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[TH] IBM Files Flexible Capacity SSD Patent - Page 2

post #11 of 23
Quote:
Originally Posted by Cronos007 View Post
While you may feel it is an obvious idea, it is one that hasn't been put into practice. Also selling 2 drives is not a solution. Assuming for example you want data integrity and reliability, 2 drives in a raid 1 will still wear out equally as fast as a single drive. And will need replacing. A single IBM drive with this Flex Tech, will essentially have a 2nd completely unused drive within it, and will swap over the contents of a dying cell to a fresh one, automatically. Saving your data and prolonging the life of the drive.

I think you misunderstood me. All flash drives have some amount of unused space, it's used as both a swap file, and also so that as cells die, there are spares to replace them. All this does is allow you to adjust how much of the drive is reserved. It's not a terrible idea, but it's pretty obvious. My "just sell 2 drives" comment was intended to suggest that they simply sell a consumer and an enterprise version, with the enterprise version having a huge amount of reserved space compared to the consumer one.
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post #12 of 23
Quote:
The basic idea is that users can either choose to leverage the full capacity of the SSD or reduce the size and reserve some of the memory cells as a safety net when other memory cells fail
So they just patented the concept of a partition... seriously?
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post #13 of 23
I don't think this is worthy of a patent... they are just making something that makes some sense in some scenarios - in a year or two, when flash drives become big and cheap enough, you may want to use one as a storage medium (imagine a Media Center with one would be even more silent). If in that case you are writing once or twice at most and reading back a lot more, it makes sense to reserve less space for error correction, as the drive will not need as much, and the user will benefit from having more storage.

This approach could also be applied on mechanical HDD's, but there is a good reason for not doing it. Mechanical HDD's also have a spare area to reallocate bad sectors, but because sectors that, let's say, 'reach the end of their lives', cannot be read as opposed to a flash drive, this scenario does not make sense for a traditional HDD, but it makes perfect sense for an SSD.

But that is not to say the idea is new. It just didn't make sense to use it until now.
 
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post #14 of 23
Quote:
Originally Posted by xlink View Post
about the same as the cost of a firmware swap.

Intel, sandforce, jmicron, indilinx, etc. have been doing this for a while just without the consumer choice and automation and instead opted for a once size fits all approach(my 80GB drive has around 8% capacity in reserve thus limiting me to an effective 74.4GB)
no thats called your file system taking space for the tables..
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post #15 of 23
There's patents in everything this days.


Jesus, the money.
   
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post #16 of 23
I'm guessing the consumer (cough enterprise) can only increase redundancy instead of being able to tune in both directions, how else would IBM handle all the warranty claims.

Should this feature be patented? no
    
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post #17 of 23
Guys, IBM patent includes dynamic reallocation of overprovisioning. No SSD does that currently.



Quote:
Originally Posted by Markeh View Post
As an owner of an IBM hard drive, its understandable that it will fail at some point anyway (technically it will but that's regardless). I've got 2 of them, one from a ThinkPad with an abundance of bad sectors and a 45GB (yes, 45GB) that refuses to recognise in the BIOS half the time
IBM sold their HDD division in 2003. That's a 8 year old hard drive... so of course it will fail.

Quote:
Originally Posted by Shadowrunner340 View Post
What's needed is a technology with the advantages of SSDs, but without the write limit, or whatever it is.
No, the write limit is a fundamental limitation of NAND. However, the write limit will not impact everyday usage. With ECC, users will not be impacted by this limit. The SSD are rated for 5+ years with normal daily usage.
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post #18 of 23
Quote:
Originally Posted by MrPrime View Post
no thats called your file system taking space for the tables..
It's also called "coprorations ripping consumers off", because they love to use "decimal bytes", rather than the real deal.

Although it might be a good idea to have flexibility - I think it ends up being a mute point because mass storage is so inexpensive, and because SSDs are not very good for heavy server use where the data changes rapidly, and where established HDD technology is still faster than the network that connects to it.

One would have to look at the overhead any driver that IBM creates would need, because it might end up that if their driver is bloated, traditional RAID may end up being faster and entirely efficient for the purpose.
post #19 of 23
I was under the impression that a lot of these controllers would use unformatted space in a similar manner as IBM has proposed.

Err, I might be thinking of using the unformatted space solely for wear leveling, or to avoid write amplification.

Quote:
Originally Posted by xlink View Post
about the same as the cost of a firmware swap.

Intel, sandforce, jmicron, indilinx, etc. have been doing this for a while just without the consumer choice and automation and instead opted for a once size fits all approach(my 80GB drive has around 8% capacity in reserve thus limiting me to an effective 74.4GB)
No, your 80GB drive has additional memory beyond the 80GB. You see 74.4 within your OS because of the transition from gigabytes to gibibytes (which will normally consume ~5% of the volume).
Edited by RonindeBeatrice - 5/3/11 at 6:07am
    
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post #20 of 23
Thread Starter 
While it is true that SSDs will continue to read after the cells reach their write limit this allows SSDs to be used in mission critical apps where data has to be able to be written.
Also being that this will be handled at the hardware level it should not significantly affect access speeds.
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