http://www.thessdreview.com/daily-news/latest-buzz/avago-announces-syncro-9380-8e-syncro-9361-8i-high-availability-shared-storage-solutions/
http://www.storagereview.com/lsi_syncro_cs_ha_das_storage_overview
Documentation
LSI/Avago Syncro provide high availability (HA) and application uptime for storage. Syncro shared DAS solutions use two MegaRAID controller cards, delivering shared storage clustering where controller-to-controller connectivity is provided through the SAS interface. Utilizing two volume servers and an inexpensive JBOD, the Syncro 12Gb/s 9380-8e shared DAS solution provides a low-cost HA solution.
Avago maintains its commitment to data protection through Syncro caching for performance acceleration. In the event of a power failure or server failure, unprotected WRITE-back cache data can be lost from DRAM. Measures must be taken to ensure that data in DRAM is preserved and maintained to avoid application/OS corruption or file loss.
Avago CacheVault® technology protects against power outages by directing WRITE-back cache data to non-volatile flash at the instant power is lost. Temporary power, provided by a lowmaintenance supercap energy cell, enables DRAM to off-load the data to flash components. Once power is restored, WRITE-back data is returned to DRAM so applications can return to normal operation.
In the event of a primary server failure, applications are transferred to run on a secondary server node. The secondary server will need access to the Syncro 9380-8e WRITE-back data from the primary server in order to prevent data loss and allow the applications to run continuously. The Syncro cache coherency solution maintains a mirror copy of the primary server’s controller WRITE-back cache data on the secondary server’s controller. The high-speed SAS interconnect provides a direct link for cache data mirroring between Syncro controllers. This optimal solution protects data and maintains application continuity while accelerating WRITE performance.
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