HGST polishes Ultrastar SSD whoppers, stuffs with denser Intel flash HGST has refreshed its Ultrastar enterprise SSD line, using denser 20nm NAND to replace the previous 25nm flash, doubling capacity, upping read performance but lowering write performance a tad in the process. The starting point was a three-product Ultrastar SSD800 line-up, maxing out at 800GB and coming in MH (write-intensive …
Because of the costs of SLC you will be seeing more and more eMLC or over provisioned MLC in enterprise environments. Many all flash arrays use one those technologies. IBM and EMC use eMLC in their Flash 840 and XtremIO products respectively, and Pure Storage and SolidFire use MLC.
In general SLC is a bit more expensive, as MLC matures, a lot of the enterprise customers have moved to it, because the CRC on MLC has caught the point of reliability with the SLC. Going forward, TLC will be looking to be deployed (8 bit reference per sector) to take into account further bit density.
At the end of the day, enterprise reliability deals with the complexity and robustness of the CRC code and the quality of the chips.
If you where to run the same on consumer level drives, your $/GB would be way too high.
What are you going on about Nate. That is not laptop form factor, and will not fit in many laptops. It is a 2.5 inch form factor drive, but its around 5mm thick. No different than the 2.5" enterprise spinning rust.
Most larger storage arrays have gone to 2.5" for higher density IOPs in spinning rust, SSDs keep the same format for convenience.
Or do you work for WDC who doesn't have a flash line up yet and is trying to FUD the technology?
I believe the HGST drives are 15mm thick, not 5mm.
If they were 5mm thick they would physically fit the average laptop or notebook just fine.
That's not to say they would actually be usable. There aren't too many laptops or notebooks out there with SAS backplanes.
I cannot be shipped as a laptop drive. Laptops do not support SAS interfaces, and why would they they have no need for a dual connection. Enterprise grade simply means eMLC which is rated for 30,000 program/erase cycles as opposed to 3,000 P/E cycles for standard MLC. Flash is more reliable than HDD although its life can be limited by its P/E rating. Even then, with over provisioning even standard MLC drives can reach 25 Drive Writes per Day and five year warranties.
Based on the comparison picture, it appears that the 800MH.B has a daughterboard (and hence more flash total than the 1600s -- makes sense for the write-intensive application.)
But what's more interesting is that the MM and MR appear to use the same board, indicating perhaps just a firmware change to differentiate between balanced and read-intensive operations.
However, I thought that it had been medically proven that regular reading does not harm your eyesight -- so what accounts for the read-intensive MR being so much blurrier...?
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