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DAS is Direct Attached Storage, as the name suggests, the Storage devices such as Hard drive,Tape drive, Tape Library, JBOD/Enclosure, Storage arrays are directly connected to the Server or Host systems.The simplest example of DAS is the internal hard drive of a server computer.
DAS environment can have one or multiple servers and associated Storage devices. hence Storage resources are dedicated to specific servers and cannot be shared.
in DAS, the main interfaces are Drive-side interfaces & Host-side interfaces and underlying interface technologies are ATA/IDE, SATA, SCSI, SAS and Fiber Channel.
Advantages:
Simple to design & Implement and good option for very small to medium business companies.
Disadvantages:
Direct-attached storage can be more expensive to manage because you cannot redeploy unused capacity, which results in underutilization.
• Having storage distributed throughout the organization makes it difficult to get a consolidated view of storage across the organization.
• Disaster recovery scenarios are limited because a disaster will cause both server and storage outages.
• For data backup and recovery, you need to choose whether to attach local backup devices to each server, install dual network adapters in each server and back up the data over a separate LAN, or back up the server over the corporate LAN.
Large organizations have found that placing stand-alone tape drives in individual servers can quickly become expensive and difficult to manage, especially when the number of servers in the organization grows into the hundreds.
In this situation, it is often best to back up servers over a network to a storage library, which offers backup consolidation and eases management.
For expert consultation contact Mail ID: storagetrendz@gmail.com
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