gmirror disk mirroring

[Stephen Kelly]

Hi All,

I'm having a problem trying to set up disk mirroring of two 80G Western Digital
IDE drives. I'm using the instructions at
[url]http://people.freebsd.org/~rse/mirror/[/url]
I've included these instructions at the end of this e-mail.
When I reboot the system for the first time as instructed, it starts to boot but
then just starts printing the following messages to the screen:

init: can't exec getty `usr/libexec/getty` for port ttyv1:
No such file or directory
init: can't exec getty `usr/libexec/getty` for port ttyv2:
No such file or directory
init: can't exec getty `usr/libexec/getty` for port ttyv3:
No such file or directory
init: can't exec getty `usr/libexec/getty` for port ttyv4:
No such file or directory
..
..
..


Can anyone tell me where I'm going wrong/what is happening?
Thanks so much,
Stephen

The instructions:
# make sure the second disk is treated as a really fresh one
# (not really necessary, but makes procedure more deterministically ;-)
dd if=/dev/zero of=/dev/ad1 bs=512 count=79

# place a GEOM mirror label onto second disk
# (actually on the last block of the disk)
gmirror label -v -n -b round-robin gm0 /dev/ad1

# activate GEOM mirror kernel layer
# (makes the /dev/mirror/gm0 device available)
gmirror load

# place a PC MBR onto the second disk
# (with a single FreeBSD slice /dev/mirror/gm0s1 covering the whole disk)
fdisk -v -B -I /dev/mirror/gm0

# place a BSD disklabel onto /dev/mirror/gm0s1
# (ATTENTION: in FreeBSD 5-STABLE before 14-Jan-2005 the
# /dev/mirror/gm0s1 device has to be specified as just "mirror/gm0s1" or
# the bsdlabel(8) will use the incorrect GEOM name "gm0s1" instead!)
# (NOTICE: figure out what partitions you want with "bsdlabel /dev/ad0" before)
# (NOTICE: start "a" partition at offset 16, "c" partition at offset 0)
bsdlabel -w -B /dev/mirror/gm0s1 # initialize
bsdlabel -e /dev/mirror/gm0s1 # create custom partitions

# manually copy filesystem data from first to to second disk
# (same procedure for partitions "g", etc)
newfs -U /dev/mirror/gm0s1a
mount /dev/mirror/gm0s1a /mnt
dump -L -0 -f- / | (cd /mnt; restore -r -v -f-)
newfs -U /dev/mirror/gm0s1d
mount /dev/mirror/gm0s1d /mnt/var
dump -L -0 -f- /var | (cd /mnt/var; restore -r -v -f-)
newfs -U /dev/mirror/gm0s1e
mount /dev/mirror/gm0s1e /mnt/usr
dump -L -0 -f- /usr | (cd /mnt/usr; restore -r -v -f-)

# adjust new system configuration for GEOM mirror based setup
cp -p /mnt/etc/fstab /mnt/etc/fstab.orig
sed -e 's/dev\/ad0/dev\/mirror\/gm0/g' </mnt/etc/fstab.orig >/mnt/etc/fstab
echo 'swapoff="YES"' >>/mnt/etc/rc.conf # for 5.3-RELEASE only
echo 'geom_mirror_load="YES"' >>/mnt/boot/loader.conf

# instruct boot stage 2 loader on first disk to boot
# with the boot stage 3 loader from the second disk
# (mainly because BIOS might not allow easy booting from second ATA disk
# or at least requires manual intervention on the console)
echo "1:ad(1,a)/boot/loader" >/boot.config

# reboot system
# (for running system with GEOM mirror on second disk)
shutdown -r now

# make sure the first disk is treated as a really fresh one
# (also not really necessary, but makes procedure more deterministically ;-)
dd if=/dev/zero of=/dev/ad0 bs=512 count=79

# switch GEOM mirror to auto-synchronization and add first disk
# (first disk is now immediately synchronized with the second disk content)
gmirror configure -a gm0
gmirror insert gm0 /dev/ad0

# wait for the GEOM mirror synchronization to complete
sh -c 'while [ ".`gmirror list | grep SYNCHRONIZING`" != . ]; do sleep 1; done'

# reboot into the final two-disk GEOM mirror setup
# (now actually boots with the MBR and boot stages on first disk
# as it was synchronized from second disk)
shutdown -r now

[Emanuel Strobl]

Am Sonntag, 27. Februar 2005 03:54 schrieb Stephen Kelly:

> Hi All,
>
> I'm having a problem trying to set up disk mirroring of two 80G Western
> Digital IDE drives. I'm using the instructions at
> [url]http://people.freebsd.org/~rse/mirror/[/url]
> I've included these instructions at the end of this e-mail.
> When I reboot the system for the first time as instructed, it starts to
> boot but then just starts printing the following messages to the screen:
>
> init: can't exec getty `usr/libexec/getty` for port ttyv1:
> No such file or directory
> init: can't exec getty `usr/libexec/getty` for port ttyv2:
> No such file or directory
> init: can't exec getty `usr/libexec/getty` for port ttyv3:
> No such file or directory
> init: can't exec getty `usr/libexec/getty` for port ttyv4:
> No such file or directory
> .
> .
> .

