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Lebensdauer SDHC-Karten?

Lifetime SDHC cards?



Frage von Modellbahner:
März 2009

Hello. someone knows what life SDHC cards, if they are only described in the Camera and then archived.
On the net there are enough indications that but only with the number of reading, and Schreibzyclen employ, but do not have the storage capacity.

Gruß Bernd



Antwort von Modellbahner:

My issue has been done. After several phone calls with the company revealed the following picture.

Panasonic = no experience
SanDisk, Kingston and Transcend = approx 10 years

Of course, all this without any guarantee

Bernd



Antwort von nachtspion:

If in any case interesting to know.








Antwort von deti:

We use in the company a lot of SD cards in cameras and embedded systems. Experience shows:

- The failure of a card is not predictable and almost always fatal (ie completely). This is in comparison to hard disks are very uncomfortable. A creeping loss of data was never held before.

- The failure rate is not dependent on manufacturer. We have both trade mark expensive goods as synonymous no-name items. The last card was defaulted of SanDisk.

- It is almost irrelevant how often data is written on the cards. The indication of the guaranteed Schreib-/Lesezyklen are easily überschreitbar. Some cards are far before reaching the maximum number of s.Zyklen.

- The storage of the cards is, at least for 2-3 years no problem - the older we usually do not.

Deti



Antwort von LarsProgressiv:

Hello deti,

here it was, I think, not about the durability of the memory but rather the life of the saved data. Because synonymous with flash cells lose the time, about 10 years after the data.

This should however not be a problem, because you could be the data after a few years simply capture and raufschreiben again. Thus, the period of forward again.

Then, however, is the durability of the entire map once again important. Other hand, after 5 years, then the capacity of available tickets is so high that you loose several old to a new secure could.

Regards
Lars



Antwort von Modellbahner:

It is holding the problem of long-term storage of film, picture, or video material.

Some of my Video 8 films have been problems. Are now saved on HDD. HI 8 films are still in order to small errors. Even secured. DVD's will for long-term archiving is not the synonymous yellow from the egg to be. Hard disks are designed for long-term archiving is synonymous not so good. Chemical Films (short films, etc.) are probably tens of years.
The problem is synonymous Question: What equipment do I play the times from then. IDE hard disks with the neuzigern run no more s.jedem PC. Video 8 and Hi8 barely devices. Narrow films no longer projectors, etc.
The old Ägyter habens known. All-in-stone chisel extends for thousands of years.

What is to be done?

Bernd



Antwort von LarsProgressiv:

Hello Bernd,

what to do?

Because we are a bit easier than the poor Egyptians who can not set in stone just quickly to copy another medium.

We must _nur_ every few years as the medium for our digital data update / change.

Schönes Wochenende
Lars



Antwort von deti:

"LarsProgressiv" wrote:
here it was, I think, not about the durability of the memory but rather the life of the saved data. Because synonymous with flash cells lose the time, about 10 years after the data.


Yep, that's why I wrote that our maps simply broke down and are already in the first 2-3 years. Mir is synonymous aware that the leakage in the flash cells successively stored charge is lost. When, however, a critical degeneration exists, it is difficult to estimate - and probably the Manufacturer can not synonymous with absolute certainty.

Deti



Antwort von weitwinkel:

"Model" wrote:

What is to be done?


a backup to hard drive, the original (Hi8/sd-DVpal / HDV) to tape ... and let the AVCHD HDV m2t as a backup to tape back ...
and photos on DVD-RAM.

Greeting cj



Antwort von Modellbahner:

AVCHD on tape? How does this because the DVD-Ram in the long-term test?

Bernd



Antwort von deti:

So when the broadcasters with the tape archives in two locations made. We are currently per day about 1-2TB together. The stock is then periodically copy new tapes - which then synonymous has the advantage that newer generations of hardware significantly more space per tape allowed. We have 1TB per tape standard, making each of 4 older tapes to a new fit.

For the Normalo home or synonymous for small companies do find a Raid6 system. As many as 2 plates can fail without damaging the data. If we make a DIY computer with Linux on it, then keep the costs very limited. The cost at 10 is a 1TB hard discs (8TB usable), including housing, power supply, motherboard, CPU and memory at around 1200 ¬. The power of such a system should be at approximately 80-100Watt, making approximately 150-200 ¬ electricity costs per year.

Deti



Antwort von weitwinkel:

"AVCHD on tape, how to behave because the DVD-Ram in the long-term test?
Bernd "

AVCHD is unfortunately not directly to tape and needs with little loss
to m2t (HDV) are converted, which for private use but
totally insufficient ... it m2t remains as a copy on a disk,
to see it with the rest of HDV material to be able to process ...
for projects / contracts ect .... must of course with a higher
codec to work (eg with the CanopusHQ) ... but the right space
needs (factor> 10).
gruß cj

ps. DVD-RAM will probably hold a few years ... I hope to at least 10th time ... the photos of my first digiknipse are all on CDs that vermutl. synonymous not much older .. . maybe it's durable BluRay discs?









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