Re: [zfs-discuss] ZFS boot vs Linux fuse

2008-10-22 Thread Johan Hartzenberg 
Reboot to the grub menu
Move to the failsafe kernel entry
tap e to edit entry.
go to the kernel entry and tap e again
Append -kv to the end of the line
Accept and tap b to boot the line.

After some output you will be prompted to mount the root pool on /a - Enter
y to accept.

You will then get a shell prompt.  Reboot and all should be fine.

I actually need to ask a question:
Did the person who imported the pool under Linux use the old (circa Feb
2008) zfs-fuse, or the new one (Sept 2008)?

If the later, then it is possible that they also did a zpool upgrade and now
your Solaris no longer understands the ZFS on-disk format.  If this is the
case, upgrade solaris (Boot from new media, go to the text-more installer,
and select upgrade when prompted for the install type).  This will update
Solaris to understand the ZFS version.  I think the older zfs-fuse used to
support ZFS version 8 or 9, the new one supports version 12 or 13.

On Wed, Oct 22, 2008 at 5:15 PM, Andrew Gallatin [EMAIL PROTECTED] wrote:

 Hi,

 I have a triple boot amd64 Linux/FreeBSD/OpenSolaris box used for Q/A.   It
 is in a data center where I don't have easy physical access to the machine.
   It was working fine for months, now I see this at boot time on the serial
 console:


 SunOS Release 5.11 Version snv_86 64-bit
 Copyright 1983-2008 Sun Microsystems, Inc.  All rights reserved.
 Use is subject to license terms.
 NOTICE: mount: not a UFS magic number (0x0)

 panic[cpu0]/thread=fbc245a0: cannot mount root path /ramdisk:a

 fbc446d0 genunix:rootconf+113 ()
 fbc44720 genunix:vfs_mountroot+65 ()
 fbc44750 genunix:main+d8 ()
 fbc44760 unix:_locore_start+92 ()

 I suspect the problem was caused when, under Linux, somebody foolishly
 exported then imported the Solaris rootfs using the Linux FUSE ZFS stuff so
 they could pull data off the Solaris side without a reboot.   I guess that
 must have done something to the pool so that Solaris no longer likes it.
 The linux ZFS tools list the history of the zpool as:

 History for 'rpool':
 2008-05-06.08:39:33 zpool create -f rpool_tmp c5t0d0s0
 2008-05-06.08:39:33 zfs create rpool_tmp/ROOT
 2008-05-06.08:39:33 zfs set compression=off rpool_tmp/ROOT
 2008-05-06.08:39:35 zfs set mountpoint=/a/export rpool_tmp/export
 2008-05-06.08:39:35 zfs set mountpoint=/a/export/home rpool_tmp/export/home
 2008-05-06.08:51:28 zpool set bootfs=rpool_tmp/ROOT/opensolaris rpool_tmp
 2008-05-06.08:51:29 zfs set mountpoint=/export/home rpool_tmp/export/home
 2008-05-06.08:51:29 zfs set mountpoint=/export rpool_tmp/export
 2008-05-06.08:51:31 zpool export -f rpool_tmp
 2008-05-06.08:51:38 zpool import -f 2344082471458403555 rpool
 2008-05-06.08:51:59 zpool set bootfs=rpool/ROOT/opensolaris rpool
 2008-05-06.08:52:20 zfs snapshot -r [EMAIL PROTECTED]
 2008-09-07.12:22:55 zpool import -ocachefile=/etc/zfs-cachefile -d
 /tmp/dev/ -f rpool
 2008-09-07.12:26:00 zpool export rpool
 2008-09-07.12:34:58 zpool import -d /tmp/dev rpool
 2008-09-07.09:59:40 zpool import -f rpool
 2008-09-07.17:20:56 zpool import -d /var/tmp/dev -f rpool
 2008-09-07.17:21:43 zpool export rpool
 2008-09-07.17:27:35 zpool import -d /var/tmp/dev/ rpool
 2008-09-07.17:32:10 zpool export rpool
 2008-09-07.17:32:23 zpool import -d /var/tmp/dev/ rpool
 2008-09-07.17:32:40 zpool export rpool
 2008-09-07.10:41:13 zpool import rpool
 2008-09-07.11:42:09 zpool export rpool
 2008-09-07.11:42:24 zpool import rpool
 2008-09-07.11:45:26 zpool export rpool
 2008-09-07.18:52:35 zpool import -d /var/tmp/dev rpool

 The entries from 2008-09-07 were operations using the linux tools, prior
 are from the Solaris installation.

