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Old 03-08-2012, 07:16 PM   #1
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how to remove disk partition metadata for /dev/mapper/ddf1_*


I rcv'd a new server from a vendor. When I try to install
RHEL 5.5 via DVD.. I get to the disk partitioning screen
and see nothing but two (relatively) small partitions with
names like:

I want to access the normal DOS partition on the disks.
and so on...

What is best way to remove the metadata, which is likely
causing the RHEL installer to present the drives as a RAID.
I dunno what I am going to do with a 7GB RAID mirror
when I have 2 x 2 TB available.

Is it likely that the system integrator (vendor) configured the
drives with a hardware RAID controller but then removed the
controller before we got the box? Or maybe these drives were
pulled from such box and inserted into my box without a

In any event, I am merely trying to delete this metadata.
I imagine a long dd write would work however I would
like to know the proper way.

Old 03-09-2012, 01:02 AM   #2
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Location: Sydney, Australia
Distribution: Mageia 6
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Can you post the results of /sbin/fdisk -l

Old 03-09-2012, 04:22 PM   #3
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well... that data is already blown away. I can tell you about it.
when I ran sfdisk --list` it would show 4 primary partitions of 0 size
I believe their may have also been a comment about Linux Mapper or something indicating that.
Then when I went into fdisk and p(rint) the status, it would show no partitions.

dmraid would recognize the special paritions with the /dev label mentioned previously.
However for some reason `dmraid -eE` returned errors... perhaps because I had already
mucked with the partitions and broke them while using fdisk (attempting to delete things
partitions that I did not understand)

so finally I just dd the entire disk with zero.

Now, when I run the RHEL installer, I can see raw devices.



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