Intel today announced its third-generation, enterprise-class solid-state drive series (SSD) that adds 15 times the maximum sequential write performance and twice the read performance of its predecessor.
Like the 710 series, the DC S3700 uses multi-level cell (MLC) NAND flash chips inside a 2.5-in. hard disk drive form factor with a serial ATA (SATA) interface. It is known in the industry as an SSD as opposed to a PCIe flash card. Intel also sells the 910-series flash card, which is higher priced due to its higher performance.
The DC 3700 SSD comes in capacities ranging from 100GB to 800GB.
The new SSD's endurance, or number of writes the drive is capable of receiving over its lifetime, is also double that of its predecessor.
"Fundamentally, this drive has higher performance, more predictable performance, with the highest quality of service and high endurance technology," said Roger Peene, director of data center SSD marketing for Intel. "When we set out to design this drive for the data center, we really focused on getting the best IOPS consistency for superior quality of service."
The new DC S3700 Series SSD (the 'DC' stands for data center and the 'S' for SATA) also adds a 1.8-in. form factor to the 2.5-in. drive Intel had been selling to enterprise shops.
The DC S3700 write endurance is twice that of the SSD 710 series. An 800GB model, for example, can sustain 10 full drive writes per day, or 8TB, every day for five years, according to Peene. While not as applicable a metric, Intel also claims a meantime between failures (MBTF) prediction of 2 million hours.
Along with higher endurance, the SSD includes a new data loss protection feature, which maintains sufficient internal power via internal electrolytic capacitors with self-testing capabilities that can alert a systems administrator to irregularities. If power is lost, the drive automatically redirects writes in progress from the cache directly to the NAND flash, avoiding data loss, Peene said.
Intel also added cyclic redundancy check (CRC) firmware and logical block address validation to the DC S3700. CRC, a cryptographic hash tag, ensures data is valid and uncorrupted from the time it is written to the controller, saved to the NAND flash and read back to a host system.
In 2009, Intel released its first enterprise-class SSD, the X-25E, which used high cost, high performance single-level cell (SLC) NAND flash. The X-25E drive offered sequential read/write speeds of up to 252MBps and 208.8MBps, respectively, and 35,000 IOPS (4KB random read) and 3,300 IOPS (4KB random write). The X-25E had an average 75 microsecond read latency.
The SSD 710 series SSD marked Intel's move from SLC to MLC NAND flash in its enterprise flash products. The SSD delivered sequential read/write speeds of up to 270MBps and 210MBps, respectively and 38,000 random read IOPS and 2,700 write IOPS. The SSD 710 had a 75 microsecond read latency and an 85 microsecond write latency. A millisecond is one-thousandth of a second; a microsecond is one millionth of a second.
The new DC S3700 Series SSD offers sequential read/write speeds of up to 500MBps and 460MBps, respectively, and 75,000 IOPS (4KB random read) and 36,000 IOPS (4K random write). The DC S3700 suffers about 50 microsecond average of read latency and 65 microsecond write latency, according to Intel.
"When someone is deploying a virtualized environment, this kind of performance in the I/O subsystem will allow end users to put more virtual machines onto a single base of hardware," Peene said. "You'll see very nice consistent performance over time. Our performance will only vary no more than 15%."
For example, in big data and Hadoop file system deployments, the DC S37000 SSD increases the performance for mapping and sorting functions over its predecessor allowing system administrators to deploy fewer nodes in a server cluster for the same or better performance, Peene claimed.
The new SSD also offers a SATA 3.0 (6Gbps) interface versus the SATA II (3 Gbps) interface of its predecessor.
As with the SSD 710, the new DC S3700 SSD is based on a new proprietary Intel ASIC and firmware and includes native 256-bit AES encryption algorithm software in the controller. As with its predecessor, the DC S3700 uses about 20% of its flash for overprovisioning, meaning the host sees only 80% of the physical NAND flash capacity.
Overprovisioning is useful during operations such as garbage collection (the removal of data marked for deletion) and wear-leveling (evenly spreading writes across the flash for greater endurance). The additional 20% NAND flash capacity in the Intel SSD allows the drive to more quickly and easily free up spare blocks. In doing so, it increases performance and lowers the write amplification (when the flash controller must erase a block marked for deletion before performing a new data write).
Intel is currently shipping samples of the DC S3700 to system manufacturers and plans to go into general production in the first quarter of 2013.
Suggested retail prices are as follows:
- 2.5-in. form factor
- $235 - 100GB
- $470 - 200GB
- $940 - 400GB
- $1,880 - 800GB (based on 1,000-unit quantities)
- 1.8-in. form factor
- $495 - 200GB
- $965 - 400GB
Lucas Mearian covers storage, disaster recovery and business continuity, financial services infrastructure and health care IT for Computerworld. Follow Lucas on Twitter at @lucasmearian or subscribe to Lucas's RSS feed . His e-mail address is email@example.com.