 Is there any possible way to rescue the solaris installation remotely,
 using the linux install or via grub or kmdb from the serial console?  How?

 Alternatively, would it be possible to rescue the installation by either
 moving the disk to an OpenSolaris machine (b95) and doing something (what?)?
  Or by booting via the Indiana installation CD (what?).

 Thanks,

 Drew
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Re: [zfs-discuss] ZFS boot vs Linux fuse

2008-10-22 Thread Andrew Gallatin 
Johan Hartzenberg wrote:
 Reboot to the grub menu
 Move to the failsafe kernel entry

Ugh.  This is OpenSolaris (Indiana), and there *is* no failsafe
as far as I can tell.  There is one grub entry for Solaris:
#-- ADDED BY BOOTADM - DO NOT EDIT --
title OpenSolaris 2008.05 snv_86_rc2a X86
bootfs rpool/ROOT/opensolaris
kernel$ /platform/i86pc/kernel/$ISADIR/unix -B $ZFS-BOOTFS
module$ /platform/i86pc/$ISADIR/boot_archive
#-END BOOTADM


I'm sitting in grub now, trying to figure out what to do.
From an S10u5 box I have, it looks like there should
be a file /boot/x86.miniroot-safe, but that file does
not exist on the OpenSolaris box.

 Did the person who imported the pool under Linux use the old (circa Feb
 2008) zfs-fuse, or the new one (Sept 2008)?

I think I'm safe on this front.  zpool upgrade says its running version
10, which is what the identical (working) machine also says.

I think I'm just going to give up and re-install..  Sigh.

Drew
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Re: [zfs-discuss] ZFS boot vs Linux fuse

2008-10-22 Thread Neal Pollack 

On 10/22/08 09:02 AM, Andrew Gallatin wrote:

Johan Hartzenberg wrote:
  

Reboot to the grub menu
Move to the failsafe kernel entry



Ugh.  This is OpenSolaris (Indiana), and there *is* no failsafe
as far as I can tell.  There is one grub entry for Solaris:
#-- ADDED BY BOOTADM - DO NOT EDIT --
title OpenSolaris 2008.05 snv_86_rc2a X86
bootfs rpool/ROOT/opensolaris
kernel$ /platform/i86pc/kernel/$ISADIR/unix -B $ZFS-BOOTFS
module$ /platform/i86pc/$ISADIR/boot_archive
#-END BOOTADM


I'm sitting in grub now, trying to figure out what to do.
  


Simple, the equiv of failsafe for OpenSolaris is to boot the live-cd,
then manually mount your disk drive.
Sort of like using Knoppix to repair a linux install,
or WinPE to repair the mistake of installing windows...


From an S10u5 box I have, it looks like there should
be a file /boot/x86.miniroot-safe, but that file does
not exist on the OpenSolaris box.

  

Did the person who imported the pool under Linux use the old (circa Feb
2008) zfs-fuse, or the new one (Sept 2008)?



I think I'm safe on this front.  zpool upgrade says its running version
10, which is what the identical (working) machine also says.

I think I'm just going to give up and re-install..  Sigh.

Drew
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Re: [zfs-discuss] ZFS boot vs Linux fuse

2008-10-22 Thread Andrew Gallatin 
Neal Pollack wrote:

 Simple, the equiv of failsafe for OpenSolaris is to boot the live-cd,
 then manually mount your disk drive.

Yuck.  The lack of a failsafe is a *huge* step backwards, considering how 
fragile the ZFS root seems to be.   The idea of having to have somebody on-site 
at a datacenter with a CD to rescue a machine simply because another OS mounted 
the root directory is insane.  I hope S10 doesn't go this route. 

 Sort of like using Knoppix to repair a linux install,
 or WinPE to repair the mistake of installing windows...

I haven't needed to rescue a linux installation with a CD since most distros 
moved to grub 5 or so years ago.

Drew
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Re: [zfs-discuss] ZFS boot vs Linux fuse

2008-10-22 Thread Andrew Gallatin 
For what it is worth, I ended up using Linux to dd the Solaris partition from 
an identical machine.

I realize that ZFS is a huge step forward on a huge number of fronts, but the 
boot process has got to improve, or else it should not be offered as a root 
filesystem.  Even in the bad old days of SunOS 4 20 years ago, you could boot 
single user and fsck your way out of most problems.  In my case, I think the 
kernel really should have been able to mount the ZFS fs read only, as grub (and 
linux) were both able to access it.

Drew
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