Eugeneapolinary Ju wrote: > How can I tell wich HDD to swap, when the "cat /proc/mdstat" says one > HDD of the RAID1 array has died? > > Does the HDD's has some serial numbers, that I can see in "reality", > and I can get that number from e.g.: a commands output? > > How could I know wich HDD to swap in e.g.: a RAID1 array? > > thank you > > # smartctl -a /dev/sda and so on This will give you the serial # of the working drives. You'll then have to power down and search for the one not in your serial# list. Make sure to have a good backup first.