The HP Enterprise Modular Library (EML) E-Series Tape Libraries provide performance, reliability
and investment protection for your data protection needs. With up to 16 HP LTO tape drives, the
EML E-Series boasts native throughput of over 6.9 TB/hr. Based on the HP Extended Tape Library
Architecture (ETLA), controllers help to ensure that rogue I/O requests do not interrupt the backup
or recovery job in progress. Additionally, the hardware itself is very reliable, designed for 24x7
environments. Investment protection is achieved through the addition of expansion modules, the
EML E-Series library scales within the library footprint to 16 drives and 442 slots for maximum
performance, or 8 drives and 505 slots for maximum capacity.
The EML E-Series Tape Libraries contain the following features:
•Scalable capacity from 71 slots to 505 slots
•Scalable performance up to 16 Ultrium tape drives with 442 slots
•Interface controllers protect tape drives from SAN events
•Remote management via Command View for Tape Libraries software or the command line
interface
•Easy to use touch screen graphical user interface
•User configurable load ports with removable magazines
•Certified under the HP Enterprise Backup Solution (EBS)
•Factory and field rack configurations
•2,000,000 mean swaps between failure
Available configurations
You can order the library in the following configurations.
The 12U base module (see (page 10) and (page 11)) resides at the top of the library below the
2U reserved space or the switch for the internal network.
In the EML 71e, the base module contains a total of 71 LTO slots. Five slots within a load port are
configurable as either import/export slots or storage slots. No reserved slots are available.
In all other EML configurations, the base module contains a total of 103 LTO slots. Five slots are
configurable as either import/export slots or storage slots within a load port through the use of a
removable magazine. You can configure 9 slots as reserved. A common use for reserved slots is
for holding cleaning cartridges. The number of usable permanent slots depends on whether it is
the bottom module in the library because the library floor is always attached to the bottom module
2. Switch for the internal network (in libraries with LTO4 or
later tape drives only)
and the floor limits the distance that the robot can travel. If the library floor is attached to the base
module, the bottom two rows (containing 16 slots) cannot be used.
The robotics unit is located at the top of the base module. When fully retracted (or parked), the
robot is fully contained within a 2U space. For safety reasons, the robot is parked before the center
door can be opened.
Within the robot, a lift table assembly contains a motor, pulleys, and cables to move the table up
and down to a specific level in the library. The picker assembly moves front and back, and
side-to-side along the table. A barcode scanner, attached to the bottom of the picker assembly,
scans targets on rack components for alignment, as well as barcode labels on tape cartridges, if
they are present. The picker has fingers that remove and insert tape cartridges among storage
slots, tape drives, or load ports.
Figure 3 Robotics unit
The base module has two windows on the front for viewing the robotic motion inside the library.
A load port door is located to the right front (see (page 10)) where a 5-cartridge magazine can
be loaded with tape cartridges for insertion into or removal from the library. The load ports are
mechanical devices that enable you to import and export tape cartridges to and from the library
through removable magazines, or act as additional library storage slots. These two functions for
a load port cannot be mixed; you must either designate an entire load port to be import/export
slots or storage slots. The base module contains a load port capable of using one 5-cartridge
magazine. An operator control panel (OCP) is located at the bottom front of the base module.
The base module contains an autoranging power supply (a redundant power supply is optional),
card cage, cable management features, and space for mounting up to four LTO-technology tape
drives on the back.
12Library overview
2. Lift-flex retraction handle1. Robotics unit
4. Robot picker3. Ratchet tool
6. Table assembly5. Lift suspension cable
8. Lift-flex cable7. Lift pole
The card cage in the base module (see (page 13)) provides six cPCI slots for the following:
•Library robotics controller (see (page 16)) A single slot, 6U-wide cPCI board having Ethernet
ports and an RS-232 port. One Ethernet port connects this controller to the Interface Manager
card.
•Interface Manager card (see (page 16)) A single slot, 4U-wide cPCI board having six Ethernet
ports. This board contains 128MB of dynamic random access memory (DRAM) plus a 256MB
CompactFlash memory card, both in their own sockets. A 2U-wide adapter panel next to the
4U-wide Interface Manager card enables it to fit in the lowest 6U-wide card cage slot.
