RAID

RAID is an orchestrated approach to computer data storage in which data is written to more than one secondary storage device. Instead of storing all data in a single hard disk drive or solid-state drive, RAID coordinates two or more such devices into a disk array. When the computer writes data to secondary storage, the RAID system distributes the data across the array. There are several possible ways of doing this, and those various configurations are called RAID levels.

bit added to a binary string to ensure that the sum of the bit values is even or odd; used as an error detecting code

ZFS (previously Zettabyte File System) is a file system with volume management capabilities. It began as part of the Sun Microsystems Solaris operating system in 2001. Large parts of Solaris, including ZFS, were published under an open source license as OpenSolaris for around 5 years from 2005 before being placed under a closed source license when Oracle Corporation acquired Sun in 20092010. During 2005 to 2010, the open source version of ZFS was ported to Linux, Mac OS X (continued as MacZFS) and FreeBSD. In 2010, the illumos project forked a then-recent version of OpenSolaris, including ZFS,

ability of a system to continue functioning despite erroneous inputs or faults within some of its components

mdadm is a Linux utility used to manage and monitor software RAID devices. It is used in modern Linux distributions in place of older software RAID utilities such as raidtools2 or raidtools.

disk storage system which contains multiple disk drives

technique of segmenting data so that consecutive segments are stored on different physical storage devices

replication of logical disk volumes onto separate physical hard disks in real time to ensure continuous availability

OpenZFS is an open-source implementation of the ZFS file system and volume manager initially developed by Sun Microsystems for the Solaris operating system, and is now maintained by the OpenZFS Project. Similar to the original ZFS, the implementation supports features like data compression, data deduplication, copy-on-write clones, snapshots, RAID-Z, and virtual devices that can create filesystems that span multiple disks.

technique for using multiple disk drives that does not use RAID

spare component that is an active and connected part of a working system, ready to take over functionality with little or no interruption

any of a set of standard configurations of Redundant Arrays of Independent Disks

computer device that manages a hardware RAID array