目录
RAID
Description: Lots of disk combination become a more big virtual disk by RAID, and it will have more fast I/O speed.
Create RAID
mdadm -C /dev/md[0|10|5|1] -l 10 -n[Number] -x 2 /dev/sb{a..z}
-l level
-n diskCount
-x hotSpare
Check RAIDinfo and syncSchedule
mdadm -D /dev/mdName
Remove disk member from RAID
mdadm /dev/mdName -f /dev/sdMemberName # Manual assign fault device
mdadm /dev/mdName -r /dev/sdMemerName # Remove the fault device
Add RAID device
mdadm /dev/mdName -a /dev/sdMemberName
Stop/delete RAID
mdadm -D -s > /etc/mdadm.conf #create new config file -s:--scan
mdadm -S /dev/mdName --> stop/delete RAID
mdadm -As /dev/mdName -->restart RAID
Re-add the hot spare to RAID
mdadm -G /dev/mdName -n 6 #RAID10 not support.