Path failover is a combination of two previous features: Control Path failover (key that is entered at the
library user interface) and Data Path failover (key that is entered at the device driver interface). A single
activation key that is entered at the library user interface now activates both features unless the LTO 3
drive firmware level is equal to or lower than 73P5 or the library firmware is equal to or lower than 1.95.
For either or both of the two cases, the device driver interface Data Path failover key activation is still
required. For library firmware levels below 8.xx the Path failover feature is available for select LTO 4 tape
drives, and Path failover is not supported for half height drives. For information on minimum firmware
levels for path failover, see “Minimum firmware levels for common library features” on page v.
Service menu
The 2U/4U library is always online, except for when the user enters the Service Library area. A warning
message displays stating that the library must be taken offline from the host before any Service functions
are completed. It is up to the operator to ensure that it is taken offline by phoning the host operator or
other means of communication. Before any service functions are completed, ensure that the host is not
processing any data writing or retrieval.
The Service menu contains the following items:
v Library Verify - an overall library diagnostic procedure
v Run Tests - other library diagnostic tests
v Service - diagnostics and procedures for servicing the drive
v Display Contrast - setting the display from light to dark
v Telnet Service Port
Service: Library Verify
Library Verify is an overall diagnostic test that exercises all library components. To run the Library Verify
test, complete the following procedure.
1. On the Operator Control Panel, navigate to Service > Library Verify and start the diagnostic test.
v Push Select to highlight the drive field. Use the Up/Down keys to select the drive. Push the Select
key to complete the selection.
v Push Down to highlight <Run>.
v Push Select to run Library Verify.
2. When prompted by the Operator Control Panel display and the I/O station opens, insert a blank or
scratch data cartridge.
Configure
PathFailover
a77ug119
Figure 83. Configure: Path failover
Service
LibraryVerify
a77ug047
Figure 84. Service: Library Verify menu
108 IBM TS3100 Tape Library and TS3200 Tape Library: Setup, Operator, and Service Guide Machine Type 3573
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