Areca ARC-1231ML/1261ML/1280ML, ARC-1110, ARC-1130, ARC-1120 manual Array, Auto Reassign Sector

GLOSSARY

Glossary

2TB

The 32-bit file systems have a maximum limitation of 2 TB per volume set. 64-bit versions remove this limitation. so, if you are building large warehouses, you should consider 64-bit versions.

Array

An array is a logical disk comprised of multiple physical hard disks. The number of hard disks in an array is dictated by the type of the array and the number of spares that may be assigned to it. (Arrays are also sometimes referred to as containers). Furthermore, whether an array can be built using part of the space on a disk (as opposed to being forced to use the whole disk) depends upon the implementation. Arrays are typically used to provide data redundancy and/or enhanced I/O performance.

ATA

Acronym for “AT Bus Attachment” - a standard interface to IDE hard disks. Western Digital’s IDE disk interface was standardized by ANSI to form the ATA specification using a 16-bit ISA bus.

Auto Reassign Sector

SATA drives perform automatic defect re-assignment for both read and write errors. Writes are always completed - if a location to be writ- ten is found to be defective, the drive will automatically relocate that write command to a new location and map out the defective location. If there is a recoverable read error, the correct data will be transferred to the host and that location will be tested by the drive to be certain the location is not defective - if it is found to have a defect, it will be automatically relocated to a new location and the defective location mapped out. In the event of an unrecoverable read error, the error will be reported to the host and the location flagged as potentially defec- tive. A subsequent write to that location will initiate a sector test and relocation should that location have a defect.

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