direct attached storage

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direct attached storage

Disk drives contained within the computer cabinet and connected to the CPU via PCI or some other peripheral bus. Most users' computers and most servers have direct attached storage (DAS). Contrast with "storage area network" (SAN), which extends direct attached storage to external disk arrays shared by many servers. Also contrast with "network attached storage" (NAS), which adds file storage on the network. See block level, SAN, NAS and RAID.


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The ATTO family of host adapters includes both SCSI host adapters for direct-attached storage and Fibre Channel adapters for networked and direct-attached storage.
Most SMBs rely on basic internal server disks or direct-attached storage for storing data.
This "full failover" capability, previously the exclusive domain of Fibre Channel SANs, will positively enhance the reliability of entry-level direct-attached storage (DAS) architectures.
One reason for this explosive growth is that iSCSI SANs provide more flexibility than direct-attached storage (DAS) at a lower infrastructure cost than Fibre Channel SANs, by enabling enterprise applications such as e-mail, databases, and remote disk/tape backup to move data over TCP/IP networks.
In the past, customers might have met these needs by adding more direct-attached storage to individual servers.
For most, they resist the call and remain with direct-attached storage or multiple homogeneous SAN islands, Unfortunately, they do not achieve any of the benefits outlined above.
Although direct-attached storage (DAS) continues to dominate, the total number of SMBs in the U.

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