
Maintaining and Managing the Storage Router
192
IP Storage Router SR2122-2 User Guide
Note:
If some targets are available but others are not, failover of the SCSI routing
instance does not occur.
Each cluster supports up to 12 active SCSI routing instances. Since each storage
router can also support up to 12 SCSI routing instances, high availability is
ensured for each instance in the cluster (regardless of the division of those
instances between storage routers).
Manual Failover
While failover of SCSI routing instances is automatic, there may be times when
you wish to manually move a SCSI routing instance from one storage router to
another. The move may be temporary, after which the instance will be moved back
to its original location. At other times, you may want to move a SCSI routing
instance permanently to another storage router, ensuring that the instance will
continue running on the specified storage router whenever possible.
As an example cluster scenario, a cluster is composed of two storage routers,
StorageRouterSys1
and
StorageRouterSys2
.
StorageRouterSys1
is currently
running instances,
scsi1
and
scsi2
, and is the primary storage router for both
instances.
StorageRouterSys2
is currently running instances,
scsi3
and
scsi4
. The
primary attribute for
scsi3
and
scsi4
is set to the default setting of
none
, indicating
no preferred storage router for failover for either instance.
Failover as Temporary Move
Referring to the example cluster scenario just described, the following procedure
moves the SCSI routing instance,
scsi1
, from its primary, or preferred, storage
router,
StorageRouterSys1
, to the other storage router on a temporary basis. The
commands in this procedure are issued from a CLI session from storage router,
StorageRouterSys1
.
1.
enable
— Enter Administrator mode.
2.
show cluster or show scsirouter
scsi1
stats
—
Verify
that the instance to be moved,
scsi1
, is indeed running on storage router,
StorageRouterSys1
.
3.
failover scsirouter
scsi1
—
Failover SCSI routing instance,
scsi1
.
Содержание StorageWorks SR2122
Страница 110: ...Configuring System Parameters 110 IP Storage Router SR2122 2 User Guide ...
Страница 216: ...Cable and Port Pinouts 216 IP Storage Router SR2122 2 User Guide ...
Страница 224: ...Regulatory Compliance Notices 224 IP Storage Router SR2122 2 User Guide ...
Страница 232: ...Recommended Host Storage Configurations 232 IP Storage Router SR2122 2 User Guide ...
Страница 242: ...Index 242 IP Storage Router SR2122 2 User Guide ...