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Non-RAID drive architectures also exist, and are referred to by acronyms with tongue-in-cheek similarity to RAID: JBOD (just a bunch of disks): described multiple hard disk drives operated as individual independent hard disk drives. SPAN or BIG: A method of combining the free space on multiple hard disk drives from "JBoD" to create a spanned ...
RAID 1+0: (see: RAID 10) creates a striped set from a series of mirrored drives. The array can sustain multiple drive losses so long as no mirror loses all its drives. [29] JBOD RAID N+N: With JBOD (just a bunch of disks), it is possible to concatenate disks, but also volumes such as RAID sets. With larger drive capacities, write delay and ...
RAID 5E, RAID 5EE, and RAID 6E (with the added E standing for Enhanced) generally refer to variants of RAID 5 or 6 with an integrated hot-spare drive, where the spare drive is an active part of the block rotation scheme. This spreads I/O across all drives, including the spare, thus reducing the load on each drive, increasing performance.
Diagram of a RAID 1 setup. RAID 1 consists of an exact copy (or mirror) of a set of data on two or more disks; a classic RAID 1 mirrored pair contains two disks.This configuration offers no parity, striping, or spanning of disk space across multiple disks, since the data is mirrored on all disks belonging to the array, and the array can only be as big as the smallest member disk.
Linux supports Matrix RAID and Rapid Storage Technology (RST) through device mapper, with dmraid tool, for RAID 0, 1 and 10. And Linux MD RAID, with mdadm tool, for RAID 0, 1, 10, and 5. Set up of the RAID volumes must be done by using the ROM option in the Matrix Storage Manager, then further configuration can be done in DM-RAID or MD-RAID. [10]
The key difference between DAS and NAS is that DAS storage does not incorporate any network hardware and related operating environment to provide a facility to share storage resources independently of the host so is only available via the host to which the DAS is attached.
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Workstation, personal computer, media center, Tablet PC, embedded system Windows Server (NT family) Microsoft: 1993 OS/2: Windows Server 2025 (version 10.0.26100.2605) November 1, 2024 US$1050 5 CALs server; other editions dependent on number of CALs purchased Proprietary; Source-available: Server, NAS, embedded system z/OS: IBM: 2000 OS/390 ...