kern/153552: 'zfsboot from 8.2-RC1 freeze at boot time

Henri Hennebert hlh at
Thu Dec 30 15:20:10 UTC 2010

>Number:         153552
>Category:       kern
>Synopsis:       'zfsboot from 8.2-RC1 freeze at boot time
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Dec 30 15:20:09 UTC 2010
>Originator:     Henri Hennebert
>Release:        8.2-RC1 FreeBSD 8.2-RC1
FreeBSD arapahoe.virtualbox.bel 8.2-RC1 FreeBSD 8.2-RC1 #0: Wed Dec 22 17:34:20 UTC 2010     root at  amd64

When trying to boot from second slice with zfsboot from 8.2-RC1, the boot
freeze with "-" in the upper left corner of the screen.

Disk configuration:

arapahoe# gpart show
=>      63  25165728  ad0  MBR  (12G)
        63  12582801    1  freebsd  (6.0G)
  12582864  12582927    2  freebsd  [active]  (6.0G)

=>       0  12582801  ad0s1  BSD  (6.0G)
         0  10485760      1  freebsd-ufs  (5.0G)
  10485760   2097041      2  freebsd-swap  (1.0G)

=>       0  12582927  ad0s2  BSD  (6.0G)
         0  12582927      1  freebsd-zfs  (6.0G)

I put zfsboot with the `classical method' booting with FreeBSD-8.2-RC1-amd64-livefs.iso:

dd if=/boot/zfsboot of=/dev/ad0s2a count=1
dd if=/boot/zfsboot of=/dev/ad0s2a skip=1 seek=1024

I grab an old zfsboot (v15 aware) from a 8.1-STABLE r213582 (thank you
snapshot) and this one work perfectly.

All this have been tested under virtualbox-ose-3.2.10_2 *and* a 'real server'.

zfsboot from 8.1-STABLE r213582 work fine.


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