The use of tape and disk backup storage is that people often use the equipment. But between the two has been used in a separate environment. So what kind of environment, we can speak both be used? People mention data backup, think of the mind is the equivalent word "tape" can be said that along with the backup tape every stage of technological development, Everyone that is established by usage to the "data backup" and "tape" the equal sign. However, with the speed with disk backup, backup window small advantage, tape backup data is no longer the only media choice.
Industry debate on the tape and disk can be considered a long debate, since the ATA disk storage application, a storage industry hot topics. One group of people that the tape will be eliminated, and the disk will be the main backup media. Although there are many arguments in favor of the tape from a tape backup, replace, replaced by a disk backup sample, but the tape backup and archiving system still occupies an integral part. Moreover, especially in the application of virtual tape technology, tape and disk combination can be optimized data protection strategy.
Tape-based backup
As a traditional tape storage media can be described as deep-rooted, the disk moment you want to be completely out of the market, it is not possible to do. Will continue in the enterprise tape backup, recovery and archive strategy plays a central role.
With the disk drive prices down overnight, disk-based storage devices are blossoming out, some said the use of tape has come to dead end. IDC see the tape drive in 2006, the market will continue to be expanded. 100GB or larger drive shipments will increase, and, SDLT, LTO, SAIT drive shipments are growing.
Although the use of disk storage data, the price per GB decreases by more than a tape, but the whole, the present is still the cost of using tape backup data is lower. The distance between tape and disk will still be there, because the tape manufacturers are constantly reducing the cost of tape and improve its performance. In addition, the tape also has a compact, high capacity, low cost, long life and portability advantages. Moreover, the tape backup technology has been 50 years since birth, has withstood the test of time, is indeed a very mature technology, many business users have become accustomed to the use of such storage media, and this is one of its advantages.
The shortcomings of tape-based backup is focused on performance. Less search time and tape media, tape and disk transfer speed is compared, in a slower backup and storage. Unlike disk, tape, media must be controlled.
Tape and disk battle, for now, tape still has many obvious advantages, such as portable nature of tape and the tape will not be the same as the disk head damage problems. Therefore, the tape for those who require long-term archiving of data stored off-line users still have very attractive terms. And the transfer of large amounts of data when the cost of using the tape to be lower than the cost of using the Internet. There is also a fact we must face is that many IT organizations, especially those of large companies IT departments tend to refuse to change their long-term use of those products.
Disk backup
Disk-based backup strategy, one of the most powerful reason for the backup and recovery performance. Disk can access data directly, because no load or rewind, but also do not need to search for the tape volume data files. For the conventional environment, data is stored on disk, the disk read and write data at a rate significantly faster than many tape, storage, data management, it was easier, the time required for the backup window less.
Although the disk is a backup has some advantages, but the disk-based backup strategy has its drawbacks. Some backup applications, adjust according to their backup disk data structure, most of the disk device simulation into a tape device to back up. And a low-cost disk array back up, it can persist up to several weeks of backup data. It can not accommodate a large number of data for long-term retention. Utility will force the organization will eventually remove the backup device to removable media.
In addition, starting from the data security from viruses, hackers, security threats and natural disasters also needs to be considered. Place a site, power or communications infrastructure threats require a copy of the entity's data is stored in a place away from the base site, the fault repair can be used, which would increase the cost of disk backup. For archiving, the disk's life than tape media to be much shorter life span. Idle disk may be lost after one or two years of data or degaussing, except once every 30 days on the turn.
Can have both fish and bear's paw
Comparison of tape and disk on the debate, for tape and disk separately as a data protection strategy are to support and oppose the point of view. The most likely conclusion is reached: while both technologies will increase both with the advantage of both their weaknesses and provide a complementary environment. In addition, virtual tape technology is optimized to improve the two-tier strategy to achieve significant business value with the key.
Tape in the data center data protection strategy for the position has changed. Tape backup strategy will continue as an important part, especially for permanent data storage. Disk will be added as a choice to send the backup and storage functions required 24x7xforever operation. By combining the two technologies will be used for disk and tape backup platform with a short-term, efficient backup and storage, and long-term data archiving have been achieved.
Spectra Logic introduced for a unique, innovative products, namely: RXT Sabre. This technology combines the performance and reliability of disk and tape mobility, filled between the fixed disk and tape the vacancy. Through the perfect combination of disk and tape, RXT enables you to seamlessly and fast disk to existing backup environment: removable RAID disk.
RXT Sabre as part based on the traditional parts? C drive and removable media - RXT Sabre technology can quickly be integrated into standard backup platform and environment, and provide a complete disk - disk - tape (D2D2T) solution. RXT Sabre simulation and because the standard LTO tape drive, RXT Sabre medium is transparent to the backup software. RXT Sabre to provide you with a fixed disk performance and reliability advantages will also have the RAID data storage technology in order to facilitate the data off-line or off-site preservation.
RXT Sabre to help you increase your disk data center without a huge initial investment, no need to change your backup environment or backup strategy, without a new application or server, without much data center space requirements. Simply insert the RXT Sabre and then use it: Store the RXT Sabre media, offline storage, data center of its back once again to use it, it is very easy.
RAID will be moving through to automated tape library, you receive great benefits. Use the same backup strategy and policy, and continue to use the appropriate tape. For example, use tape as a long-term storage of data and inexpensive way to store frequently accessed data to the RXT Sabre, such as the recent and important use of commercial data.
Once RXT Sabre to Spectra T-Series libraries, the data stored in the data center will have two choices: tape and RXT Sabre media. RXT Sabre will be built into the repository, RXT provide near-line access to a recent data backup, disk? C disk ultra-high-speed buffer memory and disk? C tape option. Spectra RXT Sabre technology standard drives and media collection with existing robot can work together. Spectra tape library in a mixed tape and RAID disk, without any merger burden? C do not need new hardware, no new software or changing any infrastructure. RXT Sabre device is inserted to increase the RXT TeraPack medium, and then run. In a storage environment to increase the disk device is so easy.
Large data centers use both automated RXT Sabre as an off-site storage facilities, storage and distribution; for the DtoDtoT lifecycle management solutions, hierarchical data management; or use the RXT Sabre conventional remote office backup (can be used independently, directly and the server connection), RXT will be stored in the environment has been widely used.
All of a sudden there were two backup media, compare two media has great deal of diversity. Also equipped with tape and disk media as data protection and can easily use and management, why not.
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