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NVMe too: DDN stashes Toshiba flash in IME14K burst buffer box

OCZ Z-Drives live on as furiously fast NVMe flash drives

Toshiba has made a 7.68TB version of its dual-port ZD6000 NVMe flash drive available and DDN storage is using the drive in its IME14K burst buffer product.

This complements Apeiron's use of 1.6TB and 3.2TB versions in its NVMe flash array.

Toshiba's announcement mentions that the ZD6000 has increased input/output (I/O) performance compared to prior models. It says that IME14K can scale up to 48 x ZF6000 drives with drive capacities ranging from 800GB to 7.68TB. A drive image reveals the product model number to be ZD635E020 and this is a Toshiba OCZ Z-Drive designation.

There are three OCZ Z-Drive ZD6000 products: ZD6000, ZD6300 and ZD6300 Max Capacity.

The ZD6000 uses 19nm MLC flash whereas the other two use 19nm eMLC NAND. The ZD6000's usable capacities are 800GB, 1.6TB, and 3.2TB (actual: 1024GB, 2048GB, 4096GB). For the ZD6300 the usable capacities are 800GB, 1.6TB, 3.2TB, and 6.4TB (actual: 1024GB, 2048GB, 4096GB, 8192GB), while the numbers for the ZD6300 Max Capacity model are 960GB, 1.92TB, and 3.84TB (actual: 1024GB, 2048GB, 4096GB).


Toshiba's ZD6300 DDN model, with ZD635E020 model number.

The DDN ZD6300 product has a different capacity level – 7.68TB – and this is, we understand, a customised product for DDN.

Tables below provide ZD600, ZD6300 and ZD6300 Max Capacity characteristics. They also show just how complicated SSD drive product characteristics can become as manufacturers tweak over-provisioning and other parameters to optimise drives for market and IEM customer sweet spots.


Toshiba Z-Drive overall characteristics. (AIC is Add-In Card.)


ZD6000 performance data


ZD6300 performance data


ZD6300 Max Capacity performance

We might expect that, over time, 3D NAND will be used to bump up ZD6000 product capacities further, potentially doubling them. ®

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