Re: RAID1 with only ONE member?

[Laurent CARON <lcaron@unix-scripts.info>]

Andy a écrit :
> Hello List,
>
> I am building a new backup box and would like to use linux software
> RAID-1. But I can only afford to buy one disk right now.
>
> Can I configure a RAID-1 array with only a single member for the time
> being, and then add additional member disks at a future date?
>
> Is is simple and safe to add additional members? I have only used the 
> Debian installer to configure the software RAID thus far...
>
> Thanks, Andy


Yes,

You can build your array with the following command

mdadm -Cv /dev/md0 -l1 -n2 /dev/sda1 missing

for example

when you get another drive just partition it, and add the partition to 
the array with

mdadm /dev/md0 -a /dev/sdb1 for example

Laurent