Packaging / Specifications
Packaging

The DDRdrive comes extremely well packaged in a case that I’m convinced could withstand a fall from a very tall building, or being run over by a truck, or perhaps even a nuclear holocaust.  The case seals so well that it has an air bleeder valve to equalize pressure prior to opening.  Included is a driver CD and an AC adapter to supply the X1 with power when the primary system is powered down.


DDRdrive hits the ground running - PCI-E RAM-based SSD - Storage  1

Bomb-proof packaging, anyone?  Yes, we got two of them.

The DDRdrive concept is currently focusing on IOPS over throughput.  Parallelism is meant to be achieved by using multiple X1’s in a single system.  While future products may support PCI-E 2.0 and a greater number of lanes, their first publicly available product will stick with PCI-E 1x.

Specifications

Product:
  • The DDRdrive X1’s breakthrough architecture integrates both DRAM and NAND to redefine solid-state storage. Singularly designed to  target IOPS intensive applications while setting a new standard in performance, power, and price. The DDRdrive X1 is “The drive for speed.”
Innovation:
The DDRdrive X1’s solid-state storage system features:
  • DRAM / NAND Synthesis – A one-to-one correspondence between solid-state storage capacities. Combines the proven speed, reliability, and longevity of DRAM with the non-volatility of NAND. Removes the necessity and performance penalty of a NAND wear leveling implementation. Resolves the intractable random write limitations of a NAND only device with DRAM’s unsurpassed IOPS potential.
  • High Performance IOPS Engine – An FPGA based solid-state storage accelerator, in-the-field upgradable and purpose-built to dominate IO operations. Achieves extremely low latency and exceptional IOPS execution.
  • Custom Device Driver – Avoids unneeded and archaic protocol translation with a direct-to-hardware storage stack. Bypasses conventional device driver complexity and inefficiency with extensive end-to-end IOPS optimization.
  • HBA / Storage Unification – Negates needless data transfers between otherwise physically separate devices, improving data integrity and increasing IOPS performance.
Performance:
  • Random 512B Reads up to:300,000+ IOPS
  • Random 512B Writes up to : 200,000+ IOPS
  • Random 4KB Reads up to: 50,000+ IOPS
  • Random 4KB Writes up to: 35,000+ IOPS
  • Sustained Sequential Reads up to: 215+ MB/s
  • Sustained Sequential Writes up to: 155+ MB/s
Device Driver Support:
  • Microsoft Windows 2000 Client/Server
  • Microsoft Windows XP (32/64 bit)
  • Microsoft Windows Vista (32/64 bit)
  • Microsoft Windows 7 Beta (32/64 bit)
  • Microsoft Windows Server 2003 (32/64 bit)
  • Microsoft Windows Server 2008 (32/64 bit)
  • Microsoft Windows Server 2008 R2 Beta
  • Linux support is expected at a future date
Hardware Requirements:
  • PCI Express v1.0a, v1.1, or v2.0 X1/X4/X8/X16 Slot *
* Double-wide slot clearance required.
PCI Express Full-Height Half-Length Form Factor

 Capacity:
  • Primary Storage Capacity: 4GB DRAM
  • Secondary Backup Capacity: 4GB SLC NAND
* Available Raw Storage – 4,160,749,568 bytes
Unavailable Redundant Storage – 134,217,728 bytes

Backup/Restore:
  • Complete Drive Backup: DRAM to NAND in 60 Seconds.
  • Complete Drive Restore: NAND to DRAM in 60 Seconds.
  • Lifetime Number of Drive Backups: 100,000+
 Editors notes on the specs
  • The ‘Redundant Storage’ above is due to conservative reservation of a portion of flash blocks.  Since the DDRdrive employs high grade SLC flash, and performs only sequential writes to it, the flash will likely outlive it’s rated 100k write cycles by a fair margin.  The reserved flash blocks carry over to the RAM capacity, since the on-board mechanism must be able to perform a 1:1 backup of all available data.
  • While the DDRdrive’s RAM clearance prevents it from being installed adjacent to another full height board, we found it can coexist next to a half-height board without interference.
DDRdrive hits the ground running - PCI-E RAM-based SSD - Storage  2

RAM height prevents installation next to other full-height cards, but the heatsink has no trouble clearing half-height boards.

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