•Interface controller A cPCI board, having two FC ports for connecting to the SAN, along with
four FC ports for connecting up to four HP LTO2 or LTO3 tape drives. LTO4 and later tape
drives do not connect to the interface controller; instead, they connect directly to the SAN.
The interface controller is available in two speeds. The e2400-FC 2Gb interface controller
has an FC speed of 2 Gbps, is 6U wide, and uses a single slot (see (page 18)). The e2400-FC
4Gb interface controller has an FC speed of 4 Gbps, is 4U wide, and uses two slots (see
(page 18)).
Figure 4 Base module card cage (LTO3 tape drives shown)
shown)
5. Adapter panel
The cable management feature is a spool, mounted near the tape drives, that enables LAN and
FC cables to be dressed and routed away from hot plug or hot swap components.
Expansion modules
Three expansion modules are available to increase library capacity beyond that provided by the
base module. These expansions modules are:
•Tape drive expansion module
•Card cage expansion module
•Capacity expansion module
IMPORTANT:If you are adding expansion modules to an EML 71e, you must purchase a capacity
upgrade license for Command View TL (part number AH063A). This license upgrades your base
module from 71 slots to 103 slots. You must also make sure that your rack has side panels and
doors installed to comply with regulatory requirements.
The tape drive expansion module is an 8U chassis containing 94 LTO slots (84 permanent and
10 configurable). The number of usable permanent slots depends on whether it is the bottom module
in the library because the library floor is always attached to the bottom module and the floor limits
the distance that the robot can travel. If the library floor is attached to the tape drive expansion
module, the bottom row (containing seven slots) cannot be used.
CAUTION:Never operate the library with the floor removed. The robot can be damaged.
The tape drive expansion module has three windows on the front for viewing the robotic motion
inside the library. To the right is a 10-cartridge configurable load port that holds two 5-cartridge
magazines.
On the back, the module contains one primary power supply with a slot provided for another
optional redundant power supply. Up to four Ultrium tape drives can be installed in the tape drive
expansion module. Cable management features are provided for cable routing and dressing.
Figure 5 Tape drive expansion module
5. Cable management features
Card cage expansion module
The card cage expansion module is a 4U chassis that contains 48 permanent LTO slots and space
for additional interface controllers. This module must be located directly below the top 8U tape
drive expansion module. The number of usable permanent slots depends on whether it is the bottom
module in the library because the library floor is always attached to the bottom module and the
floor limits the distance that the robot can travel. If the library floor is attached to the card cage
expansion module, the last two rows (containing 16 slots) cannot be used.
CAUTION:Never operate the library with the floor removed. The robot can be damaged.
The front of the card cage expansion module has one window for viewing robotic motion inside
the library. On the back, six PCI card slots are available for additional interface controllers to
expand the library tape drive capacity. One interface controller is added for every four additional
LTO2 or LTO3 tape drives. LTO4 and later tape drives do not connect to an interface controller;
instead, they connect directly to the SAN. Two power supplies are located at the bottom of the
card cage, and two cooling fans are on the right.
2. 10-Cartridge load port1. Viewing windows
4. Tape drives (LTO3 tape drives shown)3. Power supplies (optional redundant power supply shown)
14Library overview
Figure 6 Card cage expansion module
5. Fans
Capacity expansion module
The capacity expansion module is an 8U chassis containing 120 LTO slots (110 permanent and
10 configurable). If the library floor is attached to the capacity expansion module, the bottom row
containing 10 slots is blocked and cannot be used.
CAUTION:Never operate the library with the floor removed. The robot can be damaged.
2. 4U blank cover1. Viewing window
4. Power supplies3. Card slots
If the capacity expansion module is placed below the base module or a tape drive expansion
module, six slots at the top of the back wall cannot be used because the tape drives in the module
above it prevent the robot from reaching these slots.
On the front of the capacity expansion module are three windows for viewing the robotic motion
inside the library. To the right is a 10-cartridge configurable load port that holds two 5-cartridge
magazines.
On the back of the capacity expansion module are cable management features for cable routing
and dressing.
