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Disk versus Tape Backup
The Challenge
Today's tape-based data backup infrastructures have inherent
weaknesses: Tape is not a random access medium. Backed up data must be accessed
as it was written to tape. Recovering a single file from a tape often requires
reading a substantial portion of the tape and can be very time consuming. The
recovery time of restoring from tape can be very costly. Recent studies have
shown most IT administrators do not feel comfortable with their tape backups
today.
The Solution
Disk-to-disk backup can help by complimenting tape backup. Within the
data center, data loss is most likely to occur as a result of file corruption or
inadvertent deletion. In these scenarios, disk-to-disk backup allows a much
faster and far more reliable restore process than is possible with a tape
device, greatly reducing the demands on the tape infrastructure and on the
manpower required to maintain it. Disk-to-disk backup is quickly becoming the
standard for backup since data can be backed up more quickly than with tape, and
restore times are dramatically reduced.
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