4.2.8 Remote Backup or Mirroring
Description
This article is from the storage FAQ part2, by Rodney D. Van Meter with numerous contributions by others.
4.2.8 Remote Backup or Mirroring
It's now possible, in several fashions, to backup systems over a
network or even a modem, for recovery from fires and even disk
crashes.
Channel extenders, such as the CHANNELink
http://www.cnt.com/products/clnk/clnk2.htm from CNT and the Symmetrix
Remote Data Facility http://www.emc.com/symmdoc.htm, are used by some
mainframe systems to create remote copies of disks (remote mirroring)
as a disaster recovery measure. Early systems used dedicated fibre or
telephone lines and ran proprietary communications protocols. Newer
systems from CNT are capable of communicating over general-purpose
wide-area networks, thus saving the costs of the dedicated lines.
It's also possible to backup PCs over your modem in an incremental
fashion, through your ISP; one example is http://www.telebackup.com.
Two other companies that do this over the Internet (out of, I believe,
more than 30) are Connected Corp., Framingham, MA; Virtual Technology
Corp., Minneapolis, MN.
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