HP StoreEver MSL6480 Tape Library User Manual
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Contents
Traditional library control path and drive connections without failover..............................................7
Basic path failover....................................................................................................................8
Basic data path port failover details.......................................................................................8
Basic control path failover details...........................................................................................9
Technology for basic control path failover.............................................................................11
Driver operation during device open.....................................................................................12
Opening a connection to a library control path.....................................................................12
Driver operation during normal communications.....................................................................13
Path failure detection..........................................................................................................13
Path failure recovery...........................................................................................................13
Active and passive control path drives..................................................................................13
Library controller path failure recovery..................................................................................14
2 Enabling basic path failover......................................................................15
3 Installing advanced path failover................................................................16
Preparing the library...............................................................................................................16
Preparing the host...................................................................................................................17
4 Preparing the switches and hosts for failover................................................18
Brocade switches...............................................................................................................18
Cisco switches...................................................................................................................19
5 Configuring failover for the HP StoreEver ESL G3 Tape Libraries......................20
Enabling data path failover.................................................................................................20
Verifying data path failover.................................................................................................21
Diagnosing basic data path failover.....................................................................................22
Disabling data path failover................................................................................................23
Enabling control path failover..............................................................................................24
Configuration requirements after enabling control path failure..................................................25
6 Configuring failover for HP StoreEver MSL6840 Tape Libraries.......................27
Enabling control path failover..............................................................................................27
Configuration requirements after enabling basic control path failure.........................................28
Verifying control path failover..............................................................................................28
Contents
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