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Ain't NAND grand? Samsung unveils next-gen SAS SSD

10nm class enterprise drive

Internet Security Threat Report 2014

Samsung has followed its 2012-era SM1625 SDD with the SM1623 model, and promised next-generation SAS SSDs are coming in the near future. What can it mean?

The S1625, using 2Xnm-class NAND (29-20nm cell geometry) topped out at 600GB capacity. The 1623 uses 1Xnm-class geometry (19nm - 10nm) and reaches 800GB capacity. Its performance numbers are slightly better than the 1625, apart from sequential writes, which are worse:

  • Random read IOPS - to 120,000 (SM1625 - 101,000)
  • Random write IOPS - to 26,000 (SM1625 - 23,000)
  • Sequential read bandwidth - to 950MB/sec(SM1625 - 848MB/sec)
  • Sequential write bandwidth - to 520MB/sec(SM1625 - 740MB/sec)

Sammy says its endurance is around one full drive write a day; the thing is optimised for read cycles, clearly. It is classed as an enterprise SSD, by the way, like the previous SM1625.

What does next-generation SAS SSD imply? The SM1623 is a next generation offering, in NAND cell size terms, compared to the SM1625. Are we to expect a sub-1Xnm-class offering?

At the flash memory summit Samsung has been talking about V-NAND SSD with 32 stacked planar layers, promising much higher capacity than planar or 1-layer SSDs. The near future to us implies within the next three months.

The net:net of this to us is that we might be hearing about a high-capacity V-NAND SAS SSD reaching, perhaps, 4TB of capacity. We're all agog. ®

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