Figure 7 Capacity expansion module
2. 10-Cartridge load port1. Viewing windows
3. Cable management features
Controller cards
This section explains the function of the three major cards that control the library. These cards are:
•Library robotics controller
•Interface Manager card
•Interface controller
Controller cards15
Library robotics controller
The library robotics controller contains firmware to control the robot, communicate with the Interface
Manager card, manage the library servo and vision control, and monitor the door and load port
sensor status.
Robot commands are sent from hosts in the SAN to an interface controller, which directs them over
an internal Ethernet network to the library robotics controller. The library robotics controller translates
these commands into movements to be performed by the robot.
Figure 8 Ports on the library robotics controller
1. Private Ethernet port (not used)
Interface Manager card
The Interface Manager card is an HP proprietary management card designed to consolidate and
simplify the management of multiple interface controllers installed in the library. It also provides
SAN-related diagnostics and management for library components, including the interface controllers,
tape drives, and robotics. The Interface Manager card, in conjunction with HP Command View TL
software, provides remote management of the library by using a serial, Telnet, or Web-based
graphical user interface (GUI).
Figure 9 Ports on the Interface Manager card 342213–001 or 393531–001
controller)
5. Auxiliary RJ-11 serial connector (not used)
2. Public Ethernet port (connection to Interface Manager
card)
4. CLI port (RS-232–HP services only)3. Reserved port (not used)
2. Private Ethernet ports to interface controllers1. Cascade Ethernet port (connection to library robotics
4. Serial port3. Network Ethernet port (to management station)
Figure 10 Ports on the Interface Manager card 480240-001
controller)
5. USB port
16Library overview
2. Private Ethernet ports to interface controllers1. Cascade Ethernet port (connection to library robotics
4. Serial port3. Network Ethernet port (to management station)
The Interface Manager card communicates with the management station over the LAN. The
management station is a Microsoft Windows-based PC (server) that hosts the Command View TL
software. Ideally, the management station should have a static IP address, and be dedicated for
use with the Interface Manager card and Command View TL software.
IP connections on the EML can be IPv4 or IPv6 format. The library can be configured to use one
or both formats, but can not operate if neither protocol is enabled. View the IP connections on the
Identity Screen (from the Home screen select Status, then Identity Screen).
Figure 11 Viewing IP connections from the Identity Screen
Enable or disable the protocols from the Change Network Settings screen, then view and save the
settings from that same screen.
To view and change the settings for either IPv4 or IPv6:
1.From the Home screen, select Configuration.
2.From the Library Configuration menu select Change Network Settings.
Figure 12 Viewing the Change Network Settings screen
3.To enable or disable IPv4 or IPv6, touch the appropriate Enable or Disable button.
4.To view or change the settings, touch the appropriate Settings button.
NOTE:Some settings are read-only.
Controller cards17
5.To save any changes to the network settings, select the Save button at the bottom, right of the
OCP.
Any client machine on the LAN can communicate with the Interface Manager card either through
the GUI or through a command line interface (CLI). At a higher level, multiple libraries, each
containing an Interface Manager card, can be connected to a single management station. Each
Interface Manager card can communicate with only one management station, but the management
station can communicate with multiple Interface Manager cards.
After being configured, the Interface Manager card is used to configure the interface controllers
based on knowledge of the library and SAN. As robotics commands are received from the interface
controllers, the Interface Manager card acts as a switch to relay these commands to the library
robotics controller. The Interface Manager card contains on-board Flash memory to provide a
persistent history of the library and storage network health.
Interface controller
The interface controller is an HP proprietary card that provides FC connectivity for LTO2 and LTO3
tape drives and robotics in the SAN. Commands, data, and status information are transferred to
and from this controller, from hosts, the robot, and the LTO2 and LTO3 tape drives. One interface
controller can manage up to four LTO2 or LTO3 tape drives.
