Enterprise solid state devices (SSDs) based on Mash technology are a critical component of the
7000-series systems. Which statement is true?
Flash technology completes operations as fast as, or better than, DRAM.
Enterprise SSDs support bad block management, wear leveling, and error correction codes
(ECC) for data integrity
Read-optimized SSDs are used in place of NVRAM to host the ZFS Intent Log (ZIL)
Write-based SSDs are used to extend the ZFS cache (L2ARC) for reads and writes
The L2ARC is the 2nd Level Adaptive Replacement Cache, and is an SSD based
cache that is
accessed before reading from the much slower pool disks.
Reference:Sun ZFS Storage 7000 System Administration Guide,Cache: L2ARC I/O bytes