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sfdisk -d /dev/sda | sfdisk /dev/sdb --force
mdadm -a /dev/md0 /dev/sdb1
mdadm -a /dev/md1 /dev/sdb5
mdadm -a /dev/md2 /dev/sdb6
mdadm -a /dev/md3 /dev/sdb7
mdadm -a /dev/md4 /dev/sdb8
mdadm -a /dev/md5 /dev/sdb9
mdadm -a /dev/md6 /dev/sdb10
i just had a look at "man sfdisk" to see what this actually does.
wow.
where did you get that command from? is it the recommended way to achieve what you want?
what do you actually want to achieve with that?
shouldn't you have dumped the partition table to a file first, instead of piping it straight back into sfdisk?
also...
man sfdisk wrote: -f, --force
Disable all consistency checking.