Mylex AcceleRAID 170, Installation Manual

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Glossary
Manual No. 775064 G-19
reported, conservative cache is enabled and all system drives are switched to
write-through cache. Primarily used in fibre enclosures.
SIMM
Single In-line Memory Module, RAM packed on a small circuit board with a
defined edge connector. Two SIMMs are required for a 64-bit memory path
on a Pentium processor. See also
DIMM .
SISL
See SCSI Interrupt Steering Logic (SISL).
SMART
Self-Monitoring Analysis and Reporting Technology, the industry standard
reliability prediction indicator for both the ATA/IDE and SCSI hard disk
drives. Hard disk drives with SMART offer early warning of some hard disk
failures so critical data can be protected.
SNMP
Simple Network Management Protocol, the protocol governing network
management: for monitoring network devices and their functions.
Standard Disk Drive
This term refers to a hard disk drive with SCSI, IDE, or other interface,
attached to the host system through a standard disk controller.
Standby Replacement of Disks
See also Hot Spare . One of the most important features the RAID controller
provides to achieve automatic, non-stop service with a high degree of fault-
tolerance. The controller automatically carries out the rebuild operation
when a SCSI disk drive fails and both of the following conditions are true:
A “standby” SCSI disk drive of identical size is found attached to the same
controller;
All of the system drives that are dependent on the failed disk are redundant
system drives, e.g., RAID 1, RAID 3, RAID 5, and RAID 0+1.
Note: The standby rebuild will only happen on the
SAME
DAC960 controller,
never across DAC960 controllers.
During the automatic rebuild process, system activity continues as normal.
System performance may degrade slightly during the rebuild process.