3PAR InForm® OS 2.3.1 CLI Administrator's Manual (320-200180 Rev B, February 2010)

6.6
Active and Inactive Hosts
3PAR InForm CLI Administrator’s Manual InForm OS Version 2.3.1
6.4 Active and Inactive Hosts
An active host is a host that is connected to an InServ Storage Server port and recognized by
the InForm OS. Under normal operation, an active host may have a number of volumes
exported to it and therefore the host has access to those volumes.
An inactive host is a host that is known to the InForm OS but is not recognized as being
connected to any InServ Storage Server port at the moment. This may be because the host is
currently disconnected from the storage server port, or due to an error condition such as link
failure or because the host is offline.
When a host on an InServ Storage Server port becomes inactive for any reason, the following
happens:
1 The InForm OS recognizes that the host is missing on the port and changes the state of the
host from
active to inactive.
2 The InForm OS remembers all volumes exported to the host before it became
inactive. It
will not unexport the volumes on the port with the missing host.
3 If and when the host reappears on the same port, the InForm OS will change the state of
the host to
active again. At that time, the host will have access to all previously exported
volumes as before.
CAUTION: Ports in the same Fibre Channel adapter should be set to the same
mode.
■ For dual-port LSI cards, both ports must use the same mode.
■ For quad-port LSI cards, each port pair (ports 1&2 and 3&4) must use the same
mode.
■ For QLogic cards, it is strongly recommended that all ports in a card be set to the
same mode.