![]() ![]() The primary difference between RAID 5 and RAID 6 is that a RAID 5 array can continue to function following a single disk failure, but a RAID 6 array can sustain two simultaneous disk failures and still continue to function. The RAID array then uses the parity information it stores on the remaining disks to re-create the failed disk's contents on the new disk. If a disk within the set fails, an administrator can replace the disk and then the RAID array. This redundancy takes the form of parity information that is written to each disk within the RAID set. RAID 5 and RAID 6 use redundancy to guard against hard disk failure. RAID 6, admins must think about the business use case, as well as the tradeoffs involved in choosing one level over the other. Neither RAID 5 nor RAID 6 is clearly superior to the other, and there are many variables to consider in order to make an informed decision about which RAID level to implement. RAID 5 uses a disk striping with parity and is ideal for application and file servers, while RAID 6 uses two parity stripes and often protects mission-critical data. RAID, or redundant array of independent disks, enables organizations to store data on multiple HDDs or SSDs and can help protect data in the event of a drive failure. ![]()
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