RAID 1+0 ou RAID 10
RAID 10 is a concatenation of 2 RAID systems. RAID 1 and RAID 0.
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This system allows a secure storage, thanks to the RAID 1, but also a faster reading and writing, thanks to the RAID 0.
It is quite reliable, because the data can be lost only if two HDDs of the same pair (RAID 1) are down at the same time.
In a RAID 10, files are divided in blocks of X sectors. The first block is written on 2 HDDs (RAID 1, mirroring) and the second on 2 other HDDs (the other RAID 1). This system offers reliability and good speed.
A RAID 10 is more secure than a RAID 01.
The common RAID 10 failures are :