- Excel / Meridian Data Computer Drive User Manual

SECURSTOR ASTRA ES 87
RAID 10 – Mirror + Stripe
Mirroring/striping combines both of the previous RAID 1 and RAID 0 disk array types. RAID 10 is similar though
not identical to RAID 0+1. RAID 10 can increase performance by reading and writing data in parallel while
protecting data with duplication. At least four drives are needed for RAID 10 to be installed. With four disk drives,
the drive pairs are striped together with one pair mirroring the first pair. The data capacity is similar to a RAID 1
disk array, with half of the total storage capacity used for redundancy. An added plus for using RAID 10 is that, in
many situations, such a disk array offers double fault tolerance. Double fault tolerance may allow your logical
drive to continue to operate depending on which two disk drives fail.
Data Stripe
Data
Mirror
Disk Driv es
Figure 26: RAID 10, takes a data mirror on one drive pair and stripes it to over two other drive pairs
RAID 10 arrays require an even number of physical drives and a minimum of four.
For RAID 10 characteristics with an odd number of disk drives, use RAID 1E.
Recommended applications: Imaging Applications, Database Servers, General Fileservers.