Something at the dump/restore stage went wrong or your /etc/fstab is wrong.
Delete /boot.congig an boot from the initial disk, btw. is your second drive
really on primary slave? That's why I hate how-tos, people just type it word
by word without knowing what they do.
If your disk ist secondary master, it's not ad1 but ad2, in GENERIC ata is
compiled with ATA_STATIC_ID.

Forget the howto and read the man pages, it's the shorter way if the howto
doesn't work for you.

Best regards,

-Harry

>
>
> Can anyone tell me where I'm going wrong/what is happening?
> Thanks so much,
> Stephen
>
> The instructions:
> # make sure the second disk is treated as a really fresh one
> # (not really necessary, but makes procedure more deterministically ;-)
> dd if=/dev/zero of=/dev/ad1 bs=512 count=79
>
> # place a GEOM mirror label onto second disk
> # (actually on the last block of the disk)
> gmirror label -v -n -b round-robin gm0 /dev/ad1
>
> # activate GEOM mirror kernel layer
> # (makes the /dev/mirror/gm0 device available)
> gmirror load
>
> # place a PC MBR onto the second disk
> # (with a single FreeBSD slice /dev/mirror/gm0s1 covering the whole disk)
> fdisk -v -B -I /dev/mirror/gm0
>
> # place a BSD disklabel onto /dev/mirror/gm0s1
> # (ATTENTION: in FreeBSD 5-STABLE before 14-Jan-2005 the
> # /dev/mirror/gm0s1 device has to be specified as just "mirror/gm0s1" or
> # the bsdlabel(8) will use the incorrect GEOM name "gm0s1" instead!)
> # (NOTICE: figure out what partitions you want with "bsdlabel /dev/ad0"
> before) # (NOTICE: start "a" partition at offset 16, "c" partition at
> offset 0) bsdlabel -w -B /dev/mirror/gm0s1 # initialize
> bsdlabel -e /dev/mirror/gm0s1 # create custom partitions
>
> # manually copy filesystem data from first to to second disk
> # (same procedure for partitions "g", etc)
> newfs -U /dev/mirror/gm0s1a
> mount /dev/mirror/gm0s1a /mnt
> dump -L -0 -f- / | (cd /mnt; restore -r -v -f-)
> newfs -U /dev/mirror/gm0s1d
> mount /dev/mirror/gm0s1d /mnt/var
> dump -L -0 -f- /var | (cd /mnt/var; restore -r -v -f-)
> newfs -U /dev/mirror/gm0s1e
> mount /dev/mirror/gm0s1e /mnt/usr
> dump -L -0 -f- /usr | (cd /mnt/usr; restore -r -v -f-)
>
> # adjust new system configuration for GEOM mirror based setup
> cp -p /mnt/etc/fstab /mnt/etc/fstab.orig
> sed -e 's/dev\/ad0/dev\/mirror\/gm0/g' </mnt/etc/fstab.orig >/mnt/etc/fstab
> echo 'swapoff="YES"' >>/mnt/etc/rc.conf # for 5.3-RELEASE only
> echo 'geom_mirror_load="YES"' >>/mnt/boot/loader.conf
>
> # instruct boot stage 2 loader on first disk to boot
> # with the boot stage 3 loader from the second disk
> # (mainly because BIOS might not allow easy booting from second ATA disk
> # or at least requires manual intervention on the console)
> echo "1:ad(1,a)/boot/loader" >/boot.config
>
> # reboot system
> # (for running system with GEOM mirror on second disk)
> shutdown -r now
>
> # make sure the first disk is treated as a really fresh one
> # (also not really necessary, but makes procedure more deterministically
> ;-) dd if=/dev/zero of=/dev/ad0 bs=512 count=79
>
> # switch GEOM mirror to auto-synchronization and add first disk
> # (first disk is now immediately synchronized with the second disk content)
> gmirror configure -a gm0
> gmirror insert gm0 /dev/ad0
>
> # wait for the GEOM mirror synchronization to complete
> sh -c 'while [ ".`gmirror list | grep SYNCHRONIZING`" != . ]; do sleep 1;
> done'
>
> # reboot into the final two-disk GEOM mirror setup
> # (now actually boots with the MBR and boot stages on first disk
> # as it was synchronized from second disk)
> shutdown -r now
>
>
>
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