3PAR InForm Operating System 2.3.1 Release Notes (320-200178 Rev D, May 2010)

2.4
3PAR InForm Operating System Release Notes InForm OS Version 2.3.1
2.5.2.4 Thin Reclamation for Veritas Storage Foundation
3PAR Thin Reclamation for Veritas Storage Foundation is a new 3PAR software product that
enables 3PAR arrays to use granular file system-level information to autonomically reclaim
unused space within thinly provisioned virtual volumes. Working jointly with Symantec on a
Thin Reclamation API, this functionality allows the host file system to communicate the
location of free blocks to the storage array as file deletions happen, thus maintaining high
capacity utilization without impacting host applications. Thin Reclamation for Veritas Storage
Foundation is included with Thin Persistence.
2.5.3 Resiliency to Protect Against Hardware, Software, and Site Failures
2.5.3.1 Synchronous Long Distance Remote Copy
Synchronous Long Distance Remote Copy provides a zero data-loss, three-site disaster recovery
capability for InServ Storage Servers. This is accomplished by allowing concurrent asynchronous
replication over IP (or FCIP) to a long distance disaster recovery site, together with synchronous
replication over FC to a closer synchronous site. This feature currently requires a minimum of
four nodes on the InServ Storage Servers across all three-sites. Synchronous Long Distance
Remote Copy is available as a part of Remote Copy.
2.5.3.2 Additional Remote Copy Enhancements
■ 2.2.3 MU4 & 2.2.3 MU5 can be upgraded to 2.3.1 GA for systems using Remote Copy.
Remote Copy Groups must still be stopped, however Remote Copy does not. Remote Copy
groups may be stopped using the SP Script, an external script, or by stopping each group
individually using the InForm CLI. All InServs with Remote Copy connections to the InServ
running 2.3.1 must be upgraded to 2.3.1 within 30 days.
■ Synchronous Long Distance Remote Copy on two node systems is supported in T-Class and
F-Class systems. The asynchronous periodic link must be Remote Copy over IP.
■ Two node T-Class and F-Class secondary systems in N-to-1 (specifically, 2-to-1) Remote Copy
setups using Remote Copy over IP is now supported.
■ Ability to grow Remote Copy volumes in a Remote Copy Group without removing the
volume from the Remote Copy Group, and thus avoiding a full synchronization.
■ Ability to rename volumes in a Remote Copy Group.