Adaptec 412R User Guide - Page 198

LVD low voltage differential, ownership, SAF-TE SCSI Accessed Fault-Tolerant Enclosure

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DuraStor 412R/6320SS/7320SS Installation and User's Guide LVD (low voltage differential) LVD is a method of powering SCSI cables that will be formalized in the SCSI-3 specifications. LVD uses less power than the current differential drive (HVD), is less expensive, and allows for higher speeds such as those of Ultra2 SCSI. LVD requires 3.3 volts (versus 5 volts for HVD). O ownership In an active-active configuration, each controller has ownership of arrays and dedicated spares. If one controller fails, the other controller assumes temporary ownership of its arrays and dedicated spares. P PSU Stands for Power Supply Unit. S SAF-TE (SCSI Accessed Fault-Tolerant Enclosure) The SAF-TE specification is an open specification designed to provide a comprehensive standardized method to monitor and report status information on the condition of disk drives, power supplies, cooling systems, and other components used in highavailability LAN servers and subsystems. See also enclosure. SAN (Storage Area Network) A high-speed, special-purpose network that interconnects different data storage devices with data servers, on behalf of a larger network of users. SCSI (Small Computer System Interface) SCSI is an industry standard for connecting peripheral devices and their controllers to an initiator. Storage devices are daisy-chained together and connected to an HBA. The HBA provides a shared bus that attached peripherals use to pass data to and from the host system. Examples of devices attached to the HBA include disk drives, CD-ROM drives, optical disk drives, and tape drives. In Glossary-4

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Glossary-4
DuraStor 412R/6320SS/7320SS Installation and User’s Guide
LVD (low voltage differential)
LVD is a method of powering SCSI cables that will be formalized in
the SCSI-3 specifications. LVD uses less power than the current
differential drive (HVD), is less expensive, and allows for higher
speeds such as those of Ultra2 SCSI. LVD requires 3.3 volts (versus
5 volts for HVD).
O
ownership
In an active-active configuration, each controller has ownership of
arrays and dedicated spares. If one controller fails, the other
controller assumes temporary ownership of its arrays and
dedicated spares.
P
PSU
Stands for Power Supply Unit.
S
SAF-TE (SCSI Accessed Fault-Tolerant Enclosure)
The SAF-TE specification is an open specification designed to
provide a comprehensive standardized method to monitor and
report status information on the condition of disk drives, power
supplies, cooling systems, and other components used in high-
availability LAN servers and subsystems
.
See also
enclosure
.
SAN (Storage Area Network)
A high-speed, special-purpose network that interconnects different
data storage devices with data servers, on behalf of a larger
network of users.
SCSI (Small Computer System Interface)
SCSI is an industry standard for connecting peripheral devices and
their controllers to an initiator. Storage devices are daisy-chained
together and connected to an HBA. The HBA provides a shared
bus that attached peripherals use to pass data to and from the host
system. Examples of devices attached to the HBA include disk
drives, CD-ROM drives, optical disk drives, and tape drives. In