IBM Storwize V7000, Problem Determination Manual

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Before using the block volumes that are accessed by the SAN or with iSCSI,
perform the following tasks:
v
Start the block host systems.
v
Manual actions might be necessary on the hosts to trigger them to rescan for
devices. You can perform this task by disconnecting and reconnecting the Fibre
Channel cables to each host bus adapter (HBA) port.
v
Verify that all mapped volumes can be accessed by the hosts.
v Run file system consistency checks on the block hosts.
v
Run the application consistency checks.
Before using the file volumes that are used by GPFS on the file modules to provide
Network Attached Storage (NAS), perform the following task:
v
Contact IBM support for assistance with recovering the GPFS quorum state so
that access to files as NAS can be restored.
Backing up and restoring the system configuration
You can back up and restore the configuration data for the system after
preliminary tasks are completed.
Configuration data for the system provides information about your block system
and the objects that are defined in it. The backup and restore functions of the
svcconfig
command can back up and restore only your configuration data for the
Storwize V7000 system. You must regularly back up your file systems and your
application data by using the appropriate backup methods.
You can maintain your configuration data for the system by completing the
following tasks:
v
Backing up the configuration data
v
Restoring the configuration data
v Deleting unwanted backup configuration data files
Before you back up your configuration data, the following prerequisites must be
met:
v
No independent operations that change the configuration for the system can be
running while the backup command is running.
v
No object name can begin with an underscore character (_).
Note:
v
The default object names for controllers, I/O groups, and managed disks
(MDisks) do not restore correctly if the ID of the object is different from what is
recorded in the current configuration data file.
v
All other objects with default names are renamed during the restore process. The
new names appear in the format
name _r where name is the name of the object in
your system.
Contact the IBM support center to help you prepare the Storwize V7000 Unified
system to do the restoring of the system configuration on the control enclosure.
The configuration restore procedure is designed to restore the information about
your block storage configuration, such as block volumes, local Metro Mirror
information, local Global Mirror information, storage pools, and nodes. All the data
that is written to the block volumes is not restored.
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Storwize V7000 Unified: Problem Determination Guide Version