[ncolug] Re: grub raid lvm

  • From: Larry DiGioia <larry@xxxxxxxxxxxx>
  • To: ncolug@xxxxxxxxxxxxx
  • Date: Sat, 06 Apr 2013 18:04:15 -0400

This is one reason why I am of the "paint over it" school of thought. (I admit - *most* of the reason is because I just like things to always be shiny and new.)


I have always admired your "keep updating forever" method, and with various releases of Ubuntu, I have even done it myself, for as long as 5 years in one case. (I know, this is "nothing.") But I eventually noticed that with distribution upgrades, some features of later versions are lost and do not appear unless I do a clean install.

So now, my arbitrary limit is one distribution upgrade, then for the next release I do a clean install. It is also good practice for finding where things are and why, and hey, why not some shiny new hardware too...?

On 4/6/2013 1:32 PM, Mike wrote:
Just some info, more may follow.

Upgrading to wheezy from squeeze with grub-pc with /boot /root et. al. setup on raid lvm has been a treat.

The short of the story is core.img (a grub file) will not fit in a typical boot sector of old. If my memory is working right 64 blocks of 512 is 32K. Sectors 0 - 63. This needs to be increased in size. Recommended is 0 - 2047 or 2048 sectors, resulting in 2M or so boot sector. The fdisk in wheezy will do this automagically!

However as a warning it hasn't been so easy and steps to fix it are virtually non existent via google. I've manages to mostly recover, yet it hasn't been easy or pretty. A failing disk with sectors near the end hasn't helped either.

The moral of the story, I really like this setup, but must be crazy to keep it going... Maybe I'll update more of the story later.

Mike

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