DAS storage technology in the enterprise is how the specific application – serve
We all know, enterprise data backup storage with DAS, NAS and SAN and other ways, but many small and medium enterprise data backup method still uses a DAS. As the company's server in the geographical distribution is very dispersed, and SAN (storage area network) or NAS (Network Direct store) the interconnection between them is very difficult; storage system must be connected directly to the application server,; many database applications and application servers, including applications, they need to connect directly to the memory on, like a number of groupware applications and email services. So far, so enterprises must use the DAS backup storage.
Small amount of early enterprise data, the purchase of the server may be internal / external SCSI interface with a tape drive (or tape drive), this server is mainly used in UNIX (Solaris, AIX or HPUNIX) environment, use of SUN, IBM or HP and other vendors of servers, data backup and recovery mainly rely on tape to complete, then the maximum data storage capacity of 1-2G.
In the windows system backup data using an external mobile hard drive capacity up to several hundred G, followed USB and IEEE-1394 interface solutions for mobile hard disk came into being, to use the latest SerialATA (serial) as the mobile hard drive transmission interfaces, theoretical data transfer speed of 1500Mbps, than the current fastest USB2.0, IEEE1394 and even the fastest of many, the use of SATA device hot-swappable SATA mobile hard disk technology to be able to post as the USB / 1394 as use of mobile hard disk (Figure 1).
Hardware-based RAID system is managed independently from the host RAID subsystems, and its main office in each group to show only as a RAID disk array. Hardware raid implementation is divided into two: one is built (or integrated) raid controller, one is an external raid controller. Built-in raid controller card is usually used in the form of pieces of the motherboard plugged into the computer, integrated raid controller is directly controlled by the motherboard manufacturers chip on the motherboard, the recent high-end motherboard raid controller has almost become the standard configuration.
Raid controller and the connection mode according to different, raid controller with different amounts of cache, the cache of course, the more the better performance of the controller, and the price was also more expensive. Software RAID in the operating system to implement various types of RAID levels, because it does not need an expensive RAID controller cards, software RAID offers the cheapest solution. It can also be used in cheaper IDE disks and SCSI disks. Use very fast CPU, software RAID of some of the performance may go beyond the hardware RAID.
JBOD storage areas are also present an important class of storage devices. JBOD can be based on parallel SCSI cable to use direct-attached storage, or in general, in a FibreChannel interface storage networks. Disk drive inserted in an internal bus, the system server and JBOD external bus cable between the simplified single cable connection.
JBOD also supports hot-swappable disk drives, which can not affect the data storage and server operations and increase or replace the disk. Use SCSI disks JBOD, the disk form a closed between the SCSI daisy chain, to provide a parallel SCSI host connectivity. Using FibreChannel disk JBOD can provide 1 ~ 2 FibreChannel interface, the internal ring to form a shared segment.
DAS can also constitute a disk array-based dual-plane high-availability systems to meet the data storage on the high availability requirements. Two co-hosts to connect a disk array, the host through the SCSI interface to connect disk arrays, or in the host installation of fiber optic transmission module, through the optical fiber connected to the disk array. Disk array and the host is connected, you can choose the part of the hard disk as a host of external hard drives, can not be shared.
This method is mainly used for storage
hot standby, the increased stability of the system, some important enterprise data protection in this way is to ensure "absolute safety." Later, with the server and backup software costs down, in LINUX and WINDOWS platform also enables hot standby, and to the realization of this DAS data storage now widespread in the enterprise, is also the DAS in the specific application of enterprise data storage the concentrated expression.
We are high quality suppliers, our products such as Core Drilling Rig , Mud Clarifier manufacturer for oversee buyer. To know more, please visits drilling rigs,drilling equipment.
Processing your request, Please wait....
