Date Added: Aug 2009
Traditional servers today use a variety of data storage solutions, including Direct Attach (DAS), Network Attach (NAS) and Storage Area Network (SAN). Historically, these servers were configured to boot their operating system from an internal storage device (typically a parallel SCSI hard disk). As organizations implement large-scale data centers, with sometimes thousands of servers, they have sought methods to increase efficiencies through exclusive use of shared storage even for booting. In addition, with the dramatic increase in the use of rack-mount and blade servers, there is a particularly acute need to convert to diskless servers and rely completely on shared storage devices.