Fujifilm Created a Magnetic Tape That Can Store 580 Terabytes • Hacker News Board

Re: Fujifilm Created a Magnetic Tape That Can Store 580 Terabytes

#331

Post by ece » Thu, Dec 31, 2020, 4:14 AM UTC

paulmd wrote: post #277

ddingus wrote: post #231

Earlier quoted context omitted.

Absolutely. I had no idea tape was being pushed to these levels! Crazy good tech accomplishment right there. In a way, I am somehow comforted. Tape remaining relevant kind of dropped off my radar. Good to see. 317Gb / square inch AND 15km/h transport speed? That is nuts fast. Wonder how robust it really is? Of course at those densities and potential transfer rates there is ample room for error recovery.

It has never really entered the public consciousness since it's not a consumer-facing technology but tape development has continued apace. LTO-9 should be hitting the market very soon and supports up to 45TB per tape (compressed capacity, 18TB raw). Not quite sure where IBM's numbers here come from, their previous numbers don't match up to the progression of the LTO tape series' capacity. Maybe they are citing "resea…

Amazon Glacier is tape-based, so anyone certainly can get access to tape for backup purposes.

Re: Fujifilm Created a Magnetic Tape That Can Store 580 Terabytes

#332

Post by Tepix » Thu, Dec 31, 2020, 10:02 AM UTC

sedatk wrote: post #177

nichch wrote: post #158

Earlier quoted context omitted.

Is there a source regarding M-DISC being unable to hold up to their lifetime promise? A quick google search brings up amateur-ish blog posts, and even those co sign the medium.

Yes, French national metrology and testing laboratory LNE: https://www.lne.fr/sites/default/files/inline-files/syylex-g...

I'm not convinced. I'm no expert on aging simulation however. But heating a DVD to 90°C seems like it would do different things to the disc than normal aging at recommended temperatures, wouldn't it?

Re: Fujifilm Created a Magnetic Tape That Can Store 580 Terabytes

#333

Post by Karunamon » Thu, Dec 31, 2020, 6:35 PM UTC

seg_lol wrote: post #237

Karunamon wrote: post #217

Earlier quoted context omitted.

It's not a fair comparison to put up hard drives (integrated mechanics) against tape drives (seprated mechanics). They do not solve the same problem and have different longevity profiles. If I'm spending $500 on tape storage, it's because I want something that will last a long time, something that portable hard drives tend to have issues with. LTO5 onward supports LTFS, which exposes the tape to the OS as if it were…

LTFS is ok, a multilevel tar file with a file list followed by an FEC encoded block store would be easier and more portable. It has been 8+ years since I played with LTFS, so maybe it has improved.

LTFS as of today is supported in FUSE, which realistically means it works on every OS that matters.

Re: Fujifilm Created a Magnetic Tape That Can Store 580 Terabytes

#334

Post by Karunamon » Thu, Dec 31, 2020, 7:04 PM UTC

webmobdev wrote: post #326

Karunamon wrote: post #198

Earlier quoted context omitted.

If you're doing archival storage, does the write speed really matter? If you have enough volume of incoming data where the write speed does matter, you've already eliminated most archival storage methods anyways.

True. But slow transfer speed is still a negative when we are comparing it to other archival methods (in this case, the tape drives). And that is why the demand for tape drives for consumers.

I'm having a very difficult time understanding why they are a negative at all for most use cases. It's not like running a backup monopolizes the machine you're running it on.

Again, tapes are for archival storage. Not nearline, not live, archival. As in, you write the data and likely don't come back to it for months to years.

Re: Fujifilm Created a Magnetic Tape That Can Store 580 Terabytes

#335

Post by samstave » Thu, Dec 31, 2020, 11:07 PM UTC

Dylan16807 wrote: post #323

samstave wrote: post #318

Earlier quoted context omitted.

Archival... Imagine saving BILLIONS of [data points](face,interactions,vids,text,etc) per person on hot or warm? NOPE Life history will be on tape in the archives of such...

Except for videos, that doesn't take up a lot of space. The oppressive part is tracking everywhere you go and everything you say, which fits easily into warm storage. For example, storing your position every 20 seconds might take 10KB a day. You'll collect 15 million data points in a decade, but each one is only a few bytes.

the problem I see, some entitity will dev an algo that will extrapolate between frames using corrolated data from even yet other users' info

so you subject-A at frame 0 then you have suject-A at frame 100

but no data from subject-A between - but you have data from subjects-b-------------j and can track subject-A in such....

extrap, and you have the "zoom and enhance" of surv....