Companies have been utilizing tape to again up their information because the early days of computing. Tape has its limitations, but it surely was less expensive than the alternatives, so its use continued.

Right now, the scenario is changing. The value of disk storage has come down dramatically and the efficiency, longevity and use characteristics of disk are far superior to tape. Because of this, many companies wish to transfer away from tape for his or her backup and disaster recovery needs.

The important thing necessities of a really perfect backup scheme are:

¢ It have to be economical. Giant quantities of information should be accommodated (due to the must preserve a number of versions of the information), however in many instances the info will never be accessed. Its contribution to the corporates bottom line only comes if the info is required, otherwise, it is an unnecessary expense.

¢ It have to be reliable over the long term. Some information have to be stored for long durations of time, maybe decades in some situations, to satisfy regulatory and business needs. If that information is ever needed it have to be readable and accessible. When tape sits unused for an extended interval, it will get brittle and is susceptible to breaking and information loss.

¢ It have to be fast and straightforward to arrange and operate. Again-up windows are getting tighter as the hours of operation improve and the quantity of knowledge continues to grow. In consequence, the pace of the backup is critically important. If the backup course of could be automated, human errors and prices are reduced.

¢ Restoring information, both particular person information or a complete system, have to be fast, straightforward and reliable. Today, it could take a very long time to retrieve tapes from their offsite storage. Knowledge on tape is stored sequentially so entry to specific information can be cumbersome. Studying the tapes could be problematic if the tape is outdated, brittle or distorted. All this uses valuable IT resources that will be higher spent elsewhere. Disk storage has none of those issues.

The NAS Strategy

With costs within the $2 per GB vary, Network Hooked up Storage (NAS) techniques are quickly changing into the perfect, cost-efficient again-up solution.

¢ Disk-to-Disk information switch speeds far exceed these of writing to tape, so extra information could be backed up in much less time.

¢ Disk storage has better longevity than tape, so the data is going to be there and accessible while you need it.

¢ Random entry to information on disk saves time when making an attempt to revive specific files.

¢ NAS devices are impartial, full techniques that join on to your network so they dont affect your other systems.

¢ Tape rotation schemes are doable with disk-primarily based techniques and complex ones can eliminate duplicate information for extra compact storage.

¢ For smaller quantities of information, detachable disk drives mounted in scorching-swap enclosures can present a aggressive various for offsite information storage.

¢ Finding a NAS system in another workplace and backing it up over the network supplies a fast, automated remote backup. Within the occasion of a disaster, the backup system is instantly able to step in for rapid recovery and business continuity.

Many companies are implementing a staged strategy, the place an onsite NAS supplies fast backups and restores for servers and workstations. Then, to arrange for a disaster that destroys or prevents entry to the first administrative center, the data is robotically replicated to a second NAS at another location. For quickly changing and extremely important information, the on-web site and off-web site techniques will be set as much as mirror one another, in order that little or no information is lost if disaster should strike.

There are other reasons for deploying a NAS system. By carrying out a number of goals, the NAS could be even easier to justify. Examples include:

¢ Additional finish consumer storage. Centralized storage is less complicated to again up than information stored on many finish consumer systems.

¢ Superb for central repositories for workgroup or departmental information that have to be shared.

¢ Regulation compliance, similar to e-mail retention necessities for HIPAA or Sarbannes-Oxley.

Even if you decide to not abandon tape backup fully, you can use a NAS as a rapid staging server to collect the info from other techniques shortly throughout your backup window. Then let the NAS feed the info to the tape unit with out worrying about time constraints. That is referred to as disk-to-disk-to-tape backup.

Network Connected Storage techniques are shortly changing into the popular information sharing, management and backup answer for enterprise functions and database environments.

If you need any more information on nas network attached storage please see the author’s site.

Mike J Weggman

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