Using Silicon File Systems
System Administration Manual
163
1.
Click
details
to access the details page for the relevant file system.
2.
Click
recover
. This will initiate the file system recovery. Refresh the page and refer to the
file system Status to check the progress of the recovery operation.
3.
If this does not recover the file system, choose from the following options:
•
If the file system is part of a cluster, migrate the EVS to which the file system is
bound to the other Cluster Node. Then, re-issue the recover request. This is
sometimes necessary if only the partner node in the cluster has the current
available data in NVRAM necessary to replay write transactions to the file system
following the last checkpoint. For more details on migrating EVS, refer to
Migrating an EVS between Cluster Nodes
.
•
If the first option fails, or if the contents of NVRAM are not required, then check
Force Recovery
, and then click
recover
to execute a file system recovery
without replaying the contents of NVRAM.
Caution:
Issuing a forced file system recovery will discard the contents of
NVRAM, data which may have already been acknowledged to the client.
Forced Recovery should only be done at the recommendation of BlueArc
Global Services.
WORM File Systems
Titan supports Write Once Read Many (WORM) file systems. WORM file systems are widely used
to store crucial company data in an unalterable state for a specific duration. WORM file systems
can be used to ensure that a company’s data retention policies comply with government
regulations.
Note:
A license is required to use WORM file systems. Contact BlueArc to
purchase a WORM license.
WORM Characteristics
Network clients can access files on a WORM file system in the same way they access other files.
But once marked as WORM, that particular file is "locked down". WORM files cannot be
modified, renamed, deleted, or have their permissions or ownership changed. These restrictions
apply to all users including the owner, Domain Administrators, and ‘root’. Once marked, a file
remains a WORM file until its retention date has elapsed. Files not marked as WORM can be
accessed and used just as any normal file.
Titan supports two types of WORM file systems: lax and strict.