WESTLAKE VILLAGE, Calif.--(BUSINESS WIRE)--Qualstar Corporation (NASDAQ: QBAK), a leading manufacturer of data storage solutions and high efficiency power supplies, today announced the release of Q48, a compact 48-slot LTO Tape Library designed for small and medium businesses, and for distributed deployment environments. The Qualstar Q48 is designed to provide superior performance and value for backup, recovery and archiving applications. Feature-rich and compact in a 4U high, 19-inch rackmount