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SCSI
Small Computer System Interface. An intelligent bus-level interface that defines a
standard I/O bus and a set of high-level I/O commands. There are currently many
flavors of SCSI defined by different bus widths and clock speeds. The seven major
variations of SCSI are SCSI 1, SCSI 2 (Fast/Narrow), SCSI 2 (Fast/Wide), Ultra SCSI
(Fast/Narrow), Ultra SCSI (Fast/Wide) – also called SCSI 3, Ultra 2 SCSI (Narrow),
Ultra 2 SCSI (Wide). See also Fibre Channel.
Serverless Backup
Using the eXtended SCSI command, and products like VERITAS
®
NetBackup
™
, the
Hitachi Freedom Storage
™
Lightning 9900
™
V Series offers serverless and LANfree
backup.
SLA
Service level agreements or SLAs are agreements regarding level of service between user
departments and the IT department. SLAs refer to all aspects of IT service, including
availability, performance, and repair.
Snapshot
A term that refers to a copy of a file system at a certain point in time. Snapshots are
used for backup and recovery.
SNMP
Simple Network Management Protocol. SNMP is a protocol used for communication
between simple, server-resident SNMP agents that respond to network administration
requests from simple-to-sophisticated SNMP manager tools running on remote
workstations.
Solaris
The Sun
™
UNIX
®
operating system based on System V, release 4.
Stripe
In RAID terminology, a stripe is when data is read or written in parallel to or from
multiple disks instead of reading or writing all data to one disk. Striping provides
much higher performance through its parallel design.
SVP
Service Processor of the Lightning 9900 V Series.
SWAN
Storage Wide Area Networks (SWANs) are interconnected SANs over long distances.
They are made possible by Fibre Channel and ESCON
®
extenders.
Hitachi Data Sy s t e m s
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