What Does Direct Attached Storage (DAS) Mean?Direct Attached Storage (DAS) is a dedicated digital storage device attached directly to a server or PC via a cable. Advanced Technology Attachment (ATA), Serial Advanced Technology Attachment (SATA), eSATA, Small Computer System Interface (SCSI), Serial Attached SCSI (SAS), and Fibre Channel are the main protocols used for DAS connections.
The DAS principle is fundamentally straightforward. DAS systems have become more prevalent due to increasing requirements for efficient IT storage solutions. The difference between DAS and Network Attached Storage (NAS) is that a DAS device connects directly to a server without a network connection.
DAS creates data islands, because data cannot be shared with other servers.