[Bug 987354] Re: error: no such partition. grub-pc fails to detect mdraid partitions

2012-04-30 Thread Christian Weiske
Same problem: Booting from sdb gives me error: on such partition.
Runing dpkg-reconfigure grub-pc shows my boot drive selected.

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  error: no such partition. grub-pc fails to detect mdraid partitions

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[Bug 987354] Re: error: no such partition. grub-pc fails to detect mdraid partitions

2012-04-30 Thread Phillip Susi
I think you are having a different issue than TJ, so you should file a
new bug report.  Since TJ's issue is a misconfiguration, I'm closing
this bug report.


** Changed in: grub2 (Ubuntu)
   Status: Confirmed = Invalid

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  error: no such partition. grub-pc fails to detect mdraid partitions

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[Bug 987354] Re: error: no such partition. grub-pc fails to detect mdraid partitions

2012-04-28 Thread Phillip Susi
And if you run dpkg-reconfigure grub-pc, is your boot drive(s) selected?

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  error: no such partition. grub-pc fails to detect mdraid partitions

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[Bug 987354] Re: error: no such partition. grub-pc fails to detect mdraid partitions

2012-04-28 Thread Alex
This also happens without md-raid. I have a normal Ubuntu installation
on sdb. I just upgraded and got the same error. Grub is unable to find
the partitions.

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  error: no such partition. grub-pc fails to detect mdraid partitions

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[Bug 987354] Re: error: no such partition. grub-pc fails to detect mdraid partitions

2012-04-23 Thread TJ
** Description changed:

- After upgrading Oneiric to Precise on a 32-bit server using:
+ After upgrading Oneiric to Precise on a 32-bit server that has md-raid
+ mirrored boot drives using:
  
  do-release-upgrade -d
  
  On reboot GRUB2 totally fails to find its 2nd stage files. It reports:
  
  error: no such partition
  
  This also happens when entering the rescue command-line and trying to do
  operations such as:
  
  grub ls
  error: no such partition
  
  Initial inspection of the grub environment indicates the UUIDs and grub
  prefix are as they were prior to the update.
  
  It is not possible to do anything with GRUB2 that requires it to
  find/load second stage files - which puts most of its command-line tools
  out of reach.

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  error: no such partition. grub-pc fails to detect mdraid partitions

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[Bug 987354] Re: error: no such partition. grub-pc fails to detect mdraid partitions

2012-04-23 Thread TJ
This is caused when the existing GRUB configuration is incorrect and
GRUB only 'knows' about one disk in the MD RAID set.

In this instance there is a RAID-1 mirror array of two disks on the
first two IDE PATA controller ports (both as masters).

When the system boots BIOS does not know anything about software RAID
devices so it reads the grub bootloader files from one drive. If that
drive hasn't been updated by 'update-grub' then it will have older
binary files on it.

When the GRUB package changes enough that the Application Binary
Interface (ABI) changes it means that the older binaries cannot load
grub's support libraries since the entry points and function signatures
have changed.

A work-around to get the system booted is to enter the BIOS set-up and
change the order of the disks in the DM RAID array so the disk with the
updated master boot record is read first. This is easy to figure out if
it is a 2-disk mirror.

Once the system is started do:

dpkg-reconfigure grub-pc

and ensure all disks the system might boot from are selected.

** Changed in: grub2 (Ubuntu)
 Assignee: TJ (intuitivenipple) = (unassigned)

** Changed in: grub2 (Ubuntu)
   Status: In Progress = Confirmed

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  error: no such partition. grub-pc fails to detect mdraid partitions

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[Bug 987354] Re: error: no such partition. grub-pc fails to detect mdraid partitions

2012-04-23 Thread Bug Watch Updater
** Changed in: grub2 (Debian)
   Status: Unknown = New

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  error: no such partition. grub-pc fails to detect mdraid partitions

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[Bug 987354] Re: error: no such partition. grub-pc fails to detect mdraid partitions

2012-04-23 Thread Brian Murray
** Changed in: grub2 (Ubuntu)
   Importance: Undecided = High

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  error: no such partition. grub-pc fails to detect mdraid partitions

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Re: [Bug 987354] Re: error: no such partition. grub-pc fails to detect mdraid partitions

2012-04-23 Thread Phillip Susi
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

On 04/23/2012 12:21 PM, TJ wrote:
 When the system boots BIOS does not know anything about software RAID
 devices so it reads the grub bootloader files from one drive. If that
 drive hasn't been updated by 'update-grub' then it will have older
 binary files on it.

If that is the case, then this is a misconfiguration, not a bug.  If you
run dpkg-reconfigure grub-pc, both disks should be configured to have
grub installed.

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