GLOSSARY
SMART
This technology provides users with advanced warning of Disk Drive failures, thus enabling the Operating System to warn Users of potential failure. S.M.A.R.T. was included in EIDE drives with the ATA-3 and later specification.
SNMP
Since it was developed in 1988, the Simple Network Management Protocol has become the de facto standard for inter-network manage- ment. Because it is a simple solution, requiring little code to imple- ment, vendors can easily build SNMP agents into their products. SNMP is extensible, allowing vendors to easily add network management functions to their existing products. SNMP also separates the man- agement architecture from the architecture of the hardware devices, which broadens the base of multi-vendor support.
Volume Set
A volume set is a concatenation of storage elements that may be RAID arrays, JBODs, or simply areas of disks that are not part of RAID ar- rays.
Write-back
When a cache is operating in write-back mode, data written into the cache is not immediately written out to its destination in second- ary storage unless the heuristics governing the flushing of dirty data demands otherwise. This methodology can improve the efficiency of write operations under favorable circumstances. However, its use can potentially lead to incoherences in a system that is not protected from power fluctuations or other failures.
Write-through
When a cache is operating in write-through mode, data written into the cache is also written to the destination secondary storage devices. Essentially write completion does not occur until the data is written to secondary storage. Thus the contents of the cache and the secondary storage are always consistent. The advantage is that the possibility
