Categories: Technology

Difference between RAID 0 and RAID 1

Main Difference

RAID is a capacity innovation that joins various circle drive parts into a solitary intelligent unit so it acts as one drive when associated with some other equipment. RAID 1 offers additional through reflecting, i.e., information is composed indistinguishable to two drives. RAID 0 offers no excess and rather utilizes striping, i.e., information is part of all the drives. This implies RAID 0 offers no adaptation to internal failure; if any of the constituent drives falls flat, the RAID unit comes up short. RAID 0 offers to stripe with no equality or reflecting. Striping implies information is split uniformly crosswise over two or more plates. For instance, in a two-plate RAID 0 set up, the principal, third, fifth (etc) pieces of information would be composed of the main hard circle and the second, fourth, 6th (etc) squares would be composed of the second hard circle. A drawback of this methodology is that if even one of the plate crashes, the whole RAID 0 setup falls flat since information gets to be unrecoverable. In specialized terms, this is depicted as an absence of adaptation to internal failure. A RAID 1 setup is distinctive. There is no striping; the whole information is reflected on every plate. This outcome in various duplicates of information. What’s more, in the event that one of the plate fizzles, information can, in any case, be recouped on the grounds that it is in place in the second circle (most RAID 1 setups utilize just 2 circles, however, some may utilize more), which means RAID 1 is deficiency tolerant. RAID 1 offers higher unwavering quality as a result of excess; regardless of the fact that one of the drives falls flat inside and out, information is still accessible on the other. Nonetheless, RAID exhibits don’t shield information from bit decay, the progressive rot away media that causes irregular bits on the hard drive to flip, undermining the information. Cutting edge document frameworks like ZFS and Btrfs ensure against bit decay by means of per-piece checksumming, and ought to be utilized be individuals genuine about securing their information for quite a long while. RAID 0 offers quickly compose times in light of the fact that the information is part and kept in touch with a few circles in parallel. Keeps in touch with a RAID 1 unit is slower contrasted and RAID 0, however about the same as keeping in touch with a solitary circle. This is on account of the whole information is composed of two circles, yet in parallel. Peruses are additionally quick in RAID 0. In perfect situations, the exchange bound of the exhibit is the exchange rate of all the circles included, and restricted just by the pace of the RAID controller. Peruse from RAID 1 could conceivably offer such execution help, contingent on the RAID controller. The Keen controllers split the perusing assignment in a way that exploits information repetition and peruses distinctive squares from various plates.

Raid 0

RAID 0 (otherwise called a stripe set or striped volume) parts (stripes) information equally crosswise over two or more circles, without equality data, repetition, or adaptation to non-critical failure. Since RAID 0 gives no adaptation to internal failure or excess, the disappointment of one drive will bring about the whole exhibit to fizzle; as a consequence of having information striped over all circles, the disappointment will bring about aggregate information misfortune. This design is commonly actualized having speed as the expected goal. RAID 0 is ordinarily used to expand execution, in spite of the fact that it can likewise be utilized as an approach to make a huge intelligent volume out of two or more physical disks. A RAID 0 setup can be made with circles of contrasting sizes, however, the storage room added to the exhibit by every plate is restricted to the span of the littlest plate. A few benchmarks of desktop applications show RAID 0 execution to be possibly superior to a solitary drive. Another article analyzed these cases and presumed that striping does not generally expand execution (in specific circumstances it will really be slower than a non-RAID setup), however, much of the time it will yield a noteworthy change in performance. Synthetic benchmarks show distinctive levels of execution upgrades when different HDDs or SSDs are utilized as a part of a RAID 0 setup, contrasted and single-drive execution. Some engineered benchmarks likewise demonstrate a drop in execution for the same correlation.


RAID 1 comprises of a precise (or mirror) of an arrangement of information on two or more circles; a great RAID 1 reflected pair contains two plates. This setup offers no equality, striping, or traversing of plate space over different circles, subsequent to the information is reflected on all plates having a place with the cluster, and the exhibit must be as large as the littlest part plate. This format is valuable when perused execution or unwavering quality is more vital than compose execution or the subsequent information stockpiling limit. Any read solicitation can be overhauled and took care of for any drive in the cluster; in this manner, contingent upon the way of I/O load, arbitrary read execution of a RAID 1 exhibit may measure up to up to the total of every part’s performance, while the compose execution stays at the level of a solitary circle. Be that as it may, if circles with various hops are utilized as a part of a RAID 1 cluster, generally compose execution is equivalent to the rate of the slowest disk. Manufactured benchmarks show differing levels of execution upgrades when numerous HDDs or SSDs are utilized as a part of a RAID 1 setup, contrasted and single-drive execution. In any case, some manufactured benchmarks additionally demonstrate a drop in execution for the same correlation.

Key Differences

  • The Mirroring, redundancy and fault tolerance is present only in RAID 1.
  • The striping option is available in RAID 0 only.

Video Explanation