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disk mirroring
(redirected from Disk mirror)

    Also found in: Wikipedia 0.01 sec.

disk mirroring

The recording of redundant data for fault tolerant operation. Data are written on two partitions of the same disk or on two separate disks within the same system. Disk mirroring uses the same controller. RAID 1 provides mirroring, which was first accomplished only with SCSI drives, but later with ATA (IDE) drives. See disk duplexing and RAID.



Mirroring on a Budget
Arco was one of the first companies to offer RAID 1 mirroring using two inexpensive ATA (IDE) drives. The motherboard cable plugs into a PCI card or the drive bay version (above), and two cables go out to primary and secondary drives. If one fails, the other takes over. (Image courtesy of Arco Computer Products, Inc., www.arcoide.com)

(hardware, storage)disk mirroring - Use of one or more mirrors of a hard disk.


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However, tape backup should accompany disk mirrors to most cost effectively address the growing intrusion and corruption problem.
Tape storage growth surprisingly optimistic: tape has weathered the ... by Moore, Fred / Computer Technology Review
But a disk mirror does not protect against data deletions (when a file is deleted, it is simultaneously deleted from both sides of the mirror), nor does it protect against power outages or other disasters that shut down the data center.
Data protection: recovery with tape by Harada, Rich / Computer Technology Review
The new Disk Mirror Status agent can detect an error on either side of a disk mirror and automatically restart the faulty side of the mirror.
Compuware Delivers Advanced EcoTOOLS Support for Managing Sybase ... by Business Wire
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