Sandisk unveils 1 Terabyte SD card

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Sandisk unveils 1 Terabyte SD card

Postby Iroscato » 2016-09-22 06:41pm

http://www.techradar.com/news/computing ... e-comments

No article quote as I'm on my phone.

This is awesome - I remember 10 years ago or so a 1GB SD card was still a pretty big deal. Now we have one being released with a thousand times that capacity - shit, if they release a 1.5 TB in a couple years it'll have a million times the capacity of those weird floppy disk things old people used to use :P
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Re: Sandisk unveils 1 Terabyte SD card

Postby Elheru Aran » 2016-09-22 07:02pm

So, remind me. What exactly is stopping people from just using a pile of these as hard disk replacements for PC's or laptops?

(not a nerd, small words please :P)
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Re: Sandisk unveils 1 Terabyte SD card

Postby Terralthra » 2016-09-22 07:06pm

They're more expensive (significantly) and slower in terms of read/write speed (by an order of magnitude). Also more fragile, and more susceptible to corruption and damage.

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Re: Sandisk unveils 1 Terabyte SD card

Postby Elheru Aran » 2016-09-22 07:08pm

Ahh. So, why are they used in cameras, phones and mobile devices, then? Simply the lightness/portability?
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Re: Sandisk unveils 1 Terabyte SD card

Postby Terralthra » 2016-09-22 07:13pm

Elheru Aran wrote:Ahh. So, why are they used in cameras, phones and mobile devices, then? Simply the lightness/portability?

Correct. They trade durability, cost, and overall larger storage capacity for mass and size.

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Re: Sandisk unveils 1 Terabyte SD card

Postby Elheru Aran » 2016-09-22 07:22pm

I assume the same issues are present with flash drives? Or is that a different type of memory storage?
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Re: Sandisk unveils 1 Terabyte SD card

Postby Terralthra » 2016-09-22 07:24pm

Elheru Aran wrote:I assume the same issues are present with flash drives? Or is that a different type of memory storage?

It's all a matter of engineering trade-offs. SSDs are faster, and more expensive, but perhaps a bit more prone to failure in the long-term than HDDs (spinny disk drives). Most mass market drives are tuned to optimize one-two things at the expense of one-two others.

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Re: Sandisk unveils 1 Terabyte SD card

Postby Elheru Aran » 2016-09-22 07:27pm

Excellent. Very informative, thank you.
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Re: Sandisk unveils 1 Terabyte SD card

Postby General Zod » 2016-09-22 07:31pm

Terralthra wrote:
Elheru Aran wrote:I assume the same issues are present with flash drives? Or is that a different type of memory storage?

It's all a matter of engineering trade-offs. SSDs are faster, and more expensive, but perhaps a bit more prone to failure in the long-term than HDDs (spinny disk drives). Most mass market drives are tuned to optimize one-two things at the expense of one-two others.


I dunno if the modern SSD is more prone to failure when the HDD will literally break if you drop it. SSDs can survive a couple of falls without compromising any of your data and the cost is really coming down.
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Re: Sandisk unveils 1 Terabyte SD card

Postby Elheru Aran » 2016-09-22 07:33pm

General Zod wrote:
Terralthra wrote:
Elheru Aran wrote:I assume the same issues are present with flash drives? Or is that a different type of memory storage?

It's all a matter of engineering trade-offs. SSDs are faster, and more expensive, but perhaps a bit more prone to failure in the long-term than HDDs (spinny disk drives). Most mass market drives are tuned to optimize one-two things at the expense of one-two others.


I dunno if the modern SSD is more prone to failure when the HDD will literally break if you drop it. SSDs can survive a couple of falls without compromising any of your data and the cost is really coming down.


I suspect he's talking about *data* failure, not *physical* failure.
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Re: Sandisk unveils 1 Terabyte SD card

Postby General Zod » 2016-09-22 07:34pm

Elheru Aran wrote:
General Zod wrote:
Terralthra wrote:It's all a matter of engineering trade-offs. SSDs are faster, and more expensive, but perhaps a bit more prone to failure in the long-term than HDDs (spinny disk drives). Most mass market drives are tuned to optimize one-two things at the expense of one-two others.


I dunno if the modern SSD is more prone to failure when the HDD will literally break if you drop it. SSDs can survive a couple of falls without compromising any of your data and the cost is really coming down.


I suspect he's talking about *data* failure, not *physical* failure.


It's pretty much a non issue for a modern SSD.
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Re: Sandisk unveils 1 Terabyte SD card

Postby Elheru Aran » 2016-09-22 07:36pm

General Zod wrote:
Elheru Aran wrote:
General Zod wrote:
I dunno if the modern SSD is more prone to failure when the HDD will literally break if you drop it. SSDs can survive a couple of falls without compromising any of your data and the cost is really coming down.


I suspect he's talking about *data* failure, not *physical* failure.


It's pretty much a non issue for a modern SSD.


I suppose they haven't been around long enough to do an endurance test like say putting identical amounts of data on a HD and a SSD and waiting a couple of years, then seeing what degradation has occurred?

Are there any computers out there that use SSD type memory? (like I said, I don't keep up with this kind of thing)
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Re: Sandisk unveils 1 Terabyte SD card

Postby General Zod » 2016-09-22 07:42pm

Elheru Aran wrote:I suppose they haven't been around long enough to do an endurance test like say putting identical amounts of data on a HD and a SSD and waiting a couple of years, then seeing what degradation has occurred?

