The rise of Network Attached Storage and the reasons why NAS is replacing tape as the medium of choice for backup and disaster recovery
Laptop Battery Businesses have been using tape to back up their data since the early days of computing. Tape has its limitations, but it was much cheaper than the alternatives, so its use continued.
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Thinkpad Today, the situation is changing. The price of disk storage has come down dramatically and the performance, longevity and use characteristics of disk are far superior to tape. As a result, many businesses are looking to move away from tape for their backup and disaster recovery needs.
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Microsoft The key requirements of an ideal backup scheme are:
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Laptop Computers . It must be economical. Large amounts of data need to be accommodated (due to the need to keep multiple versions of the data), but in many cases the data will never be accessed. Its contribution to the company's bottom line only comes if the data is needed, otherwise, it is an unnecessary expense.
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Laptop Computer . It must be reliable over the long term. Some data must be stored for long periods of time, perhaps decades in some situations, to meet regulatory and business needs. If that data is ever needed it must be readable and accessible. When tape sits unused for a long period, it gets brittle and is prone to breaking and data loss.
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Desktop Computer . It must be quick and easy to set up and operate. Back-up windows are getting tighter as the hours of operation increase and the amount of data continues to grow. As a result, the speed of the backup is critically important. If the backup process can be automated, human errors and costs are reduced.
Notebooks . Restoring data, either individual files or a whole system, must be quick, easy and reliable. Today, it can take a long time to retrieve tapes from their offsite storage. Data on tape is stored sequentially so access to specific records can be cumbersome. Reading the tapes can be problematic if the tape is old, brittle or distorted. All this uses precious IT resources that would be better spent elsewhere. Disk storage has none of these issues.
Lenovo The NAS Approach
Hard Drive With prices in the $2 per GB range, Network Attached Storage (NAS) systems are rapidly becoming the ideal, cost-effective back-up solution.
Travelstar . Disk-to-Disk data transfer speeds far exceed those of writing to tape, so more data can be backed up in less time.
Gateway . Disk storage has greater longevity than tape, so the data is going to be there and accessible when you need it.
Laptop Parts . Random access to data on disk saves time when trying to restore specific files.
Software . NAS devices are independent, complete systems that connect directly to your network so they don't impact your other systems.
Hard Drives . Tape rotation schemes are possible with disk-based systems and sophisticated ones can eliminate duplicate files for more compact storage.
Electronics . For smaller amounts of data, removable disk drives mounted in hot-swap enclosures can provide a competitive alternative for offsite data storage.
Canon . Locating a NAS system in another office and backing it up over the network provides a fast, automated remote backup. In the event of a disaster, the backup system is immediately ready to step in for rapid recovery and business continuity.
Desktop Pc Many businesses are implementing a staged approach, where an onsite NAS provides fast backups and restores for servers and workstations. Then, to prepare for a disaster that destroys or prevents access to the primary place of business, the data is automatically replicated to a second NAS at another location. For rapidly changing and highly important data, the on-site and off-site systems can be set up to mirror each other, so that little or no data is lost if disaster should strike.
Desktop Computers There are other reasons for deploying a NAS system. By accomplishing multiple goals, the NAS can be even easier to justify. Examples include:
Think Pad . Additional end user storage. Centralized storage is easier to back up than data stored on many end user systems.
Repair . Ideal for central repositories for workgroup or departmental data that must be shared.
Data Recovery . Regulation compliance, such as email retention requirements for HIPAA or Sarbannes-Oxley.
Cisco Even if you decide not to abandon tape backup entirely, you can use a NAS as a rapid staging server to gather the data from other systems quickly during your backup window. Then let the NAS feed the data to the tape unit without worrying about time constraints. This is referred to as disk-to-disk-to-tape backup.
Keyboard Network Attached Storage systems are quickly becoming the preferred data sharing, management and backup solution for enterprise applications and database environments.
Monitor About The Author
Desktop Mark Allen is the head of Sales & Marketing for PrimeArray SystemsT, Inc. - Network Attached Storage Solutions For Your Business
Infosys PrimeArray's advanced line Network Attach Storage (NAS) arrays, or its combined NAS and CD/DVD Servers, provide economical, easy to use yet robust options for data storage and back up.