LTO4 and later tape drives do not connect to an interface controller; instead, they connect directly
to the SAN. Libraries that contain only LTO4 or later tape drives still need one interface controller
which is used to direct commands to the robot. The interface controller is available in two speeds:
2 Gbps and 4 Gbps.
Ports on the e2400-FC 2Gb interface controller
Figure 13 Ports on the e2400-FC 2Gb interface controller
Ports on the e2400-FC 4Gb interface controller
Figure 14 Ports on the e2400-FC 4Gb interface controller
2. FC ports to hosts1. FC ports to LTO2 and LTO3 tape drives
4. Serial port3. Ethernet port (connection to Interface Manager card)
18Library overview
2. FC ports to hosts1. FC ports to LTO2 and LTO3 tape drives
4. Serial port3. Ethernet port (connection to Interface Manager card)
Changing the master controller (SIPP master)
One interface controller is assigned by the Interface Manager card as the master controller the
SIPP master. Only the SIPP master is designated to send commands to the library robotics controller.
If multiple interface controllers are present, Command View TL software, through the Cabling View,
can be used to determine which one is acting as the SIPP master. Changing the SIPP master requires
a service-level password and command using the CLI (Telnet or serial). The commands are:
SERVICE L&TTPASSWORD
SET IPCONNECTION INTERFACE MASTER X
, if the IM firmware is i182 or lower
SERVICE L&TTPASSWORD
SET IPCONNECTION MASTER X
, if the IM firmware is I200 or higher
where L&TTPASSWORD is the Library and Tape Tools (L&TT) password and X is the interface
controller number. Obtain the password from the web site L&TT web siteby calling HP Support to
get a 2–day ltt service password. Find the interface controller number by using the SHOWINTERFACE INFO ALL CLI command.
If the master interface controller (designated SIPP master) is replaced, the Hardware Replacement
wizard sets up the SIPP master. If the master interface controller (designated SIPP master) is moved
to another interface controller in the library, perform the following manual service steps:
1.Remove all partitions.
2.Remove all host maps.
3.Log in to the CLI and obtain service-level access.
4.Use the SET IPCONNECTION MASTER X command to make a particular interface controller
the SIPP master. Currently, the Interface Manager card does not automatically failover an
interface controller, even if the previous SIPP master is missing.
5.Reconfigure maps and partitions.
Functional description
The library receives commands and data throughout the SAN from hosts running applications from
approved independent software vendors (ISVs). Host bus adapters (HBAs) in servers send this traffic
over FC links, usually through FC switches. For LTO4 and later tape drives, the traffic goes directly
to the tape drive; but for LTO2 and LTO3 tape drives, the traffic first goes through an interface
controller. One interface controller can connect up to four LTO2 or LTO3 tape drives. For all
libraries, regardless of whether they contain LTO2 and LTO3 or LTO4 and later tape drives, at
least one interface controller is required to pass tape cartridge changer (robotics) commands to
the Interface Manager card over a private network. The Interface Manager card passes these SCSI
commands on to the library robotics controller over the private network, taking advantage of the
error handling and retry capabilities of TCP/IP.
Functional description19
Figure 15 Library network
2. FC Switch (SAN)1. Hosts
4. Interface Manager card3. Interface controller
6. Library robotics controller5. LTO2 or LTO3 tape drives
8. OCP7. Robot
10. Telnet connection9. Serial connection
12. Library boundary11. Management station
14. Switch for the internal network13. LTO4 and later tape drives
In addition to receiving traffic from the interface controllers, the Interface Manager card receives
command and diagnostic requests over an Ethernet connection from three other possible sources.
The majority of requests come from a management station where Command View TL software
resides. The other two sources are through a Telnet session or a serial interface. The Interface
Manager card works in the background to manage library functions. It configures the interface
controllers to direct commands from host systems to the appropriate LTO2 or LTO3 tape drive or
to the library robotics controller.
The library robotics controller receives commands over an internal private network and from the
OCP. It manages robotics movement, monitors the door and load port sensor status, and stores
library information in volatile memory.
Load ports and magazines
The load ports are mechanical devices on the front of the library that enable you to import and
export tape cartridges to and from the library through removable magazines, or act as additional
library storage slots. These two functions for a load port cannot be mixed; you must either designate
an entire load port to be import/export slots or storage slots. The base module contains a load
port capable of using one 5-cartridge magazine. The 8U expansion modules contain load ports
capable of using two 5-cartridge magazines each.