Are there any computers out there that use SSD type memory? (like I said, I don't keep up with this kind of thing)


I don't know what you mean by SSD type memory. Are you talking about ram or just hard drives? Because my laptop is running with a 256gb ssd hard drive.
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Re: Sandisk unveils 1 Terabyte SD card

Postby Terralthra » 2016-09-22 07:48pm

SSDs have more drop resistance than modern HDDs, yes. However, their typical-use lifetime is still lower, though not by much. It's arguable whether or not it matters for typical use, since the typical user replaces a hard drive with a new computer well before the median time to failure of either.

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Re: Sandisk unveils 1 Terabyte SD card

Postby Elheru Aran » 2016-09-22 07:49pm

General Zod wrote:
Elheru Aran wrote:I suppose they haven't been around long enough to do an endurance test like say putting identical amounts of data on a HD and a SSD and waiting a couple of years, then seeing what degradation has occurred?

Are there any computers out there that use SSD type memory? (like I said, I don't keep up with this kind of thing)


I don't know what you mean by SSD type memory. Are you talking about ram or just hard drives? Because my laptop is running with a 256gb ssd hard drive.


Well that pretty much answered my question right there. I guess I meant hard drives... 'flash drive' type memory which doesn't physically move, versus the old-school spinny-disk type hard drives.

Though that does make me think of something; should your computer get fried, it might be harder to recover memory off SSD type units, while HDD disks could be pulled and run. Is that right?
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Re: Sandisk unveils 1 Terabyte SD card

Postby Terralthra » 2016-09-22 08:00pm

That depends on what you mean by "fried". If you mean ESD or a power surge of some sort, anything that's bad enough to damage an SSD is liable to also damage the controller PCB on an HDD as well.

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Re: Sandisk unveils 1 Terabyte SD card

Postby Elheru Aran » 2016-09-22 08:02pm

Terralthra wrote:That depends on what you mean by "fried". If you mean ESD or a power surge of some sort, anything that's bad enough to damage an SSD is liable to also damage the controller PCB on an HDD as well.


Essentially by 'fried' I mean 'extensively damaged' as in 'unusable but data possibly recoverable'. I don't mean like 'set off thermite on case' or 'lightning strike explodes monitor' (not that *that* should happen, usually...).

Like if some lout decides to drop your laptop out of a third-story window onto a concrete sidewalk. Something like that.
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Re: Sandisk unveils 1 Terabyte SD card

Postby General Zod » 2016-09-22 08:09pm

SSD units aren't integrated into the motherboards. You can take them out and upgrade them just like regular hard drives.
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Re: Sandisk unveils 1 Terabyte SD card

Postby Sea Skimmer » 2016-09-23 09:29pm

General Zod wrote:I dunno if the modern SSD is more prone to failure when the HDD will literally break if you drop it. SSDs can survive a couple of falls without compromising any of your data and the cost is really coming down.



Yeah the drive is mor edurable against impact damage. However the individual memory cells begin to die at an early point, and keep dying. Eventually this will corrupt the drive, and long before a comparable rotary drive would die like that. Reformatting from time to time can extend SSD lifespans though, on reformat the drive will ignore all the bad cells for good.

SDD lifespans have vastly improved over what they were four or five years ago though. It's no longer a major practical consideration, if you get a high quality one, and if you aren't using it for a server. The best warrenties are now for 10 years for 40 Gigs read/write per day the entire time. Though keep in mind lesser usage may not extend the lifespan by much because of the ways the cell breakdowns occur are not entirely dependent on use.
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Re: Sandisk unveils 1 Terabyte SD card

Postby General Zod » 2016-09-23 09:43pm

I've had mechanical drives fail well under the ten year mark. So I'm not too worried about SSDs failing before then.
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Re: Sandisk unveils 1 Terabyte SD card

Postby Imperial528 » 2016-09-23 11:59pm

Elheru Aran wrote:Though that does make me think of something; should your computer get fried, it might be harder to recover memory off SSD type units, while HDD disks could be pulled and run. Is that right?


The only advantage I can think of for HDDs in terms of memory recovery is that, should all else fail, you can get the platters removed and analyzed. Of course there are techniques to reconstructing damaged or unreadable flash memory, but they're rather more expensive than the equivalent services for HDD platters.

That said, at that point you're looking into hiring expensive services who will be working on your data storage in a clean-room laboratory regardless of if it was an HDD or SSD before it got fucked up.

I suppose if you had a lot of money to throw at it or if the data was particularly valuable some recovery can be possible so long as the platter isn't completely ruined (i.e. damage doesn't quite cover all of it). But that's just a guess based on a few stories from my dad, where people he's worked with have lost or nearly lost security clearance because they didn't ensure that they belt-sanded the platters of disposal-marked HDDs before sending them to be sent to a chipper, though the company he works for has since switched to a chipper located on-site capable of accepting entire drives and reducing them to a coarse dust instead of having to send them elsewhere for disposal; now they just send the resulting dust and fragments to the disposal center, thus eliminating the risk of someone making off with the platters or the drive's memory buffer. Last I heard they still use the belt sander for CDs though.


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