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Enabling data path failover.................................................................................................29
Verifying data path failover.................................................................................................30
7 Configuring failover for other HP StoreEver MSL Tape Libraries.......................31
Configuring data path port failover...........................................................................................31
Enabling data path port failover..........................................................................................31
Verifying data path port failover..........................................................................................31
Configuring basic control path failover......................................................................................32
Enabling control path port failover on the library....................................................................32
Configuration requirements after enabling control path failure..................................................34
Verifying basic control path failover......................................................................................34
8 Installing and using Windows advanced path failover drivers.........................35
Installing the Windows advanced path failover drivers.................................................................36
Downloading and installing the drivers.................................................................................36
Uninstalling drivers.............................................................................................................37
Windows driver theory of operation..........................................................................................37
Driver components.............................................................................................................37
Storage bus filter driver..................................................................................................38
Multi-path intermediate class driver..................................................................................39
Device manager view....................................................................................................40
Device firmware.................................................................................................................42
9 Installing and using Linux advanced path failover drivers...............................43
Installing advanced path failover drivers....................................................................................43
Updating the driver without rebooting.......................................................................................43
Device files............................................................................................................................43
Command line user interface....................................................................................................44
Viewing the current driver revision........................................................................................44
Viewing device status.........................................................................................................44
Setting the preferred path....................................................................................................45
Path rotation exercise function..............................................................................................46
Enabling advanced path failover on a device while the driver is running........................................46
Disabling advanced path failover on a device while the driver is running.......................................46
Linux driver theory of operation................................................................................................46
10 Installing and using HP-UX advanced path failover drivers............................48
Installing advanced path failover drivers....................................................................................48
Commands for viewing tape and library devices connected to a system.........................................48
Finding the lockdown path.......................................................................................................51
Troubleshooting advanced path failover.....................................................................................51
Enabling or disabling advanced path failover............................................................................51
11 Troubleshooting failover operation.............................................................53
Locating a failed path.............................................................................................................53
Windows debugging logs and tools..........................................................................................54
Confirming failover operation..............................................................................................54
Windows system log..........................................................................................................55
Diagnostic application........................................................................................................56
Operation....................................................................................................................56
Actions........................................................................................................................57
Diagnostic dumps..............................................................................................................61
Memory dump setup......................................................................................................61
Driver debug dump setup...............................................................................................61
Bug checks...................................................................................................................61
Hangs.........................................................................................................................61
Linux logs and troubleshooting tools..........................................................................................61
4 Contents