Just five days after HP announced it would acquire IBRIX, another scale-out NAS provider has been purchased. LSI announced today that it would acquire ONStor for $25 million in cash. The company sold a range of SAN and NAS storage systems, but was best-known for its Bobcat clustered NAS gateways.

EMC (NYSE:EMC) started a gunfight in the storage world today by offering an astonishing $1.8 billion for data deduplication sweetheart, Data Domain (NASDAQ:DDUP). This $30 per share offer one-ups rival NetApp (NASDAQ:NTAP) by $5 per share, which looked to have sealed the deal with a solid $1.5 billion offer on May 20. EMC’s offer is all-cash, while NetApp had mixed cash and stock.

HDS telegraphed that a big announcement was coming today. They even made it fun, with a (literally) cryptic blog entry to make sure we were all watching. But the announcement of High Availability Manager, a software product to manage existing HDS USP-V and USP-VM arrays, underwhelmed. It isn’t HDS’ answer to the EMC Symmetrix V-Max and it’s forthcoming FAST technology.

Windows Storage Server is one of the most interesting products from Redmond, a specialized version of Windows Server with integrated storage target capabilities, including iSCSI, NFS, SMB, and single-instance storage (file-level deduplication). Although Windows Server 2008, with its many storage feature updates, was released last year, the updated version of Windows Storage Server was still under construction until last month. But Windows Storage Server 2008 is available to manufacturers today.