Madadm-notes

All the damn details of mdadm that you can never remember when a !@#$!#@ drive dies

• resync
• disks RAID1 array

sfdisk can mirror two disks (usually) so that you can rebuild quickly..

• examples
• boundary issues
• warnings

there are ways to do this as a single command with pipes, but it sucks and does not always create the partitions correctly..

safer way: (Assuming sdb is toast)

1. sfdisk -d /dev/sda > sda.out
2. sfdisk /dev/sdb < sda.out
3. sfdisk -l