Ray Morris wrote:
"man mdadm" or:
http://tinyurl.com/4pjnu43
Alturnatively he might want to create a mirror using LVM not a block
device. Answer when you create the LV using "lvcreate" use the -m option
to set the number of mirror copies. Alturnatively you can use lvconvert
to change a normal LV into a mirrored one.
The question of how to get the system back if a disk fails in a tricky
one.... If a disk fails the system should keep on working as there is a
copy of the information so it will continue to work, Hardware might have
problems with the drive if it is not a clean failure though, what is
needed is to reduce out the damaged disk and add a new undamaged one,
the one problem is the BOOT block if the disk is the boot device, then
you might need use grub to setup a new boot block on the new device.
James
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