| This article mainly related with storage backup and | | | | Serial Advanced Technology Attachment is |
| recovery. It describes what are all the hardware's | | | | commonly known as SATA. It is the very common |
| used in the storage backup and recovery | | | | hard disk interface used in all personal systems. One |
| technologies. So many hardware components used in | | | | SATA port permits one device to connect to it. |
| the Storage Backup areas. It is not the article to | | | | SAS |
| bring out the functions of that hardware parts. It | | | | It means Serial Attached SCSI. The name itself tells, |
| gives the information and related technical details of | | | | it can be seen as a merged SCSI and SATA |
| that hardware used in the storage backup and | | | | interface. It has various data transfer rates like 185, |
| recovery technology. | | | | 374, 750, and 1,500 MB/s. SATA devices can connect |
| There are three main important hardware's are used | | | | to SAS but SAS devices can't connect with SATA |
| in the storage backup and recovery technology. | | | | ports. It is specifically designed for the high-end |
| They are Server, Subsystems and Switches. Each | | | | servers. SAS offers the best of SCSI and SATA. |
| one has its own hardware parts. Let's see the | | | | FC |
| information and technical details of this hardware | | | | Fibre Channel has a main advantage of its length. It |
| parts. | | | | works the same like SATA, but it can covers the |
| Server - Master Server | | | | distance up to 2kms (Example: Single Mode Fibre). FC |
| The Master server performs all Backup administrative | | | | offers speeds of 100, 200, and 400 MB/s.iSCSI |
| functions and controls the backup scheduling for each | | | | Internet SCSI is shortly known as iSCSI. It is normally |
| media server. The requirements needed for Master | | | | used in all LANs. It is Low-cost alternative to FC. |
| Server,o Processorso Memoryo I/O Connectivityo | | | | Easier to manage because it uses the common TCP |
| Operating Systemo Backup Software | | | | IP protocol and common Ethernet switches. |
| Media Server | | | | AoE |
| The media server performs the backup operations | | | | ATA over Ethernet. It is a very low cost alternative |
| under the direction of the master, with all backup | | | | to iSCSI. It encapsulates ATA commands into |
| data stored locally on the media server and its | | | | low-level Ethernet frames and avoids using TCP/IP. A |
| respective storage devices. The same above Master | | | | lot of add-on initiator/target software will support |
| Server requirements are applicable to Media Server | | | | both iSCSI and AoE. |
| also. | | | | Ethernet Switches |
| DAS, SAN, NAS Storage Subsystems | | | | A switch is something that is used to turn on or off |
| Direct attached storage (DAS), storage area | | | | various electronic devices. However, in computer |
| network (SAN), and network-attached storage (NAS) | | | | networking, a switch is used to connect multiple |
| are the three basic types of storage subsystems | | | | computers with each other. Since it is an external |
| used in Storage backup hardware management. DAS | | | | device it becomes part of the hardware peripherals |
| is the basic building block in a storage system, and it | | | | used in the operation of storage backup and |
| can be employed directly or indirectly when used | | | | recovery. This connection has done within an existing |
| inside SAN and NAS systems. NAS is the highest | | | | Local Area network (LAN) only and is identical to an |
| layer of storage and can be built on top of a SAN or | | | | Ethernet hub in terms of appearance except with |
| DAS storage system. SAN is somewhere between a | | | | more intelligence. These switches not only receive |
| DAS and a NAS. | | | | data packets, but also have the ability to inspect |
| Hardware used in the Storage subsystem - SCSI | | | | them before passing them on to the next computer. |
| It is abbreviated like Small Computer System | | | | That is, they can figure out the source, the contents |
| Interface. It is the famous storage subsystem | | | | of the data, and identify the destination as well. |
| component used in all medium and small level | | | | Because of this uniqueness; it sends the data to the |
| computer interfaces. A mechanism called 'Cable | | | | relevant connected system only, thereby using less |
| Sharing' used here. It can support the data transfer | | | | bandwidth at high performance rates. Ethernet |
| rate up to 320 MB/s. | | | | switches were used to provide connections and link |
| PATA | | | | aggregation between the backup clients, media |
| Parallel Advanced technology Attachment is shortly | | | | servers, and master server using network speeds of |
| named as PATA. It can support data transfer up to | | | | 100 Mb/sec, 1 Gb/sec, and 10 Gb/sec. |
| 133 MB/s. Nowadays SATA replaces this PATA in all | | | | SAN Switches |
| areas. But the recent version UDMA133 is used in | | | | SAN switches were used to provide Fibre Channel |
| some subsystems depends upon the customer | | | | connections between the Backup media servers and |
| requirement. | | | | the tape libraries. The below listed companies are |
| SATA | | | | working with SAN switches worldwide. |