Subject: Storage | June 7, 2018 - 06:08 AM | Allyn Malventano
Tagged: toggle NAND, ssd, PCIe 3.0 x4, ONFI, NVMe, Marvell, controller, 88SS1100, 88SS1084
We've seen faster and faster SSDs over the past decade, and while the current common interface is PCIe 3.0 x4, SSD controllers still have a hard time saturating the available bandwidth. This is due to other factors like power consumption constraints of the M.2 form factor as well as the controllers not being sufficiently optimized to handle IO requests at a consistently low latency. This means there is plenty of room for improvement, and with that, we have two new NVme SSD controllers out of Marvell:
Above is the block diagram for the 88SS1100, an 8-Channel controller that promises higher performance over Marvell's previous parts. There is also a nearly identical 88SS1084, which drops to four physical channels but retains the same eight CE (chip enable) lines, meaning it can still talk to eight separate banks of flash, which should keep performance reasonable despite the halving of the physical channels available. Reducing channels to the flash helps save power and reduces the cost of the controller.
Marvell claims the new controller can reach 3.6GB/s throughput and 700,000 IOPS. Granted it would need to be mated to solid performing flash in order to reach those levels, that shouldn't be an issue as the new controllers increase compatibility with modern flash communication protocols (ONFi 4.0, Toggle 3.0, etc). Marvell's NANDEdge tech (their name for their NAND side interface) enters its fourth generation, promising compatibility with 96-layer and TLC / QLC flash.
Specs for the 8-Channel 88SS1100. 88SS1084 is identical except the BGA package drops in size to 12mm x 13.5mm and only requires 418 balls.
Rounding out the specs are the staples expected in modern SSD controllers, like OTP / Secure Drive / AES hardware crypto support, and NVMe 1.3 compliance for the host end of the interface.
While the two new parts are 'available or purchase now', it will take a few months before we see them appear in purchasable products. We'll be keeping an eye out for appearances in future SSD launches!
Subject: Storage | August 19, 2011 - 02:35 AM | Tim Verry
Tagged: ssd, ONFI, Force Series 3, corsair, asynchronous NAND, 90GB
Corsair recently added two new solid state drives to its SSD lineup. The new drives weight in at 90 GB, and make an interesting choice for those that need a bit more space than Corsair’s 60 GB drives provide but not enough to justify a higher priced 120 GB drive. Of the two drives, one will be labeled a Force Series 3 drive, and the other will be a Force Series GT SSD. Tweaktown quoted Corsair in stating:
“We're happy to add the world's first 90GB SSD to our product lineup. With 50% more storage capacity than our 60GB models and at pricing significantly lower than our 120GB models, they help make the Force Series 3 and Force Series GT among the most robust and flexible SSD lines on the market.”
The new 2.5” drives are powered by Sandforce 2281 controllers, and the SATA 3 (6Gb/s) interface. Using the benchmarking utility IOMeter 08, Corsair measured the IOPS (input/output operations per second) of the two drives to be 85,000. The Force Series 3 90GB SSD uses asynchronous NAND, and is capable of sequential read and write speeds of 550MB/s and 500MB/s respectively. On the other hand, the Force Series GT 90GB SSD uses ONFI synchronous flash, and features a slight performance edge with sequential reads of 555MB/s and sequential writes of 505MB/s.
The 90GB SSDs supports SMART monitoring, the TRIM command, and have a MTBF (mean time before failure) of 2 million hours. Further, the drives carry a three year warranty. The drives are available now from authorized retailers with an MSRP of $159 for the Force Series 3 drive and $199 for the Force Series GT SSD.