System reboot command can cause systems to hang when SCSI-3 Persistent Reservations are used with ISCSI targets.

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Issue:

When a reboot command is issued on a system that is connected to a NetApp target through iSCSI software initiator and where persistent reservations are used, it may become unresponsive and will need to be forcefully shut down.

Environment:

RHEL6.3 and older
SCSI-3 Persistent Reservation environments
Multiple storage arrays

...

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