OCZ Z-Drive R4 CloudServ (RM1616) Features Sixteen SandForce Controllers

The Z-Drive R4 is a PCIe SSD available in 4 and 8-controller versions targeted squarely at the enterprise. Apparently some of OCZ's customers wanted an even beefier version, which OCZ has delivered in the form of the Z-Drive R4 CloudServ (RM1616). Featuring sixteen SandForce SF-2582 controllers, the RM1616 supports up to 16TB of NAND on a single, double slot, PCIe card. The interface remains PCIe x8 although the connector is physically a x16 interface.

The RM1616 is organized into two 8-controller sets, each behind an OCZ VCA chip. 

Gallery: OCZ Z-Drive R4 CloudServ (RM1616) Features Sixteen SandForce Controllers

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OCZ Z-Drive R4 CM88 (1.6TB PCIe SSD) Review

In our last SandForce SSD roundup I talked about how undesirable the consumer SSD market is, at least for those companies who don't produce their own controllers and/or NAND. There's a downward trend in NAND and SSD pricing, which unfortunately squeezes drive manufacturers as they compete for marketshare. The shrinking margins in the consumer SSD space will ultimately drive companies out of the business, consolidating power in those companies who are fine operating with slim margins. There are other effects, such as insufficient validation testing that result from this price crunch.

Public companies are under an even greater pressure to maintain high profit margins. Investors don't care about good product, they care about good returns. What is a public SSD manufacturer like OCZ to do? Go after the enterprise market of course.

OCZ has quietly addressed the enterprise SSD space for a while now. Today you can custom order an OCZ Deneva 2 SSD which is an enterprise focused SF-2000 based solution. OCZ's enterprise drives are fully customizable down to the controller, firmware and NAND type on-board. If you want an SF-2000 drive with SAS support and SLC NAND, OCZ will build it for you.

In the enterprise segment where 1U and 2U servers are common, PCI Express SSDs are very attractive. You may not always have a ton of 2.5" drive bays but there's usually at least one high-bandwidth PCIe slot unused. The RevoDrive family of PCIe SSDs were targeted at the high-end desktop or workstation market, but for an enterprise-specific solution OCZ has its Z-Drive line.

Read on for our review of OCZ's Z-Drive R4.

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Computex 2011: OCZ Z-Drive R4 88, Eight SF-2281 Controllers in RAID-0

OCZ's consumer accessible PCIe SSD line is the RevoDrive, but if you're an enterprise customer and want a custom configuration OCZ will build you a Z-Drive. To show you how far OCZ is willing to go, it announced a brand new Z-Drive at Computex: the R4 88.

Take eight SF-2281 controllers, put them all in a RAID-0 on a PCIe x8 card with an as-of-yet unknown controller and you've got the Z-Drive R4 88:

OCZ will be offering two types: the C Series and the R Series. The C Series has less over provisioning and lacks any polymer capacitors for power loss protection, while the R Series has more NAND set aside as spare area and comes equipped with some form of protection against sudden power loss.

OCZ had a 3U Colfax server with multiple Z-Drive R4 88s running an Iometer 4KB random read test, the end result was a single server that delivered more than 1 million IOPS. The drive is spec'd for up to 2.9GB/s reads and 2.7GB/s writes. Obviously as an 8-way RAID-0 there are reliability concerns and I'm not exactly sure the type of enterprise customer that would deploy such a thing, but it's a neat drive to look at nonetheless.

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