Action
If a particular path is preferred, load the HBA for that path in the lower numbered hardware location.
A host in a multi-initiator environment does not discover a
path to the library controller
Symptom
A host in a multi-initiator environment does not discover a path to the library controller when it is booted or
the devices are rescanned when another initiator is using the library.
Cause
Some applications create an exclusive connection to the tape library and prevent drivers from performing
proper discovery and binding. In multihost environments, device discovery on a newly introduced or
rebooted host can be problematic if the library is not idle during the discovery. This issue is not unique to
the advanced path failover drivers and can occur in environments not using the advanced path failover
drivers as well. (Windows and Linux)
Action
1.
For Windows, reboot or rescan devices while the library is not being used.
2.
For Linux, reboot or remove and reinsert the advanced failover drivers using
modprobe
while the library is not being used.
Tape library access commands fail with "Reservation
Conflict" errors or "Medium Removal Prevented" errors
Symptom
In rare cases, it is possible to have a reservation or prevention setting that is no longer associated with a
host. These rare cases include:
• Access to all paths on the active control path drive is lost at the same time that a reservation or
prevent media removal setting is in the process of being changed
• All paths are lost to an active control path drive in a multi-initiator environment and one host does not
recover from the path failure
Cause
A failure of the active control path drive and activation of the passive control path drive near the same
time that a reservation is being released can result in the reservation not being released correctly. This
issue is not unique to the advanced path failover driver and is most likely to occur in traditional multipath
configurations.
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A host in a multi-initiator environment does not discover a path to the library controller
