EMC’s Celerra documentation claims support of oplocks, but makes no mention of UNIX/NFS interoperability. They recommend turning oplocks off when “handling critical data with the need to avoid even slight data loss”, which implies that they do not interoperate with UNIX/NFS. CIFS/9000 has a planned enhancement scheduled to provide UNIX, UNIX/NFS, and PC-NFS oplock support.

Empirical data will be added when test equipment becomes available.

HP Sales Force personnel report that customers have been informed by EMC that Celerra provides comprehensive cross-platform locking, including:

Byte Range

Mandatory Share Mode (Open Mode)

Non-Locking NFS client13

Please read Chapter 3 and Appendix B.

13See Appendix B.5

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HP UX Common Internet File System (CIFS) Client/Server Software manual