Package: debian-installer
Severity: normal
Tags: d-i
While trying to install Debian 8.2 on a set of drives to be RAID1ed by mdadm, partman wasn't listing either of the drives. Dropping to a shell showed that both drives existed (/dev/sdb and /dev/sdc were present). Eventually discovered that the drives had been part of an old mdadm array, and mdadm was trying unsucessfully to assemble them. Consequently, both the failed mdadm array and the two drives were being hidden from partman. Manually stopping the failed array using mdadm --stop and rerunning Detect disks caused partman to list the drives, partition them, RAID them, etc as normal.
-- System Information:
Debian Release: 8.2
APT prefers stable-updates
APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)
Kernel: Linux 3.16.0-4-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)