HP StorageWorks ESL E-Series Tape Library Users Guide (350799-010, September 2007)

EMI Electro-Magnetic Interference refers to unwanted electrical noise present on a
power line. This noise m ay leak from the power lines and affect equ ipment that
isn’t even connected to the p ower line. Such leakage is called a magnetic
field. Magnetic fields are formed when unwanted noise voltages give rise to
noise currents. Such noise signals may a dversely affect ele ctronic equipment
and cause intermittent data problems.
ESD Electrostatic Discharge
Host The device or devices to which the library is connected.
IEC The International Electrotechnical Commission is based in Geneva, Switzerland.
Load port A por t used to add a small number of tapes to the library without interrupting
library functions.
LTO-2 Linear Tape-Open is a tape drive specification backed by HP, IBM and Seagate.
Ultrium 460 tape drives (LTO-2) a re H P’s second generation of LTO tape drives.
LTO-3 Linear Tape-Open is a tape drive specification backed by HP, IBM and Seagate.
Ultrium 960 tape drives (LTO -3) are HP’s third generation of LTO tape drives.
LTO-4 Linear Tape-Open is a tape drive specification backed by HP, IBM and Seagate.
Ultrium 1840 tape drives (LTO-4) are H P’s fourth generation of LTO tape drives.
LVD Low Voltage Differential or LVD is a type of electrical signaling for parallel SCSI
and can reach distances up to 12 meters. All SCSI HP Ultrium 460 tape drives
are LVD devices. SD LT tap
edrivescanbeLVDorHVDdevices.
MSBF Mean Swaps Before Failure
MTBF Mean Time Bet ween Failures
MTTR Mean Time To Repair
NEMA National Electrical Manufacturers Association
Network interface
Card (NIC)
A NIC is a device that handles communication between a device and other
devices on a network.
NVRAM Non-Volatile Random Access Memor y is a type of memor y that retains its
contents when power is turned off. One type of NVR AM is SRAM that is made
non-volatile by connecting it to a constant power source s uch as a battery.
Another type of NVRAM uses EEPROM chips to save its contents when power
is turned off. In this case, NVR AM is composed of a combination of SR AM
and EEPROM chips.
Picker A mechanical component of the extension axis assembly (robotics) which grips
and holds a tape cartridge in transit.
Robotics As used in the context of automated tape libraries; the X-axis, Y-axis, and Z-axis
mechanical assemblies inside the library used to move tape cartridges.
RS-232C Short for Recommended Standard-232C, a standard interface approved
by the Electronic Industries Association (EIA) for connecting serial devices.
This standard is for asynchronous transfer between computer equipment and
accessories. Data is transmitted bit by bit in a serial fashion. The RS-
232
standard defines the function and use of all 25 pins of a DB-25 type connector.
SCSI Small Computer System Interface. An American National Standards Institute
(ANSI) communications standard for attaching peripheral e quipment to
computers.
SCSI I D A unique address (0 to 15) assigned to each device on a SCSI bus.
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