Package: debian-installer
Version: installer from debian-8.1.0-amd64-netinst.iso
Severity: normal
Tags: d-i


while installing debian to a hard drive where it was before a RAID subsystem on
it, it's not possible to "create a new empty partition table on this device"
while using partman.

Partman will warn that "the selected device contains partitions used for
software RAID devices." and asks for confirmation "Remove existing software
RAID partitions?"

selecting yes just does nothing. 

stoping the MD devices in a shell with mdadm --stop makes it possible to
initiate a new empty partition on the device, but drops the warning about
underlaying RAID partitions.

Deleting the old raid partitions from the disk and creating new ones doesn't
work either. It replaces the partitions from the disk, without stopping the
existing/autodetected RAID. It ends with an "Error informing the kernel about
modifications to partition..."

Stoping the arrays manually allows the process to continue.

Otherwise, a reboot is needed in the middle of the install process.

I guess it could be fix by stopping the autodetected arrays before starting any
work on the partitions.


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