wrote: > Like this? : > https://www.ebay.com/itm/183299125079 That might have possibilities. I've ordered a couple of eBay item 362055535419, for 2 clams and change each. Same thing from Cathay. Thanks, Chuck

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-25 Thread Fred Cisin via cctalk
On Wed, 25 Jul 2018, Chuck Guzis via cctalk wrote: Again, I've been misunderstood. I'm looking for an adapter that allows one to use standard size SD cards in a MicroSD slot. I can find only one incarnation of this idea in a rather shoddy-locking hunk of F44 PCB with a uSD socket mounted on it.

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-25 Thread John Foust via cctalk
At 06:06 PM 7/25/2018, Fred Cisin via cctalk wrote: >and, in line with the treachery of descriptions of adapters, several of those >are micro-SD to micro-SD extenders, NOT size adapters! You can daisy-chain them. It helps get around the form factor and clearance issues. :-) - John

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-25 Thread Chuck Guzis via cctalk
On 07/25/2018 04:06 PM, Fred Cisin via cctalk wrote: > > and, in line with the treachery of descriptions of adapters, several of > those are micro-SD to micro-SD extenders, NOT size adapters! > > But, one of those has "other alternatives" that seem to be the right one. The ones with a ribbon

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-25 Thread Chuck Guzis via cctalk
On 07/25/2018 02:56 PM, Alexander Schreiber wrote: > Of course there are. Since both SD cards and µSD cards have identical > electrical and protocol interfaces, those adapters are just passive pieces > of plastic and wires. In fact, a lot of µSD cards sold these days come > packaged with a µSD to

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-25 Thread Fred Cisin via cctalk
Yes, micro-SD often comes with an adapter to use micro-SD in an SD slot. But are there adapters readily available to connect an SD card to a device that has a micro-SD slot? (">> for insertion of standard SD into mcroSD slots?") On Wed, 25 Jul 2018, John Foust via cctalk wrote: Wouldn't such

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-25 Thread Ali via cctalk
>Of course there are. Since both SD cards >and µSD cards have identical >electrical and protocol interfaces, those >adapters are just passive pieces >of plastic and wires. In fact, a lot of µSD >cards sold these days come I believe Chuck is looking for the other way SD to micros i.e. a size

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-25 Thread John Foust via cctalk
At 05:43 PM 7/25/2018, Fred Cisin via cctalk wrote: >Yes, micro-SD often comes with an adapter to use micro-SD in an SD slot. >But are there adapters readily available to connect an SD card to a device >that has a micro-SD slot? >(">> for insertion of standard SD into mcroSD slots?") Wouldn't

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-25 Thread Tapley, Mark via cctalk
> On Jul 25, 2018, at 4:56 PM, Alexander Schreiber via cctalk > wrote: > >> Are there such things as "microSD" to "standard SD" adapters that allows >> for insertion of standard SD into mcroSD slots? > > Of course there are. Since both SD cards and µSD cards have identical > electrical and

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-25 Thread Alexander Schreiber via cctalk
On Mon, Jul 23, 2018 at 10:54:26AM -0700, Chuck Guzis via cctalk wrote: > On 07/22/2018 09:05 PM, Warner Losh via cctalk wrote: > > Throughout this whole thread, I've been tempted to say that you get better > > data fidelity if you take a green magic marker and mark the edges of the > > disk... >

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-24 Thread Grant Taylor via cctalk
On 07/24/2018 12:42 PM, Eric Smith via cctalk wrote: I wrote a lot of DDS2 and DDS3 tapes back in the day. When my DDS3 drive broke, I got another drive. I found out that my first drive was seriously out of calibration, and though it could read its own tapes, other drives could not. All the

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-24 Thread Carlo Pisani via cctalk
I have a brand new DLT drive for sale brand new, it's SCSI, 2U 2018-07-24 20:42 GMT+02:00 Eric Smith via cctalk : > I wrote a lot of DDS2 and DDS3 tapes back in the day. When my DDS3 drive > broke, I got another drive. I found out that my first drive was seriously > out of calibration, and though

