[techradar]Incredible vinyl-like super SSDs could make hard disk drives obsolete - Page 3 - Overclock.net - An Overclocking Community

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[techradar]Incredible vinyl-like super SSDs could make hard disk drives obsolete

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post #21 of 24 (permalink) Old 07-24-2020, 08:42 AM
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Quote: Originally Posted by ozlay View Post
Until it dies and takes a week to rebuild.
Rebuilding only takes about 22 hours. I rarely have to worry about it since I use a hot spare. We replace our HDDs at the 4.5 year mark even though we could get an extra 1.5 years out of most of them.

I still don't see how your point makes HDDs unpractical especially with the expensive pricing of SSDs.

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post #22 of 24 (permalink) Old 07-24-2020, 02:50 PM
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Quote: Originally Posted by ozlay View Post
Until it dies and takes a week to rebuild.

I have 2 16TB drives and 1 10TB drive in a Btrfs storage pool. The 10 TB drive was added recently and the drives have been balancing since last Saturday and it still has 48% left.


Code:
Balance on '/home' is running
14805 out of about 28405 chunks balanced (14806 considered),  48% left
Dumping filters: flags 0x7, state 0x1, force is off
  DATA (flags 0x0): balancing
  METADATA (flags 0x0): balancing
   SYSTEM (flags 0x0): balancing

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post #23 of 24 (permalink) Old 07-25-2020, 05:52 AM
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Quote: Originally Posted by Master Chicken View Post
That's what you need, QLC in your data center. Why didn't I think of sacrificing reliability for density in my data center?

Companies that work on a scale that warrants them to buy out giant rooms in data centers don't care all that much about reliability so long as the storage is large and cheap and QLC provides that. Besides there are so many redundancies that drives failing every day isn't a problem they'll just have a tech go in and hots swap all of the failures.

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post #24 of 24 (permalink) Old 07-25-2020, 07:26 AM
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also for WORM (write once read many) type use cases where 99.99+% of the operations are reads rather than writes, write durability just doesn't matter. netflix might stream a show a thousand times off an SSD before replacing the file for instance.


Quote: Originally Posted by Zver1 View Post
Hard to do wafer scale. At high densities, wafer defects are more common. One of the advantages AMD has over Intel is that chiplets are smaller than whole die CPUs. Essentially chiplets mean get to cut out defect areas of the wafer and still get plenty of useful chiplets. The odds of getting a defect free chip diminish rapidly as the area of the chip increases. This is also the reason Samsung makes great OLED phone screens but could not make a cost effective large screen OLED TV with the same technology.
they don't assume the entire wafer is functional. redundancy is baked into the design and faulty portions can be lasered off. cerebras discussed this challenge when revealing their wafer-scale ai chip: https://www.servethehome.com/cerebra...-largest-ever/

Quote: Originally Posted by TheBadBull View Post
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