Re: jessie won't install/boot on a Dell Poweredge R815
On Fri, Jun 24, 2016 at 06:22:37PM -0400, Jeffrey Mark Siskind wrote:
>Please note that bootint with rootdelay=20 does not solve the problem. It only
> 1. If I attempt a fresh USB install of jessie, when md0 is correctly built
> before the install, the process of doing the fresh install breaks
> md0. When it gets to grub install, components of md0 are missing (even
> though all six components were present before the install). And
> grub-install fails. At this point it is impossible to complete the install
> and produce a bootable system.
> 2. If I do a fresh minimal USB install of wheezy, rebuilding md0 in the
> process, and then do a dist-upgrade to jessie, I can manually add
> rootdelay=20 in grub and boot into jessie with all six components of md0
> present. But if I do so, then after boot, if I do dpkg-reconfigure pc-grub,
> doing that gives errors, drops components of md0, precludes me from adding
> them back, fails to install grub, and leaves the machine in an unbootable
>I fear that there is a problem writing to disk. Even if I boot with
>rootdelay=20, unless the kind of writes that dpkg-reconfigure pc-grub does are
>different, doing ordinary writes to disk may also corrupt the disk.
>Please let me know what new information you would like me to gather.
Ummm. Checking back up-thread, I can see that you're using md0 across
more than 4 disks and you're trying to boot off it with
grub-pc. You're hitting BIOS limitations here - the BIOS is only
capable of accessing 4 disks. I'm *guessing* that maybe the newer grub
in jessie is just being pickier about checking BIOS access to those
disks. Try just using 4 of the disks for md0, and I'd expect it to
Steve McIntyre, Cambridge, UK. firstname.lastname@example.org
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