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-24 Thread Eric Smith via cctalk
I wrote a lot of DDS2 and DDS3 tapes back in the day. When my DDS3 drive broke, I got another drive. I found out that my first drive was seriously out of calibration, and though it could read its own tapes, other drives could not. All the data was gone. I'm considering getting an LTO drive, but I

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-24 Thread Zane Healy via cctalk
> On Jul 24, 2018, at 10:55 AM, Grant Taylor via cctalk > wrote: > >> On 7/21/18 9:14 AM, Carlo Pisani via cctalk wrote: >> what is your experience? > I personally have had reasonable success with CD-Rs. > > I used Verbatim Blue CD-Rs for general storage back when I had a single 6.4 > GB

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-24 Thread Grant Taylor via cctalk
On 7/21/18 9:14 AM, Carlo Pisani via cctalk wrote: what is your experience? I personally have had reasonable success with CD-Rs. I used Verbatim Blue CD-Rs for general storage back when I had a single 6.4 GB drive in '98. I have recently read the contents of all the surviving disks with no

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-24 Thread Grant Taylor via cctalk
On 7/23/18 9:51 AM, Alexander Schreiber via cctalk wrote: Another thing to keep in mind: it is nice if your backup medium lasts decades, but what about the reader for it? Will that be available down the road as well and usable? I seem to recall reading about a ""tape drive that wrote

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-24 Thread Grant Taylor via cctalk
On 7/22/18 2:06 PM, Zane Healy via cctalk wrote: I wouldn’t touch 4mm DAT tapes with a ten foot pole, if I can help it. I’ve used them in the past, but only in special cases, OR more importantly when forced to. I had reasonable success with DDS2 & DDS3 DATs back in the day. I routinely

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-24 Thread Grant Taylor via cctalk
On 7/23/18 12:00 PM, Geoffrey Oltmans via cctalk wrote: Probably a good idea to use something like RAR with parity. I know I have downloaded some multi-segment binaries in RAR format from usenet with several missing segments and as long as I had the parity file set it could successfully

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-24 Thread Carlo Pisani via cctalk
has anyone ever used Iomega Rev as backup media? how good is that? 2018-07-23 23:11 GMT+02:00 Ali via cctalk : >> Probably a good idea to use something like RAR with parity. I know I >> have >> downloaded some multi-segment binaries in RAR format from usenet with >> several missing segments

RE: how good is the data reliability with CD ROM and DVD RAM?

2018-07-23 Thread Ali via cctalk
> Probably a good idea to use something like RAR with parity. I know I > have > downloaded some multi-segment binaries in RAR format from usenet with > several missing segments and as long as I had the parity file set it > could > successfully recover the entire archive. Parity will only take

RE: how good is the data reliability with CD ROM and DVD RAM?

2018-07-23 Thread Fred Cisin via cctalk
Does anybody here have experience with "M-Disc"? It is available up to 100GB BDXL! Drives start at less than $100; media is prices vary - the 100GB starts at about $20 each, but the low capacity versions are bordering on competitive. On Mon, 23 Jul 2018, Ali wrote: I have used M-Disc to

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-23 Thread Zane Healy via cctalk
> On Jul 23, 2018, at 1:20 PM, Carlo Pisani via cctalk > wrote: > > what about DVD-RAM? > are they good about data-reliability? > > cost: > - SCSI DVD-RAM reader/writer, say about 180-240 euro, brand new > - DVD-RAM cartridge (disk + caddy), say about 20 euro per 5 disks, brand new > > how

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-23 Thread Carlo Pisani via cctalk
what about DVD-RAM? are they good about data-reliability? cost: - SCSI DVD-RAM reader/writer, say about 180-240 euro, brand new - DVD-RAM cartridge (disk + caddy), say about 20 euro per 5 disks, brand new how long does a DVD-RAM last? 4.5Gbyte per disk is ok for me, I need to archive my source

