Dell PowerVault LTO User Manual page 73

SCSI drive sense data.
In response to inquiry from the server about an error condition, a packet of SCSI sense bytes that
contains information about the error and that is sent back to the server by the drive.
SCSI log sense data.
In response to inquiry from the server about the tape drive's error logs and counters, a packet of SCSI
sense bytes which contains that information and which is sent back to the server by the drive. Log
sense data is used to diagnose problems, especially if the problems are intermittent.
second.
One sixtieth of a minute.
sense data.
Data that describes an I/O error. Sense data is presented to a server in response to a Sense I/O
command.
server.
A functional unit that provides services to one or more clients over a network. Examples include a file
server, a print server, or a mail server. Synonymous with host.
single-character display.
Located at the front of the tape drive, an LED that presents an alphabetical or numeric code which
represents a diagnostic or maintenance function, error condition, or informational message.
sleep mode.
A power-management function that causes the tape drive's electronics to automatically enter a
low-power mode by which to conserve energy.
Small Computer Systems Interface (SCSI).
A standard used by computer manufacturers for attaching peripheral devices (such as tape drives,
hard disks, CD-ROM players, printers, and scanners) to computers (servers). Pronounced "scuzzy."
Variations of the SCSI interface provide for faster data transmission rates than standard serial and
parallel ports (up to 160 megabytes per second). The variations include:
• Fast/Wide SCSI: Uses a 16-bit bus, and supports data rates of up to 20 MBps.
• SCSI-1: Uses an 8-bit bus, and supports data rates of 4 MBps.
• SCSI-2: Same as SCSI-1, but uses a 50-pin connector instead of a 25-pin connector, and supports
multiple devices.
• Ultra SCSI: Uses an 8- or 16-bit bus, and supports data rates of 20 or 40 MBps.
• Ultra2 SCSI: Uses an 8- or 16-bit bus and supports data rates of 40 or 80 MBps.
• Ultra3 SCSI: Uses a 16-bit bus and supports data rates of 80 or 160 MBps.
• Ultra160 SCSI: Uses a 16-bit bus and supports data rates of 80 or 160 MBps.
software.
Programs, procedures, rules, and any associated documentation pertaining to the operation of a
computer system.
speed matching.
A technique used by the tape drive to dynamically adjust its native (uncompressed) data rate to the
slower data rate of a server. Speed matching improves system performance and reduces backhitch.
T
TapeAlert.
A patented technology and ANSI standard that defines conditions and problems that are experienced
by tape drives.
TapeAlert flags.
Status and error messages that are generated by the TapeAlert utility and display on the server's
console.
Glossary 67