Data is at the core of almost every business decision made. This means that if your business suffers data loss it can experience lost business. Although this can be prevented, it won’t be enough to back up data if you don’t have protection from online disk failure. The most cost-effective and simplest way to maintain access and data protection is to add RAID to your storage configuration. RAID stands for Redundant Array of Independent Disks. RAID is a method of combining several hard drives into one unit. The benefits include faster performance and data protection, depending on how you implement RAID.
RAID tradeoff between disk capacity and the availability. The cost is basically due to the tradeoff between disk capacity and the availability or performance of additional data. For example, RAID 1, RAID 10 and small RAID 6 disk counts are costly (50 percent) in terms of lost disk space, but high in availability of data. Performance also depends on the pattern of access (random / sequential, read / write, long / short) and user numbers.
Use our free RAID Calculator
A RAID solution is definitely the way to go, whether it is hardware failover or improved input / output performance. This RAID calculator tool uses three key metrics to calculate important specifications for a RAID array. After entering the RAID mode, single disk size, and quantity of disks, the RAID calculator will give you the raw storage size as well as the usable storage size. Before you chose your RAID configuration, you should use our free raid calculator tool so you know just how much space will be available to you.
How does a RAID work? By using striped sets to simultaneously record fragmented data across multiple disks, RAID 0 systems increase read / write speeds. Due to the absence of data redundancy in RAID 0 arrays, disk failure may still result in lost files. RAID 1 is the simplest option for greater tolerance of faults. With disk mirroring capabilities, these systems safeguard their contents, creating total redundancy for effective data protection. By distributing parity across multiple drives, RAID 5 achieves fast write speeds with striped sets while protecting data. RAID 5 is the most popular of all options for use with web servers. RAID 6 arrays are similar to RAID 5, but even if two drives fail, an additional parity block provides stability. RAID 10 combines the advantages of stripping and mirroring to maximize performance and protection against failed components, offering the greatest fault tolerance. RAID 0 + 1 arrays invert the configuration of RAID 10 with striped array mirrored sets.