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-23 Thread TeoZ via cctalk
What kind of media is it DVD+R or DVD-R? I think DVD-R (Pioneer) came first and all the original DVD burners support it and it is the most reliable if you are making movies for older DVD players. DVD+R is a Sony and Phillips design and the recording format is different. The last generation

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-23 Thread Eric Smith via cctalk
On Mon, Jul 23, 2018 at 11:48 AM, Chuck Guzis via cctalk < cctalk@classiccmp.org> wrote: > I think that the use of tapes in the 23rd century justifies their > reputation for durability: > > http://memory-alpha.wikia.com/wiki/Microtape Very impressive, since Microtape was first sold in 1963, as

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-23 Thread allison via cctalk
On 07/23/2018 09:21 AM, Devin Monnens via cctech wrote: >> I have a lot of backup here stored in CDs, and I have recently bought >> an SCSI DVDRAM unit to create new backups in caddies DVD-RAMs (of >> 4.2Gbyte each) > > what is your experience? > > > I recently disposed of a couple hundred DVD

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-23 Thread Devin Monnens via cctalk
> > I have a lot of backup here stored in CDs, and I have recently bought > an SCSI DVDRAM unit to create new backups in caddies DVD-RAMs (of > 4.2Gbyte each) what is your experience? I recently disposed of a couple hundred DVD and CD backups I'd made. As mentioned in a previous comment, it's

RE: how good is the data reliability with CD ROM and DVD RAM?

2018-07-23 Thread Ali via cctalk
> Does anybody here have experience with "M-Disc"? > > It is available up to 100GB BDXL! > Drives start at less than $100; media is prices vary - the 100GB starts > at > about $20 each, but the low capacity versions are bordering on > competitive. Fred, I have used M-Disc to archive photos and

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-23 Thread Geoffrey Oltmans via cctalk
On Mon, Jul 23, 2018 at 12:54 PM, Chuck Guzis via cctalk < cctalk@classiccmp.org> wrote: > > IMIHO, a grievous error by making things too physically small. The > standard SD card is easy enough to pick out in a deep-pile carpet. Not > so, the usual black-colored MicriSD. The dog might well eat

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-23 Thread Geoffrey Oltmans via cctalk
On Sun, Jul 22, 2018 at 7:13 PM, Charles Dickman via cctalk < cctalk@classiccmp.org> wrote: > Below is a sampling of disks recorded between 2001 and 2009. It is > likely that the disks of the same type were from the same package > because I don't use many disks. They were stored without much

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-23 Thread Chuck Guzis via cctalk
On 07/22/2018 09:05 PM, Warner Losh via cctalk wrote: > Throughout this whole thread, I've been tempted to say that you get better > data fidelity if you take a green magic marker and mark the edges of the > disk... On the other hand, information on MicroSD cards is likely to end up in the sewer

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-23 Thread Chuck Guzis via cctalk
On 07/22/2018 09:05 PM, Warner Losh via cctalk wrote: > Throughout this whole thread, I've been tempted to say that you get better > data fidelity if you take a green magic marker and mark the edges of the > disk... > I think that the use of tapes in the 23rd century justifies their reputation

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-23 Thread Alexander Schreiber via cctalk
On Sun, Jul 22, 2018 at 08:06:24PM +0200, Carlo Pisani via cctalk wrote: > thus DDS4, LTO2, DLT: which is the best tape? If you even remotely care about your data, stay far away from DDS. In a previous job we used DDS3 tapes as system backup and restore tapes (since the machines could boot from

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-23 Thread Jules Richardson via cctalk
On 07/21/2018 10:14 AM, Carlo Pisani via cctalk wrote: hi yesterday I was shocked by a couple of videos on Youtube where guys pointed out their negative experiences with CD ROM and DVD RAM as media for their own backup. They complained their data completely lost after 5 years of storage in CD

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-23 Thread Peter Coghlan via cctalk
Grumpy Ol' Fred wrote: On Sun, 22 Jul 2018, Chuck Guzis via cctalk wrote: > I'd almost forgotten about that old chestnut. Fortunately, Snopes > remembers: > https://www.snopes.com/fact-check/bewaring-of-the-green/ But, what about using a gold USB cable? Only if it is pure gold. None of

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-22 Thread Fred Cisin via cctalk
On Sun, 22 Jul 2018, Chuck Guzis via cctalk wrote: I'd almost forgotten about that old chestnut. Fortunately, Snopes remembers: https://www.snopes.com/fact-check/bewaring-of-the-green/ But, what about using a gold USB cable? Surely the quality of the power filtration must make a difference.

