bugGNU GRUB - Bugs: bug #42610, grub-install fails on DDF fake raid


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bug #42610: grub-install fails on DDF fake raid

Submitted by:  Michael Chang <mchang>
Submitted on:  Wed 25 Jun 2014 07:16:56 AM UTC  
Category: InstallationSeverity: Major
Priority: 5 - NormalItem Group: None
Status: NonePrivacy: Public
Assigned to: NoneOriginator Name: 
Open/Closed: OpenRelease: 
Release: 2.02~beta1Reproducibility: Every Time
Planned Release: 2.02

Wed 02 Mar 2016 02:38:09 PM UTC, comment #3:

We don't currently have DDF drivers, so assuming that DDF is fakeraid is the only way to install. But we can warn about the need of DDF fakeraid BIOS support.

Vladimir Serbinenko <phcoder>
Project Administrator
Sun 07 Dec 2014 11:13:46 AM UTC, comment #2:

My main concern is that by default mdadm allows IMSM only on hardware that supports it, so we are reasonably sure that it can be considered available at boot time. But DDF can be created as pure software array, which cannot be used as boot device in this case. So the actual question is not IMSM or DDF, but "is it hardware supported array or not".

Andrei Borzenkov <arvidjaar>
Project Member
Wed 25 Jun 2014 07:32:04 AM UTC, comment #1:

I found the patch for treating mdadm's IMSM as simple device is also feasible for DDF format.


The patch I was using for testing is attached. The installation and booting went successfully.

Dear developers, it would be great to know your opinions about this.


(file #31616)

Michael Chang <mchang>
Wed 25 Jun 2014 07:16:56 AM UTC, original submission:

When trying to install grub on disks with DDF firmware RAID managed by mdadm, the installation fails with error message.

> grub-install --target=i386-pc /dev/md126

Installing for i386-pc platform.
/usr/sbin/grub2-install: error: disk
`mduuid/616d632f0757e222039a73788ad21157' not found.

Here is mdadm information

> /sbin/mdadm --detail '/dev/md126' --export"


Michael Chang <mchang>


Attached Files
file #31616:  mdadm-ddf.patch added by mchang (2kB - text/x-patch - mdadm-ddf.patch)


Depends on the following items: None found

Items that depend on this one: None found


Carbon-Copy List
  • -unavailable- added by phcoder (Posted a comment)
  • -unavailable- added by arvidjaar (Posted a comment)
  • -unavailable- added by mchang (Submitted the item)

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    Follow 2 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Wed 02 Mar 2016 02:38:09 PM UTCphcoderPlanned ReleaseNone=>2.02
    Wed 25 Jun 2014 07:32:04 AM UTCmchangAttached File-=>Added mdadm-ddf.patch, #31616

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