20Library overview
Figure 16 Library load ports on 40U configuration
Tape drives
The Ultrium tape drive is a high performance streaming tape drive that uses LTO technology. The
library can use Ultrium 460 (LTO 2), Ultrium 960 (LTO 3), Ultrium 1840 (LTO4), Ultrium 3280
(LTO5) and Ultrium 6650 (LTO6) tape drives.
The Ultrium 960 and later include support for both rewriteable and Write-Once, Read-Many
(WORM) tape cartridges. WORM tape cartridges provide an enhanced level of data security
against alteration of data because you cannot erase or overwrite them. To check whether your
backup or archive software application supports WORM tape cartridges, see the following web
site: http://www.hp.com/go/connect.
For optimum performance, always use a tape cartridge that matches the specifications of your
tape drive. You can find comparisons between the Ultrium tape drives in (page 86).
Tape cartridges and cleaning cartridges are specifically formatted for use with Ultrium drives. To
order Ultrium tape cartridges, see “Ordering HP tape cartridges and barcode label packs” (page
102).
Switch for the internal network
CAUTION:Do not connect this switch to your local LAN. It is for internal library use only.
Connecting this switch to the LAN could cause library components to perform incorrectly or report
failures.
The 24-port Ethernet switch provides a private management network to connect the Interface
Manager card to the LTO4 or later tape drives. You must install one switch in each library that
contains LTO4 or later tape drives.
Tape drives21
Figure 17 Ports on the switch for the internal network
1. 10/100Base-TX RJ-45 ports
Operator control panel
The OCP displays library status information and enables you to access the library menus with a
touch screen. Use these menus to view and change the library settings, move tape cartridges,
obtain status information, or run diagnostic tests. Functions provided by the OCP are:
•Robotic and tape drive firmware revision reporting
•Library configuration
•Library and tape drive serial number reporting
•Critical component status report
•Critical component failure notification
•Ability to move tapes to and from any location
•Ability to configure barcode label length and justification reporting to the front panel and to
the host
•Access to error information
•Adjust screen contrast
Figure 18 Location of the OCP
Numbering
All of the tape cartridge slots and tape drives in a library are numbered with a coordinate system.
You might see these numbers in your application software or in error or diagnostic messages. Error
22Library overview
messages often include a slot location in the format MRC x,y,z. This identifies a module (x), row
(y), and column (z) location.
Each module has a different number of available slots, but a common numbering scheme for
identifying the slot location.
The library numbers the LTO slots using the following scheme:
•In general, the library numbers the slots one module at a time, starting with the top module.
For slot numbering purposes, the 12U base module is considered to be two modules: an 8U
base module and a 4U base module.
•Within each module, column numbering starts with 1 at the left column as viewed from the
front of the library.
•Within each module, row numbering starts with 1 at the top row.
•Any reserved slots, located in the first column of the 8U base module, and taking up as many
as nine slots, are not included in the numbering scheme. A common use for reserved slots is
for holding cleaning cartridges.
NOTE:Reserved slots are not available on the EML 71e.
•If the load port slots are configured as import/export slots, they are skipped and not counted
in the numbering of storage slots. If the load port slots are instead configured as storage slots,
they are counted in the numbering scheme.
NOTE:Reconfiguring the load port slots for either import/export or storage changes the slot
numbering in any lower modules the next time you perform an inventory.
•Some slots are not available in the bottom module in the library because the floor limits the
distance that the robot can travel.
CAUTION:Never operate the library with the floor removed. The robot can be damaged.
