Pacific ESI provides a unique blend of RAID and NAS storage systems. We specialize in the mid-sized Infortrend range with capacities ranging from several TB to over 50TB. At the lower end of the scale, we use the excellent ARECA and LSI Logic controllers to provide internal RAID systems within server enclosures for the 1TB-10TB range. At the high end of the scale, we use the large Fujitsu ETERNUS Raid systems which provide storage from 10 to 100 Terabytes and more
The Infotrend B12F RAID subsystem comes with sophisticated high availability features including redundant RAID controllers, cross-controller 'sync-cache' channels, a passive backplane, and redundant cooling and power supply modules. The highest performance density is achieved within a compact design which uses only IU of rack space and exploits the latest generation of Small Form Factor (SFF) 2.5 inch disk drives. The system provides dual redundant 4GB fibre-chanel (FCAL) back to the host system, with the redundancy extending to both power supplies and fans. Finally, redundant network ports provide both a web-based and an SNMP remote monitoring interface to the entire system. (Download DataSheet)
Thanks to the low vibration and reduced airflow requirements of 2.5-inch drives, the B12F runs with higher reliability. The B12F does not compromise on its advanced RAID functionality because of its compact size. The B12F supports RAID levels 0, 1, 3, 5, 6, multi-level logical volumes, and all with a renowned, proven, firmware functionality.
The B12F grants users the flexibility to intermix SAS/SATA disk drives and SATA Solid State Disks (SSDs) in master RAID and slave 1U expansion enclosures for a tiered storage environment.
The higher-performance and reliable SAS drives and SSDs would be used for the critical and I/O-intensive access, while less expensive (per GB) SATA disk drives are ideal for less-critical data, archive, or disk-to-disk (D2D) backup.
The key to the B12F is the use of 2.5 inch disk drives. These drives are designed for environments requiring higher reliability and higher I/O density. The benefits of 2.5" drives are significant. SFF 2.5-inch drives are simply smaller than their 3.5 inch counterparts. That means more drives can be integrated in the disk array enclosures Using 2.5" drives allows more spindles in less than half of rackmount space than using the 3.5" counterparts. And more spindles mean higher IOPS performance.
SFF 2.5-inch drives consume 45% less power than their 3.5-inch counterparts. They run cooler with reduced airflow requirements, which also decrease the chance of encountering thermal issues and the cost on providing airflow ventilation. In addition to the reduction in cost, and smaller environmental footprint, less power means cooler enclosures, and therefore a higher overall reliability.
Additionally, they are 70% smaller: With an estimated $1000+ cost per square foot in an average data center, they permit the installation of 2.5 times the numbers of drives in the same data center footprint. These SFF 2.5-inch drives also have a higher MTBF: High-end 15,000RPM 2.5-inch SAS drives feature a 1.6 million hour MTBF, which is 15 percent higher than the 1.4 million hour by 3.5-inch disk drives.
Spinning multiple drives in a RAID enclosure can introduce interference from the seek acceleration by one drive seeking data to another that is writing. The transmitted vibration can cause retries and hence the overall array performance can be affected. In a high-transaction rate and random-access environment with intensive seek operations, the potential performance loss can be eased by 2.5-inch drives because they do not generate sufficient vibration during seeks to degrade the overall performance.
Other models are available covering a broad spectrum of capacities. Several types of network interfaces are supported.
The above chassis contains the controllers and the first 12 2.5-inch drives. Additional (daisy-chain) chassis modules provide an expansion capability well beyond those first 12.