I'm trying to check the state of the drives on a remote server running Debian wheezy. I'm using a software RAID10 on top of, I guess, xen, since the entries in /dev are /dev/xvda and /dev/xvdb
But it I try
smartctl -a /dev/xvda
/dev/xvda: Unable to detect device type Smartctl: please specify device type with the -d option.
I've tried various device type guesses, none work
Similar problem with hddtemp, which reports
ERROR: /dev/xvda: can't determine bus type (or this bus type is unknown)
I've searched the smartmontools documentation, but can't find any discussion of virtual disks. . .
How do I get behind the virtualisation to something smart tools or hddtemp can work with?