The slot numbering for various modules are shown on the following pages:
•Base module of the EML 71e ((page 24))
•Base module of all other configurations ((page 25))
•Tape drive expansion module ((page 25))
•Card cage expansion module ((page 26))
•Capacity expansion module ((page 26))
Numbering23
Figure 19 Slot numbering in the base module for the EML 71e
3. Slots available for data cartridges
2. Array targets for the barcode scanner1. Robot park zone
4. Software demarcation between upper and lower modules
for slot counting purposes
6. Expansion identification label5. Tape drives
8. Column numbering7. Row numbering
10. 8U base module9. Load port slots
12. Tape drive numbering11. 4U base module
24Library overview
Figure 20 Slot numbering in the base module for all other EML configurations
2. Array targets for the barcode scanner1. Robot park zone
3. Reserved slots-can be used for cleaning cartridges or
data cartridges
5. Slots available for data cartridges
4. Software demarcation between upper and lower modules
for slot counting purposes
6. Slots unavailable for use when the library floor is installed
in this module
8. Expansion identification label7. Tape drives
10. Column numbering9. Row numbering
12. 8U base module11. Load port slots
14. Tape drive numbering13. 4U base module
Figure 21 Slot numbering in the tape drive expansion module
in this module
9. Load port slots
2. Array targets1. Slots available for data cartridges
4. Tape drive numbering3. Slots unavailable for use when the library floor is installed
6. Expansion identification label5. Tape drives
8. Column numbering7. Row numbering
Numbering25
Figure 22 Slot numbering in the card cage expansion module
2. Array targets1. Slots available for data cartridges
4. Expansion identification label3. Slots unavailable for use when the library floor is installed
in this module
6. Column numbering5. Row numbering
Figure 23 Slot numbering in the capacity expansion module
3. Slots unavailable for use when the library floor is installed
in this module
7. Load port slots
Command View TL
Command View TL provides a browser-based GUI for remote management and monitoring of the
Interface Manager card through a LAN. Command View TL is the preferred method for controlling
the Interface Manager card. In conjunction with the Interface Manager card, Command View TL
provides the following:
•Configuration and management of the Interface Manager card and FC interface controllers
•Management of the entire library system
•Hardware inventory and identity information
•Status information for connected hardware
•Error reporting and comprehensive error logs
•Firmware management
•License management
2. Array targets1. Slots available for data cartridges
4. Slots unavailable for use when a base module or tape
drive expansion module is above this module
6. Column numbering5. Row numbering
Command View TL is installed on a management station and communicates with the Interface
Manager card through the LAN. The management station processes information from the Interface
Manager card and serves up the Command View TL GUI. You can access Command View TL from
26Library overview
the management station directly, or through any client on the LAN using a browser-based GUI.
Multiple Command View TL clients can be simultaneously open across the LAN, and multiple
libraries can be managed through the Command View TL software.
See the Command View TL documentation at http://www.hp.com/support/cvtl for prerequisites,
installation, and operating instructions.
IMPORTANT:If you are upgrading an EML 71e, you must purchase a capacity upgrade license
for Command View TL (part number AH063A). This license upgrades your base module from 71
slots to 103 slots.
Library and Tape Tools
Library and Tape Tools (L&TT) is a collection of storage hardware management and diagnostic
tools assembled into a single, convenient program. L&TT offers a GUI or command screen interface
(CSI), enabling you to perform the following functions with the library:
•Installation check Guides you through a basic installation check of the library. The software
helps you choose an appropriate HBA, making sure that the device is detected by the system,
and verifying key device functionality.
•Device identification Identifies the storage products connected to the system, along with key
information on product configuration and status.
•Troubleshooting tests Provides various tests to verify product functionality or to isolate product
issues. Tests include device self-tests, read/write tests on tape drives, exerciser tests for
autoloaders and libraries, and specific device utilities.
•Support ticket generation If you experience a problem with a storage product, L&TT can
generate a support ticket that includes essential information for troubleshooting the problem.
•Automatic notification of Web updates If a connection to the Internet is present and Web
updates are enabled in the tool preferences, L&TT automatically informs you of the following
updates, if available, each time the program is started:
◦New versions of L&TT
◦New firmware files for connected devices
◦New device-specific functionality (such as new or updated tests) for connected devices
For more information on L&TT, go to the web site http://www.hp.com/support/tapetools.
Library and Tape Tools27
2 Using the library
This chapter describes operating procedures for the library.
Powering on the library
1.Close the center door of the library and turn the center-door knob one-quarter turn clockwise
to lock it.
Figure 24 Closing the center door
2.At the back of the library, press the library main power switch to the I (On) position.
Figure 25 Library main power switch control
1. Library main power switch
NOTE:The following step applies only when the library is powered on for the first time or
when a new interface controller is installed. This step is necessary to put the interface controller
into managed mode.