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-22 Thread Chuck Guzis via cctalk
On 07/22/2018 09:05 PM, Warner Losh via cctalk wrote: > Of course, I know people here will get that old, tired meme... It got me > wondering, though, if anybody tested that hypothesis for longevity since > the marker would seal the edges... maybe :) I don't know about sealing anything, as the

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-22 Thread Warner Losh via cctalk
Throughout this whole thread, I've been tempted to say that you get better data fidelity if you take a green magic marker and mark the edges of the disk... Of course, I know people here will get that old, tired meme... It got me wondering, though, if anybody tested that hypothesis for longevity

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-22 Thread hollandia--- via cctalk
Is there any relationship betwween the SPEED at which laser-disks are written and the length of time that the recording will last? Kurt >> On Jul 22, 2018, at 6:47 PM, Chuck Guzis via cctalk >> wrote: >> >> On 07/22/2018 06:34 PM, Zane Healy via cctalk wrote: >> >>> On premises has the exact

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-22 Thread Zane Healy via cctalk
> On Jul 22, 2018, at 6:47 PM, Chuck Guzis via cctalk > wrote: > > On 07/22/2018 06:34 PM, Zane Healy via cctalk wrote: > >> On premises has the exact same problem as tape. You must have a refresh >> plan. That’s the advantage of off prem, you don’t have to worry about >> refresh. > > I

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-22 Thread Chuck Guzis via cctalk
On 07/22/2018 06:34 PM, Zane Healy via cctalk wrote: > On premises has the exact same problem as tape. You must have a refresh > plan. That’s the advantage of off prem, you don’t have to worry about > refresh. I don't exactly follow you. In the case of a specific example for NASA and its

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-22 Thread Zane Healy via cctalk
> On Jul 22, 2018, at 6:08 PM, Paul Koning wrote: > >> On Jul 22, 2018, at 4:06 PM, Zane Healy via cctalk >> wrote: >> >>> ... >> >> I’ve failed to see any reason behind your questions. If you’re looking for >> a long-term archival solution, look to cloud storage (either on-prem, or >>

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-22 Thread Chuck Guzis via cctalk
On 07/22/2018 05:46 PM, Warner Losh via cctalk wrote: > Somewhat of a tangent, but this just popped up for me. > > https://www.theatlantic.com/technology/archive/2018/07/microfilm-lasts-half-a-millennium/565643/ I read through to the end of the article and can't quite see where the 500 year

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-22 Thread Paul Koning via cctalk
> On Jul 22, 2018, at 4:06 PM, Zane Healy via cctalk > wrote: > >> ... > > I’ve failed to see any reason behind your questions. If you’re looking for a > long-term archival solution, look to cloud storage (either on-prem, or > off-prem). Sure tape is cheap, but when you start looking at

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-22 Thread Fred Cisin via cctalk
On Sun, 22 Jul 2018, Warner Losh via cctalk wrote: Somewhat of a tangent, but this just popped up for me. https://www.theatlantic.com/technology/archive/2018/07/microfilm-lasts-half-a-millennium/565643/ and I thought of this thread. Apologies if it's a duplicate.. Iff deliberately processed

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-22 Thread Paul Koning via cctalk
> On Jul 22, 2018, at 8:46 PM, Warner Losh via cctalk > wrote: > > Somewhat of a tangent, but this just popped up for me. > > https://www.theatlantic.com/technology/archive/2018/07/microfilm-lasts-half-a-millennium/565643/ > > and I thought of this thread. Apologies if it's a duplicate.. >

