Bug#392042: software RAID volumes can not be partitioned

[Julian Mehnle]

I just ran into this after, over a period of two days, trying to figure 
out why D-I / partman doesn't allow me to partition /dev/md0, and why it 
would not even recognize a manual partitioning created via `cfdisk`.

I think it would be very useful if partman supported partitionable md 
devices.  It would save you from having to configure, and in case of 
failure, rebuild, several individual (classic, non-partitionable) md 
arrays.  (Also, using LVM on top of a single big md device as a 
substitute for partitioning isn't really an option because LVM doesn't 
support write barriers.)

Let me know if I can help with this -- anything short of providing a 
patch, given that I have absolutely no clue of the partman internals.

-Julian


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Bug#392042: software RAID volumes can not be partitioned

[Julian Mehnle]

A thought:  The patch from #303914 might have to be partially undone in 
order to (re)admit partitionable md devices.


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Bug#392042: software RAID volumes can not be partitioned

[Shaya Potter]

Package: debian-installer
Severity: important

debian installer lets one setup a raid fairly easily.  however, it gives 
no indication that one can't partition an array, but one has to 
partition the base disks and create the arrays out of the partitions.

In fact, the installer will go ahead an partition the disk for if you 
tell it to do it automatically.  took me way too long to figure out what 
the problem was, as I'm used to using 3ware cards where they just deal 
with whole disks, and I'd partition the array itself.


-- System Information:
Debian Release: testing/unstable
  APT prefers testing
  APT policy: (650, 'testing'), (600, 'unstable')
Architecture: i386 (i686)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.16-2-686
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)


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