Samsung has released the SSD 845DC PRO, an enterprise-class SSD that comes in two different capacities and utilises the company's 24-layer 3D V-NAND.
The SSD 845DC PRO utilises 3D V-NAND and over-provisioning to enhance endurance and steady state performance
The new SSD was officially unveiled at this years Samsung SSD Global Summit in Seoul, alongside the company's newest consumer drive, the SSD 850 PRO. The SSD 845DC PRO joins the SSD 845DC EVO, which was launched just over a month ago, as Samsung's second retail branded enterprise drive – we're used to only seeing enterprise drives from Samsung in the OEM arena.
The two 845DC drives are named as such because Samsung categorises them as 'data centre' SSDs – they are mainly designed to handle the hefty storage needs of enterprise users in the content delivery, server and media workstation spaces.
The bedrock of the SSD 845DC PRO is Samsung's first-generation 2-bit MLC 24-layer 3D V-NAND. As you may know from our review of the SSD 850 PRO
, which uses second-generation 32-layer 3D V-NAND, this type of flash increases speed and endurance while also lowering power consumption compared to traditional planar NAND solutions. As such, the SSD 845DC PRO is designed for mixed and write intensive workloads (e.g. media workstation, app and database servers), while the SSD 845DC EVO, which uses 3-bit MLC planar NAND and is more susceptible to degradation, is designed for read intensive workloads (e.g. content delivery networks and web servers).
The SSD 845DC PRO will be available in 800GB and 400GB capacities, so Samsung is using a massive 27 percent over-provision on its drives to further enhance endurance and sustained performance, which is crucial for write heavy applications. The DRAM cache is 1GB in the bigger model and 512MB in the 400GB one, and the controller is Samsung's MDX model (the same as in the SSD 840 PRO). The drive itself fits the 7mm high 2.5-inch form factor and operates via a SATA 6Gbps interface.
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Other enterprise-class features include end-to-end data protection, power loss protection thanks to tantalum capacitors, and Dynamic Thermal Guard. We've seen the latter feature in Samsung's client SSDs before, but it's a lot more relevant in the enterprise space, where operating temperatures can be much higher.
Sequential read and write speeds are quoted as 530MB/sec and 460MB/sec respectively for both drives. More importantly, Samsung says that steady state 4KB random read performance is around 92,000 IOPS while steady state 4KB random write performance is 50,000 IOPS for the 400GB and 51,000 IOPS for the 800GB.
As with the SSD 845DC EVO, the warranty on the SSD 845DC PRO is five years, though total bytes written (TBW) that this covers is far greater on the PRO drive. The EVO drives are covered for just 0.35 drive writes per day (DWPD) for the five year period, but the PRO drives are both certified for 10 DWPD, meaning that you can write 7.3PB to the 400GB and 14.6PB to the 800GB before the warranty is invalidated, which again highlights Samsung's focus on write heavy workflows.
Availability of the SSD 845DC PRO drives is slated for July. Pricing is as yet unknown, but when quizzed in Seoul a Samsung representative estimated that they would retail for between $1.50 and $2 per GB.