28Using the library
3.If this is the first time the library has been powered on after delivery, or if a new interface
controller was installed, configure the interface controller so that it is recognized by the Interface
Manager card. Do one of the following:
•If your library has an e2400-FC 2Gb interface controller, wait approximately two minutes,
and turn off the main power switch. Wait several seconds and then turn on the power
switch again.
•If your library has an e2400-FC 4Gb interface controller, reset the interface controller
twice. To reset the interface controller, insert a paper clip into the reset hole. After resetting
the interface controller, wait three minutes, then reset it again.
NOTE:A 71e library requires approximately 15 minutes to initialize. All other library models
require up to an hour to initialize and do an inventory. Nothing appears on the OCP for the
first few minutes of this process.
Powering off the library
1.Use your backup software to stop all library activity and make sure the picker is empty.
2.On the OCP, select the Operations→Unlock Door command to park the robot.
3.After the robot is parked, press the main power switch ((page 28)) to the O (Off) position.
Center-door interlock
The center door on the front of the library cannot be opened until a password-protected command
to unlock the center door is selected on the OCP. This command parks the robot, and actuates a
lever that enables you to open the center door. Even if the unit is powered off, the robot must be
parked before you can open the center door. If the robot is not parked prior to removing power,
you cannot readily open the center door.
Performing an inventory
The library does an inventory at three different times:
•When you turn on the power to the library
•When you reboot the library (Operations→Reboot Library)
•When you open and close the center door of the library (Operations→Unlock Door )
During the inventory:
•The library robotics controller applies voltage to the motors (picker, reach, wrist, and lift drive)
to obtain range of motion for each motor.
•The range of motion of the robot is tested.
•The targets and labels are read for calibration purposes.
•The barcode scanner looks at each slot to see if it contains a tape. The library robotics controller
stores this information. You must configure the library to use or not use barcode labels
(Configuration→Library Configuration→Configure Inventory Mode). If barcode labels are not
used, the inventory time may take as long as an hour, and a tape cartridge in a slot is only
known to the library as being full.
Attaching barcode labels to tape cartridges
Attaching barcode labels enables the library and application software to identify the tape cartridge
quickly, thereby speeding up inventory time. When a barcode label is not used, the library simply
designates that tape slot as being full. Even though the library functions without barcode labels,
Powering off the library29
HP recommends that you use them on your tape cartridges. Your host software can use barcode
labels to track the following information:
•Date of format or initialization
•Media pool of tape
•Data residing on the tape
•Age of the backup
•Errors encountered while using the tape (to determine if the tape is faulty)
CAUTION:Handle tape cartridges with care. Do not drop or mishandle them, or place them
near sources of electromagnetic interference. Rough handling can damage the tape cartridge
making it unusable and potentially hazardous to the tape drives.
CAUTION:The misuse of barcode technology can result in backup and restore failures. To ensure
that your barcodes meet HP's quality standards, always purchase them from an approved supplier
and never print barcode labels yourself. For more information, see the order form provided with
the library, as well as the Barcode Label Requirements, Compatibility and Usage white paper
available from http://www.hp.com/support.
NOTE:For information on ordering tape cartridges and barcode labels, see “Ordering HP tape
cartridges and barcode label packs” (page 102).
Ultrium tape cartridges have a recessed area located on the face of the tape cartridge next to the
write-protect switch. Use this area for attaching the adhesive-backed barcode label. Only apply
labels onto the tape cartridge in this designated area. For successful operation of your tape library,
place the barcode label entirely within the recessed area, making sure that no part of the label
extends outside.
Figure 26 Proper barcode label placement
Position the barcode label as shown in the following figure, with the alphanumeric portion facing
the hub side of the tape cartridge (LTO2) or numeric portion away from the hub (LTO3 and later).
Never apply multiple labels onto a tape cartridge, because extra labels can cause the tape cartridge
to jam inside a tape drive.
Always use the proper barcode labels for your tape drive technology. An L2 (Ultrium 460), L3
(Ultrium 960), L4 (Ultrium 1840), or L5 (Ultrium 3280), L6 (Ultrium 6650) identifier is located at
the end of the 8-character Ultrium barcode labels on data cartridges. The universal LTO cleaning
cartridges have a CLN and L1 identifier on the label.
30Using the library
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