Hi! This problem has been solved but since some points might be of general interest even to Debian developers here is a report on the issue.
To summarize: There are 3 disks on the machine sda, sdb, sdc. Debian Sid is installed on sda. sdb is _not_ mounted but contained an older installation of Debian Squeeze. The problem was that grub "saw" that old installation on sdb although sdb was _not_ mounted. For example, I deleted grub.cfg and updated grub and all old installations from sdb would reapear. Equally so during booting. At the beginning I thought that was the problem of the MBR at sdb but Bob Proulx and Igor Cicimov helped in excluding that option. Then I reformated sdb and, of course, the installations were no more. I would say that this is something that should be changed. Grub simply should not read unmounted disks. Best, Mladen. -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20130218214247.gb29...@grad.hr