Disk-based protection and recovery, Tape-based backup and archive, See also – Dell PowerVault DP600 User Manual

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Disk-Based Protection and Recovery

One advantage of disk-based data protection is the potential time savings. Disk-based data

protection requires none of the preparation time that tape-based protection does—locating the

specific tape required for a job, loading the tape, positioning the tape to the correct starting point.

The ease of using a disk encourages sending incremental data more frequently, which reduces

the impact on the computer being protected and on network resources.

Data recovery with disk-based data protection is more reliable than that of tape-based systems.

Disk drives typically have a much greater mean time between failure (MTBF) rating than tapes.

Recovery of data from disk is quicker and easier than recovery from tape. Recovering data from

disk is a simple matter of browsing through previous versions of the data on the DPM server and

copying selected versions directly to the protected computer. A typical file recovery from tape

takes hours and can be costly, and administrators in a medium-size data center can usually

expect to perform 10 to 20 or more of these recoveries each month.

Using DPM and disk-based data protection, data can be synchronized as frequently as every 15

minutes and maintained as long as 448 days.

Tape-Based Backup and Archive

Magnetic tape and similar storage media offer an inexpensive and portable form of data

protection that is particularly useful for long-term storage.

In DPM, you can back up data from a computer directly to tape (D2T). You can also back up data

from the disk-based replica (D2D2T). The advantage of creating your long-term backup on tape

from the disk-based replica is that the backup operation can occur at any time with no impact on

the computer being protected.

Additionally, a thorough disaster recovery plan includes offsite storage of critical information—you

want to be able to recover your organization's data, should your facility be damaged or destroyed.

Tape is a popular and convenient medium for offsite storage.

Using DPM, data can be backed up to tape as frequently as daily for short-term protection, and it

can be maintained as long as 99 years for long-term protection.

By using software solutions from DPM partners, you can use removable media such as a USB

hard drive in place of tape. For more information, see

(http://go.microsoft.com/fwlink/?LinkId=98869).

See Also

Management Tools