User's Manual

HP StorageWorks File System Extender Software user guide 149
• while the FSE implementation is fully operational, after the FSE administrator has manually switched
from LAM to FAM using FSE command-line interface.
In Limited Access Mode, FSE users and third-party applications can only browse the HSM file system
directory tree and access files that are still online. They cannot modify existing data, add new directories
and files, or recall offline files. If an application tries to access a file while the HSM file system is operating
in LAM, it receives an error. If LAM is manually set for an HSM file system while all FSE processes are
running, the HSM process continues to trigger migrations, releases and deletions on this HSM file system,
according to the migration, release, and deletion policies that are configured for the appropriate FSE
partition.
In contrast, Full Access Mode does not constrain FSE users in any way. All data movement processes are
enabled and you can use all the features that are generally available for HSM file systems in the FSE
implementation.
NOTE: LAM and FAM are compatible with both regular and WORM FSE partitions. When an HSM file
system is operating in FAM, WORM is fully supported, while when operating in LAM, the LAM restrictions
prevail over the configured WORM policies.
For information on how to switch manually between the HSM file system access modes, see ”Switching the
access mode for an HSM file system” on page 156.
NOTE: For information on how to determine the access mode for a particular HSM file system or
troubleshoot potential problems with disk volume access, see description of the fse command in the FSE
command-line reference.