SSD vs HDD vs Blu-ray – Was ist der besser langzeit Datenträger (ohne Strom)?
Wie lange hält eigentlich was genau, weil bei Google kriege ich verschiedenste antworten, die höchstens auch nur halb beantwortet werden.
Es heißt z.b. das eine SSD Festplatte mindestends nur 2 Jahre ohne Strom auskommt, bevor die Daten darauf verloren gehen können, da die elektrische Spannung in den Speicherzellen über lange zeit ohne Strom immer schwächer wird.
Da frage ich mich, sind es wirklich nur 2 Jahre und wenn ich doch noch innerhalb 2 Jahre die Festplatte an einen COmputer anschließe, wie ist gegeben, das auch jede Speicherzelle frisch aufgeladen wird, so das sie noch mal wieder einige Jahre auskommen? Z.b. wenn ich auf der Festplatte nur was anschaue oder nur eine kleine Datei speicher, werden die Speicherzellen von den anderen 800GB dann auch frisch aufgeladen, oder nur die Speicherzellen von den Inhalten, die ich jetzt gerade frisch gespeichert habe auf der Festplatte?
- Wecke Festplatte ist auf lange zeit eigentlich am besten geeignet (ohne Strom)
SSDs, HDDs oder eventuell auch Blu-ray Rohlinge?
SSDs speichern ja mit elektrische Ladungen, während HDDs viel mit Magneten machen und Blue-rays sind noch mal eine ganz andere hausnummer, wovon ich nicht sagen kann, ob Blu rays eventuell nicht sogar 50 Jahre halten könnten, da diese ja keine Magnetische oder Elektrische Ladung besitzen mässen, die über Zeit verloren gehen könnte?
- Aber welcher Datenträger kann jetzt genau wie lange deine Daten Speichern, bevor die Gefahr zu groß wird, das die elektrische oder Magnetische Ladung zu schwach wird und die Daten verloren gehen?
(Die Festplatte würden in einer Metall Geldkassette nach dem Backup für viele Jahre aufbewahrt werden.)
(2 votes)
Loading...
BluRays are also not as stable as you thank. The coating weatheres over time. Proper storage is therefore very important to get the maximum lifetime out.
The problem with such a shared backup is that you share the data and, depending on the format used, you lose a part or even everything you lose a disc.
In addition, you will find a BluRay drive only in the museum in 50 years. You already have great problems finding 20 years old components today!
Depending on the model, SSDs hold the data between 0.75 and 2 years without electricity – then bit errors occur.
HDDs, on the other hand, keep the data without current between 5 and 10 years until bit errors occur. Usually more than 7-10 years. Under 7 years, it’s more rare. Therefore, I would say that if you want to archive data in the long term, you can take HDDs and then describe them again every 5 years.
For security, best always 2 HDDs so you have a backup from backup 😉
No, there’s nothing cleared – SSDs have an expiration date. This is just how this technology works. What manufacturers do is give the SSDs the 2-4 times memory space so there is enough reserve memory available to work for a long time.
But you have 2 problems – on the one hand, fade electric charges faster than magentic charges. Charge a phone, turn it off and put it in the closet for 6 months before you turn it on. The battery will no longer be full!
A memory cell is just a microscopically small battery and the same happens with your data. MLC stores 2 bits in a cell – you must be able to distinguish between blank (00), 33% (01), 67% (10) and full (100%). Here a discharge of 10% would still be OK because between 67% and 90% would still be different.
At TLC, there are already 8 and at QLC even 16 grades. 10% discharge would already destroy data here.
In addition, an SSD is a pure software construct. The whole function is based on the fact that software currently holds mapping tables to ensure wearleveling between the individual memory cells. A software error can cause SSD to fail from one second.
HDDs are usually due to mechanical problems. These are announced in advance and therefore, as a user, the SMART values are usually warned months before a failure. This also speaks for HDDs!
