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. |