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IBM uses decades-old trick to cram 11TB onto 5TB SSD
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Quote:After [Only registered and activated users can see links Click here to register], it’s IBM turn to disclose that it is working on an enterprise storage solution based on its own proprietary technology. It's called FlashCore Module 2 (or FCM2) and marries some very old concepts (as old as computing itself) with some cutting edge features in an [Only registered and activated users can see links Click here to register].
 
The latter comes in the shape of Everspin's magnetoresistive RAM (MRAM), which provides an inherently non-volatile write cache that is as fast as system memory found in smartphones or computers.
 
The other significant move is the use of 96-layer QLC rather than 64-layer TLC, which might be a step too far for purists who believe QLC doesn’t offer enough endurance/data retention.
 
As for the old-turned-new concept, FCM2 compression is similar to Doublespace in MS-DOS or compression software Stacker (remember that?).
 
Again, here, Big Blue uses technology that comes from its IBM Z mainframe line; line-rate transparent compression allows it to achieve an average compression ratio of about 2.28:1, compared to 2.5:1 for LTO tape and 3:1 for Samsung’s SmartSSD.
 
IBM will deliver FlashCore modules with capacities ranging from 4.8TB to 38.4TB, with rated compressed capacities between 11TB and 88TB. Given that Micron has announced 178-layer NAND with 200+ layers on the horizon, FC modules with capacities beyond 100TB are within the realms of possibility.
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