Jan 18, 2012
A RAID 1+0, sometimes called RAID 1&0 or RAID 10. RAID 10 is a stripe of mirrors. It requires a minimum of 4 hard disk drives. Assuming each of these 4 hard disk drives is of the same capacity then 50% of the available storage space is allowed in a RAID 10 configuration. For example, if there were 4 x 1000GB hard disks the total available storage would be 2000GB. RAID 10 can be implemented over more than 4 hard disk drives, however this is less common.
Each disk access is split into full-speed disk accesses to different drives, yielding read and write performance like RAID 0 but without necessarily guaranteeing every stripe is on both drives. Another layout uses a more RAID 0 like arrangement over the first half of all drives, and then a second copy in a similar layout over the second half of all drives – making sure that all copies of a block are on different drives. This has high read performance because only one of the two read locations must be found on each access, but writing requires more head seeking as two write locations must be found.
Due to the configuration RAID 10 has a low failure rate, however we have seen a number of failed RAID 10 arrays and have recovered these successfully. The configuration of RAID 10 is some what simpler than that of RAID-5 or RAID-6 arrays. Consequently we have found the recovery of data from RAID 10 arrays to be successful on all occasions. In fact we are proud to say that Cheadle Data Recovery has a 100% recovery rate on RAID 10 arrays. If you do have any issues with your RAID array, please contact us on 0161 408 4857.
RAID 10 setup over 4 hard disk drives.