IBM upgrades blade servers SAN FRANCISCO - IBM Corp. will soon begin shipping upgraded models of its HS20 and JS20 blade servers, including a new SCSI (small computer system interface) option for the HS20 that will double the number of SCSI blades that users can fit into a single chassis, the company announced Friday. The Armonk, New York, computer maker also announced new management software for the servers designed to make them cooler and easier to manage. 

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