Allegedly, on or about 28 May 2015, Neal Becker sent:
> the rescue, which DOES work, says:
> 
>         linux16 /vmlinuz-0-rescue-39e9e51995d040a88bf6f0ae625ead80 
> root=UUID=7246327b-1905-4fe2-9b6b-b9376017264f ro
> rootflags=subvol=root00 
> rhgb quiet
> 
> 
> the default, which does NOT work, says:
>         linux16 /vmlinuz-4.0.4-301.fc22.x86_64 root=/dev/sdb8 ro 
> rootflags=subvol=root00 rhgb quiet LANG=en_US.UTF-8
> 
> 
> I did see an error about not finding /dev/sdb8 - I think that's the
> problem. 

I had the same problem with prior release(s).  When the computer booted
from the install media, it was sda and the harddrive was sdb.
Post-installation, the computer booted from the harddrive, and called it
sda, but all the written configs point to sdb.

Change the grub config to either point "root=" to sda, or do the more
reliable thing, and use the same UUID code that the working rescue entry
used.

It's a particularly dumb fault to do with boot environments (it's well
known that some BIOSs rearrange the order of devices, depending on what
was booted, or which devices responded first), and those who coded the
installer ought to know better than to use sdb, when there's a reliable
UUID written to the hard drive.

On a related note, since someone had the foresight to make a "rescue"
entry, perhaps someone might, also, have thought to include a "find the
right partition" set of entries.  So when booting fails, a fallback is a
menu with the results from something that probes the partitions, then
lists all the likely bootable candidates for you, and you can pick the
right one.  That'd get you into a working system, without having to try
and figure out the grub command line with inadequate information, and a
horrible environment to work in.

-- 
[tim@localhost ~]$ uname -rsvp
Linux 3.9.10-100.fc17.x86_64 #1 SMP Sun Jul 14 01:31:27 UTC 2013 x86_64

All mail to my mailbox is automatically deleted, there is no point
trying to privately email me, I will only read messages posted to the
public lists.

George Orwell's '1984' was supposed to be a warning against tyranny, not
a set of instructions for supposedly democratic governments.

ZNQR LBH YBBX



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