Le 11/08/2019 à 09:42, Reco a écrit :
The big question is - why would anyone make a RAID10 consisting of two drives. It's impossible to reshape it (mdadm does not support it for RAID10), it's I/O characteristics are indistinguishable from RAID1.
With two drives the default RAID 10 "near" layout is identical to RAID 1. But the RAID 10 "far" layout is expected to provide better sequential read speed than RAID 1 (like RAID 0).
<https://raid.wiki.kernel.org/index.php/Introduction#RAID-10>"RAID-10 has a layout ("far") which can provide sequential read throughput that scales by number of drives, rather than number of RAID-1 pairs. You can get about 95 % of the performance of the RAID-0 with same amount of drives."