[bug #33582] grub-install failure with: cannot stat `/dev/root'

[John Stanley]

URL:
  <http://savannah.gnu.org/bugs/?33582>

                 Summary: grub-install failure with: cannot stat `/dev/root'
                 Project: GNU GRUB
            Submitted by: jps
            Submitted on: Thu 16 Jun 2011 11:59:21 PM GMT
                Category: Installation
                Severity: Major
                Priority: 5 - Normal
              Item Group: Software Error
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: John Stanley
        Originator Email: address@hidden
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 
                 Release: other
         Reproducibility: Every Time
         Planned Release: None

    _______________________________________________________

Details:

Hi,

I just built grub-1.99 and am having a problem with grub-install. If I run
grub-install I get the following error:

  grub-install --no-floppy --grub-setup=/bin/true /dev/sdb
/usr/sbin/grub-probe: error: cannot stat `/dev/root'.

This does not occur with grub-1.99rc2. So, I tried reverting the changes in
grub-core/kern/emu/getroot.c in going from grub-1.99rc2 to grub-1.99, ie, I
applied the following patch to grub-1.99/grub-core/kern/emu/getroot.c:

--- grub-1.99.old/grub-core/kern/emu/getroot.c  2011-04-25 09:11:52.000000000
-0400
+++ grub-1.99.new/grub-core/kern/emu/getroot.c  2011-04-16 09:28:59.000000000
-0400
@@ -216,6 +216,9 @@
   /* Now scan visible mounts for the ones we're interested in.  */
   for (i = entry_len - 1; i >= 0; i--)
     {
+      if (entries[i].major != 0)
+       continue; /* not a virtual device */
+
       if (!*entries[i].device)
        continue;

---

This makes grub-1.99/grub-core/kern/emu/getroot.c identical to
grub-1.99rc2/grub-core/kern/emu/getroot.c.

With this reversion, grub-1.99 now works fine. I'm not sure if this is a bug
or not, but it would be nice to resolve this issue.

I'm running on an i686-pc-linux-gnu system under linux-2.6.39.1, gcc-4.5.3,
glib-2.13, binutils-2.21, udev-171.

thanks much for your time,
John





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