Difference Between DAS and SAN
1. Directly Attached Storage (DAS) :
The storage device which is permanently attached to a desktop computer. DAS is for a single user (Hard drive attached to a computer). It is well suited for a small-to-medium sized business where sufficient amounts of storage can be configured at a low startup cost. The DAS enclosure will be a separate adjacent cabinet that contains additional disk drives.
Component of Directly Attached Storage (DAS) –
1. Storage devices
2. Cables
3. Disk Array
4. Protocol
5. Storage protocols: ATA, SCSI, SAS, SASA, FC
2. Storage Area Network (SAN) :
SAN acts on block level over network. Storage which can be accessed using ISCSI or FC. Suitable for business-critical applications and where high performance is required. The main benefit to a SAN-based storage solution is ability to share storage arrays to multiple servers. This allows you to configure storage capacity as needed, usually by a dedicated SAN administrator. Higher levels of performance throughput are typical in a SAN environment, and data is highly available through redundant disk controllers and drives.
Components of Storage Area Network (SAN) –
1. Node ports
2. Cables
3. Interconnect device such as: Hubs, switches, directors
4. Storage arrays
5. SAN management Software
Difference Between DAS and SAN :
SR.NO |
DAS |
SAN |
1. |
DAS stands for Direct Access Storage. |
SAN stands for Storage Area Network. |
2. |
For backups and recovery, Sectors are used. |
For backups and recovery, Block by block copying technique is used. |
3. |
It is easy to install. |
It is difficult to install. |
4. |
It is not complex. |
It is complex. |
5. |
It is less expensive |
It is more expensive. |
6. |
For data transmission, IDE/SCSI is used. |
For data transmission, Fiber Channel, IP is used. |
7. |
Its capacity in bytes is 10^9. |
Its capacity in bytes is greater than 10^12. |
8. |
It does not allow to share files at different operating system. |
It allows to share files at different operating system. |
Last Updated :
23 Jun, 2020
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