disk mirroring

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disk mirroring

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

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)





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)
References in periodicals archive ?
To resync (or re-silver), many disk mirror solutions perform a complete copy of the data from the operational copy to the stale copy.
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.
The disk mirrors the book, except that the links to references are hot.
Unlike conventional disk mirrors, it cannot serve as a failover data source to protect against hardware failures.
However, tape backup should accompany disk mirrors to most cost effectively address the growing intrusion and corruption problem.
If you have applied business continuance disk mirrors, then double the amount to $350,400.