Package: debian-installer
Severity: whishlist
Tags: d-i

Latest debian installer on Squeeze Iso disk debian-6.0.0-amd64-BD-1.iso used to
install new computer.

At the level of creating md devices it is not possible to create degraded md 
devices.
For example if you have only one disk of two available for the md configuration 
it is
not possible to create an md1 with one active and one missing device. You need 
an minimum
of 2 disks available.
The same issue with raid-5 (3 needed, but in degraded mode working already with 
2 devices)
or with raid-6 (4 needed, but in degraded mode must work with 2 devices)

It is possible to use spare devices as missing but this is not the fact what I 
mean.

I can create e.g. manually md devices in the console with

mdadm --create --raid-devices=2 --raid-lcvel=1 /dev/md1 /dev/sda1
mdadm --create --raid-devices=2 --raid-level=5 /dev/md1 /dev/sda1 /dev/sdb1 
missing
mdadm --create --raid-devices=2 --raid-level=6 /dev/md1 /dev/sda1 /dev/sdb1 
missing missing

so I can later add the missing devices. Please extend the md configuration so 
degraded
raid array's can be build at time of installation. A warning message should be 
seen here,
if an degraded array will be build.

-- System Information:
Debian Release: 6.0
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.32-5-amd64 (SMP w/8 CPU cores)

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