How come you can still buy today on Amazon and Ebay, 1.44MB Floppy Discs and USB Floppy Discs readers, though they have been available for 54 years?
And what about SLC? (1bit)?
Single layer cell.
They are also in use for certain applications.
After today most computers are sold without DVD / BluRay drive and there are no industrial applications that need them (at least not as far as I know) I assume that these stores disappear faster than diskettes.
However, it doesn’t matter – securing data on BluRay is extremely time-consuming and the BluRays themselves won’t last 50 years.
I keep getting old backups on CD or DVD that can’t be read in the closet after 10 or 12 years… BluRays won’t be really better!
Apart from that, you would have to burn everything again every few years and then try everything again because even when burning, something can go wrong. This would therefore also be technically the most expensive and thus the most error-prone method.
Have fun looking… I wouldn’t trust TeamGroup Dingern without seeing the chips myself.
https://www.idealo.de/preisvergleich/ProductCategory/14613F994144.html
It simply no longer builds SLC except for special applications and they are absurdly expensive. You can still find MLC at Samsung and the rest has TLC and QLC.
New generations of chips with 5 bits/cell are already in the start holes…
But I would also estimate the longevity of the data without power supply as lower than that of an HDD.
In addition, SSDs can fail without warning and data recovery can only be done in some cases. So I’d be pers. SSD my important data never entrust as long as you get HDDs to buy!
Jein – SLC is the most sturdy yet your data is chopped and encrypted to reach Wearleveling and the best possible distribution of the loads.
All of this is held together only by mapping tables and a software bug is sufficient to complete the collapse.
Therefore, I think SSDs are much more problematic than HDDs – in HDDs, problems with the help of the SMART values in at least. 95% of cases. So you have time to react. It’s not like the SSD.
What is now with single layer cells?
Are they the safest?
Undnw7e would cut what if I wanted to compare an HDD with an SLC SSD related to the longevity of the data?
The magnetic tape is even better for long-term archiving. This has the best value for money. Even in today’s time, the magnetic tape has still not been used out. This results in a storage density of up to 314 GBit per square inch.
So-called tape libraries are used. There are countless cartridges on a shelf that are then transported from a robot to the drives. The Cardridges are also equipped with a barcode. In addition, the tape library has an internal database. In this is stored which file is located on wecher Cardrige. There is also a Feher correction system. If the number of errors of a cardridge exceeds a certain value, the content of the cardridge is copied to a new blank and the old one is ejected.
for data backup/backup/archiving use here ne HDD
SSDs have only a certain number of write operations per cell and they also lose the data with time when they are not connected to the current in time
BR is the last joke, because it is not rewritable and also much more expensive in terms of TB
and if you really want to run LANGzeit-DaSi, you don’t come past bands (e.g. LTO-9, drives e.g. from Tandberg)
But what are the exact numbers now from SSD, HDD and what could Blu-ray offer?
There should also be Blu-rays with several semi-transparent layers that can be more than 25GB, prestige I get about 1 blank for 1€ (10 blanks for 10€)
And this story with the writing process, this problem is not solved by using every memory cell as much as it is stored 1bit per memory cell instead of 2bit, 4bit or 8 bit?
(My M.2 SSD in my computer is supposed to hold 2 mio hours, which corresponds to over 200 years, but this is permanently installed in the PC and is in use…)
Life of Archiving Media – Storage Systems, Archiving Duration, Organisation: Ratgeber Long-term Archiving: File formats and storage media – TecChannel Workshop
Yes, if you want to entrust your data to burnt blanks, just do. I would prefer HDDs, but everyone must know
AHSO… What’s the deal with SSD’s spelling? SSDs have a so-called TBW, which is “guaranteed” by the manufacturer during the warranty period. Thus, your statement is due “as long as it has been clarified”.
From the past five years, I only take the down rate from the HDD and SSD we have built up: SSD is loose at 25-30%, whereas HDD with good will is well below 1%