Linux software-RAID and bootloader

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Hi,

how is it ensured that superblock(for example version 1.2) can be
created at 4KiB from the beginning of the drive? I mean isn't there a
hazard that this area on the disk is already occupied for example by
the bootloader stage 1.5?

In addition, if software-RAID is created using partitions for example
like this: mdadm --create --verbose --level=1 --metadata=1.2
--chunk=64 --raid-devices=2 /dev/md0 /dev/sdb1 /dev/sdc1

..then how should one ensure that for example MBR/GPT is mirrored or
bootloader data is mirrored which both are located out of partition
boundaries?



regards,
Martin
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