What you will learn from this tip: When to skip new, higher-priced technologies and stick with tape.

Tape is still the major medium for backup, disaster

Requires Free Membership to View

recovery and archival storage. Growing choices and shrinking costs between competing products mean that storage administrators need to consider their options when designing a backup architecture.

Here are some of the situations where tape is a strong contender:

You have adequate time for backups.
One of the biggest problems with tape is that it is slow. This is less important if your backup window isn't closing down on you. Options like disk-to-disk-to-tape are one way to stabilize the window and still get the advantages of tape.

Quick recovery of files and directories isn't needed or can be handled by other means.
Any block-based storage system (which usually includes tape) is not ideal for getting individual files back quickly. That doesn't matter in some applications. In others, the need can be, alternates such as point-in-time snapshots or mirroring can be used to meet that need.

You need to store data offline in large chunks.
The latest generation of SDLT tapes can store up to 600 GB (compressed) on a single tape and Quantum is expected to introduce DLT-S4 tapes with 1.6 TB capacity (compressed) in the near future. This puts tape capacities well ahead of other removable data storage media.

You need long-life archival storage of large quantities of information.
Increasingly, enterprises are realizing there are differences between archival and backup storage. While tape is increasingly being challenged in the backup arena, it still excels at archival storage. Properly stored, tape has an expected life of at least 20 years.

You need off-site archival storage of large quantities of information.
Tapes are high capacity and portable. If your disaster recovery plan calls for moving data offsite for long term storage, the economics of tape are just about unbeatable.

You need a low-cost solution.
This isn't the no-brainer it once was, but tape is one of the cheapest ways to go for most backup and disaster recovery applications.

Finally, keep in mind that you have options. Tape is no longer the only choice for most of these jobs and you need to weigh the costs and other tradeoffs before settling on a storage medium.

For more information:

Tip: Tape prices are going up -- What will it mean to you?

Tip: Seven ways to minimize tape failure

Tip: The dirt on WORM tape

About the author: Rick Cook has been writing about mass storage since the days when the term meant an 80 K floppy disk. The computers he learned on used ferrite cores and magnetic drums. For the last twenty years he has been a freelance writer specializing in storage and other computer issues.

This was first published in February 2005

There are Comments. Add yours.

TIP: Want to include a code block in your comment? Use <pre> or <code> tags around the desired text. Ex: <code>insert code</code>

REGISTER or login:

Forgot Password?
By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy
Sort by: OldestNewest

Forgot Password?

No problem! Submit your e-mail address below. We'll send you an email containing your password.

Your password has been sent to:

Disclaimer: Our Tips Exchange is a forum for you to share technical advice and expertise with your peers and to learn from other enterprise IT professionals. TechTarget provides the infrastructure to facilitate this sharing of information. However, we cannot guarantee the accuracy or validity of the material submitted. You agree that your use of the Ask The Expert services and your reliance on any questions, answers, information or other materials received through this Web site is at your own risk.