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-22 Thread Warner Losh via cctalk
Somewhat of a tangent, but this just popped up for me. https://www.theatlantic.com/technology/archive/2018/07/microfilm-lasts-half-a-millennium/565643/ and I thought of this thread. Apologies if it's a duplicate.. Warner On Sun, Jul 22, 2018 at 6:13 PM, Charles Dickman via cctalk <

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-22 Thread Charles Dickman via cctalk
Below is a sampling of disks recorded between 2001 and 2009. It is likely that the disks of the same type were from the same package because I don't use many disks. They were stored without much care, but in a spaces tolerable to humans for reasonable periods. Imation CD-Rrecorded

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-22 Thread Zane Healy via cctalk
> On Jul 22, 2018, at 11:06 AM, Carlo Pisani via cctalk > wrote: > > thus DDS4, LTO2, DLT: which is the best tape? I wouldn’t touch 4mm DAT tapes with a ten foot pole, if I can help it. I’ve used them in the past, but only in special cases, OR more importantly when forced to. You can’t buy

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-22 Thread Carlo Pisani via cctalk
thus DDS4, LTO2, DLT: which is the best tape? 2018-07-22 18:11 GMT+02:00 Jon Elson via cctalk : > On 07/22/2018 10:52 AM, Chuck Guzis via cctalk wrote: >> >> On 07/22/2018 06:33 AM, Paul Koning via cctalk wrote: >>> >>> On Jul 21, 2018, at 3:25 PM, Carlo Pisani via cctalk wrote:

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-22 Thread Jon Elson via cctalk
On 07/22/2018 10:52 AM, Chuck Guzis via cctalk wrote: On 07/22/2018 06:33 AM, Paul Koning via cctalk wrote: On Jul 21, 2018, at 3:25 PM, Carlo Pisani via cctalk wrote: ... and what about magnetic-tapes? (e.g. DDS4, DLT, LTO2) which of them lasts for the most? I don't know specifically.

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-22 Thread Chuck Guzis via cctalk
On 07/22/2018 06:33 AM, Paul Koning via cctalk wrote: > > >> On Jul 21, 2018, at 3:25 PM, Carlo Pisani via cctalk >> wrote: >> >> ... >> and what about magnetic-tapes? (e.g. DDS4, DLT, LTO2) >> >> which of them lasts for the most? > > I don't know specifically. I do know that plain old audio

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-22 Thread Paul Koning via cctalk
> On Jul 21, 2018, at 3:25 PM, Carlo Pisani via cctalk > wrote: > > ... > and what about magnetic-tapes? (e.g. DDS4, DLT, LTO2) > > which of them lasts for the most? I don't know specifically. I do know that plain old audio tapes may fail -- I have perhaps 100 cassettes recorded in the

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-22 Thread TeoZ via cctalk
The last generation 5.25" 4.x GB MO drive was unreliable which is why they never went bigger I think. I have a bunch of 5.25" drives from a few makers and all work. -Original Message- From: Carlo Pisani via cctalk Sent: Saturday, July 21, 2018 5:43 PM To: Chuck Guzis ; General

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-21 Thread Chuck Guzis via cctalk
On 07/21/2018 02:43 PM, Carlo Pisani wrote: > thus, MO drive units are not reliable? At least not the later PMC ones. I remember that my drive wasn't even 6 months old when it died. PMC's policy was to replace it with a "refurbished" (read: used) replacement. That one barely lasted a month.

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-21 Thread Carlo Pisani via cctalk
thus, MO drive units are not reliable? 2018-07-21 23:34 GMT+02:00 Chuck Guzis via cctalk : > On 07/21/2018 02:12 PM, TeoZ via cctalk wrote: > >> I have old IBM MO Worm disks that are still readable, same with all my >> MO disks (3.5" 130MB, 5.25" 1.3GB) but drives can be iffy. I would bet >> that

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-21 Thread Chuck Guzis via cctalk
On 07/21/2018 02:12 PM, TeoZ via cctalk wrote: > I have old IBM MO Worm disks that are still readable, same with all my > MO disks (3.5" 130MB, 5.25" 1.3GB) but drives can be iffy. I would bet > that MO media will outlast us all while finding a drive to read them > will be a problem. I've got a

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-21 Thread TeoZ via cctalk
I had a home CDR back when they were over $1000+ new. The media turned out to be very reliable (and I have a bunch with gold, blue, green dye) and it still readable as long as you didn't scratch the optical reflective layer. I also used a laser printed paper cover which probably kept air out. I

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-21 Thread Fred Cisin via cctalk
On Sat, 21 Jul 2018, Carlo Pisani via cctalk wrote: what about MO? (magneto-optic disks) - WORM (write once, read many) - WMRM (write many, read many) and what about magnetic-tapes? (e.g. DDS4, DLT, LTO2) which of them lasts for the most? MO units and disks are a bit costly say >=50 euro for

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-21 Thread Carlo Pisani via cctalk
what about MO? (magneto-optic disks) - WORM (write once, read many) - WMRM (write many, read many) and what about magnetic-tapes? (e.g. DDS4, DLT, LTO2) which of them lasts for the most? MO units and disks are a bit costly say >=50 euro for 4.5Gbyte R/W cartridge and say >=500 euro for the

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-21 Thread Fred Cisin via cctalk
On Sat, 21 Jul 2018, Jim Manley via cctalk wrote: The stability of the dyes is only part of the problem. Even mass-produced read-only optical media (e.g., movie/video content DVDs) can become unreadable over time Hence the necessity of ANYDVD, or equivalent.

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-21 Thread Fred Cisin via cctalk
On Sat, 21 Jul 2018, Al Kossow via cctalk wrote: The edge of the disk is SUPPOSED to be sealed. On cheap media, you see it oozing, and the aluminum oxidizing from the edge inward. This was pointed out to me already in the late 90's. Fortunately, unlike most spinning rust disks, the default is

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-21 Thread Fred Cisin via cctalk
Longevity has always been an issue. (and we already know that 8" floppies outlast 3.5") Does anybody here have experience with "M-Disc"? It is available up to 100GB BDXL! Drives start at less than $100; media is prices vary - the 100GB starts at about $20 each, but the low capacity versions

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-21 Thread Al Kossow via cctalk
On 7/21/18 10:26 AM, Jim Manley via cctalk wrote: > Even mass-produced > read-only optical media (e.g., movie/video content DVDs) can become > unreadable over time because the reflective layer (typically aluminum) > under the data-encoded layer corrodes due to the chemistry of the dyes and >

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-21 Thread Jim Manley via cctalk
The stability of the dyes is only part of the problem. Even mass-produced read-only optical media (e.g., movie/video content DVDs) can become unreadable over time because the reflective layer (typically aluminum) under the data-encoded layer corrodes due to the chemistry of the dyes and encasing

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-21 Thread Chuck Guzis via cctalk
On 07/21/2018 08:14 AM, Carlo Pisani via cctalk wrote: > what is your experience? Generally very good. But then, my valuable stuff on CD-R was done on MAM-A (Mitsui) "gold" media. Some of it is 20+ years old. On the other hand, no CD-RW disk that still have has survived. My experience with

Re: how good is the data reliability with CD ROM and DVD RAM?

2018-07-21 Thread Peter Corlett via cctalk
On Sat, Jul 21, 2018 at 05:14:00PM +0200, Carlo Pisani via cctalk wrote: [...] > They complained their data completely lost after 5 years of storage in CD > ROMs, pointing out that their CDs were perfectly conserved and kept clean > without scratches, but all the data is gone lost since the media

how good is the data reliability with CD ROM and DVD RAM?

2018-07-21 Thread Carlo Pisani via cctalk
hi yesterday I was shocked by a couple of videos on Youtube where guys pointed out their negative experiences with CD ROM and DVD RAM as media for their own backup. They complained their data completely lost after 5 years of storage in CD ROMs, pointing out that their CDs were perfectly conserved