ZFS on entire disks setup

[Dmitry Morozovsky]

Dear colleagues,

is there a way to configure ZFS-only setup without partitions?

I tried to reproduce the trick with `skip=1 seek=1024', and have loot/loader
running, but it does not see the pool.

Thanks in advance.

--
Sincerely,
D.Marck                                     [DM5020, MCK-RIPE, DM3-RIPN]
[ FreeBSD committer:                                 marck@... ]
------------------------------------------------------------------------
*** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck@... ***
------------------------------------------------------------------------
_______________________________________________
freebsd-current@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-current
To unsubscribe, send any mail to "freebsd-current-unsubscribe@..."

[Stefan Bethke-2]

Am 26.09.2009 um 13:39 schrieb Dmitry Morozovsky:

> Dear colleagues,
>
> is there a way to configure ZFS-only setup without partitions?
>
> I tried to reproduce the trick with `skip=1 seek=1024', and have  
> loot/loader
> running, but it does not see the pool.

This sequence is working for me:
dd if=/boot/zfsboot of=/dev/da0 count=1
dd if=/boot/zfsboot of=/dev/da0 skip=1 seek=1024
zpool create zroot /dev/da0
zpool set bootfs=zroot zroot
cd /usr/src && make installworld installkernel distribution DESTDIR=/
zroot
cp /boot/loader.conf /zroot/boot/loader.conf
cp /etc/rc.conf /zroot/etc/
touch /zroot/etc/fstab
echo 'zfs_load="YES"' >>/zroot/boot/loader.conf
echo 'vfs.root.mountfrom="zfs:zroot"' >>/zroot/boot/loader.conf
zpool export zroot
zpool import zroot
cp /boot/zfs/zpool.cache /zroot/boot/zfs/
zfs set mountpoint=legacy zroot

... except that it doesn't anymore.  I saw this working about two  
months ago, but now it fails to mount root.  Verbose boot doesn't give  
any indication why ZFS can't find the pool.


Stefan

--
Stefan Bethke <stb@...>   Fon [phone]




_______________________________________________
freebsd-current@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-current
To unsubscribe, send any mail to "freebsd-current-unsubscribe@..."

[krad-2]

2009/9/26 Stefan Bethke <stb@...>

> Am 26.09.2009 um 13:39 schrieb Dmitry Morozovsky:
>
>  Dear colleagues,
>>
>> is there a way to configure ZFS-only setup without partitions?
>>
>> I tried to reproduce the trick with `skip=1 seek=1024', and have
>> loot/loader
>> running, but it does not see the pool.
>>
>
> This sequence is working for me:
> dd if=/boot/zfsboot of=/dev/da0 count=1
> dd if=/boot/zfsboot of=/dev/da0 skip=1 seek=1024
> zpool create zroot /dev/da0
> zpool set bootfs=zroot zroot
> cd /usr/src && make installworld installkernel distribution DESTDIR=/zroot
> cp /boot/loader.conf /zroot/boot/loader.conf
> cp /etc/rc.conf /zroot/etc/
> touch /zroot/etc/fstab
> echo 'zfs_load="YES"' >>/zroot/boot/loader.conf
> echo 'vfs.root.mountfrom="zfs:zroot"' >>/zroot/boot/loader.conf
> zpool export zroot
> zpool import zroot
> cp /boot/zfs/zpool.cache /zroot/boot/zfs/
> zfs set mountpoint=legacy zroot
>
> ... except that it doesn't anymore.  I saw this working about two months
> ago, but now it fails to mount root.  Verbose boot doesn't give any
> indication why ZFS can't find the pool.
>
>
> Stefan
>
> --
> Stefan Bethke <stb@...>   Fon [phone]
>
>
>
>
>
> _______________________________________________
> freebsd-current@... mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-current
> To unsubscribe, send any mail to "freebsd-current-unsubscribe@..."
>

have the performance issues with zvols been fixed. I remember a while ago it
wasn't a good idea to run swap on a zvol. This is why i left a partition
free for swap
_______________________________________________
freebsd-current@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-current
To unsubscribe, send any mail to "freebsd-current-unsubscribe@..."

[Olivier Smedts]

2009/9/26 krad <kraduk@...>:

> 2009/9/26 Stefan Bethke <stb@...>
>
>> Am 26.09.2009 um 13:39 schrieb Dmitry Morozovsky:
>>
>>  Dear colleagues,
>>>
>>> is there a way to configure ZFS-only setup without partitions?
>>>
>>> I tried to reproduce the trick with `skip=1 seek=1024', and have
>>> loot/loader
>>> running, but it does not see the pool.
>>>
>>
>> This sequence is working for me:
>> dd if=/boot/zfsboot of=/dev/da0 count=1
>> dd if=/boot/zfsboot of=/dev/da0 skip=1 seek=1024
>> zpool create zroot /dev/da0
>> zpool set bootfs=zroot zroot
>> cd /usr/src && make installworld installkernel distribution DESTDIR=/zroot
>> cp /boot/loader.conf /zroot/boot/loader.conf
>> cp /etc/rc.conf /zroot/etc/
>> touch /zroot/etc/fstab
>> echo 'zfs_load="YES"' >>/zroot/boot/loader.conf
>> echo 'vfs.root.mountfrom="zfs:zroot"' >>/zroot/boot/loader.conf
>> zpool export zroot
>> zpool import zroot
>> cp /boot/zfs/zpool.cache /zroot/boot/zfs/
>> zfs set mountpoint=legacy zroot
>>
>> ... except that it doesn't anymore.  I saw this working about two months
>> ago, but now it fails to mount root.  Verbose boot doesn't give any
>> indication why ZFS can't find the pool.
>>
>>
>> Stefan
>>
>> --
>> Stefan Bethke <stb@...>   Fon [phone]
>>
>>
>>
>>
>>
>> _______________________________________________
>> freebsd-current@... mailing list
>> http://lists.freebsd.org/mailman/listinfo/freebsd-current
>> To unsubscribe, send any mail to "freebsd-current-unsubscribe@..."
>>
>
>
> have the performance issues with zvols been fixed. I remember a while ago it
> wasn't a good idea to run swap on a zvol. This is why i left a partition
> free for swap

Still not a good idea, I've got lockups for many minutes when
consuming heavy memory ressources, for example when doing a "make" in
ports/emulators/virtualbox with firefox and amarok opened. I've got
2GB RAM on amd64.

> _______________________________________________
> freebsd-current@... mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-current
> To unsubscribe, send any mail to "freebsd-current-unsubscribe@..."
>

--
Olivier Smedts                                                 _
                                        ASCII ribbon campaign ( )
e-mail: olivier@...        - against HTML email & vCards  X
www: http://www.gid0.org    - against proprietary attachments / \

  "Il y a seulement 10 sortes de gens dans le monde :
  ceux qui comprennent le binaire,
  et ceux qui ne le comprennent pas."
_______________________________________________
freebsd-current@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-current
To unsubscribe, send any mail to "freebsd-current-unsubscribe@..."

[O. Hartmann-5]

Olivier Smedts wrote:

> 2009/9/26 krad <kraduk@...>:
>> 2009/9/26 Stefan Bethke <stb@...>
>>
>>> Am 26.09.2009 um 13:39 schrieb Dmitry Morozovsky:
>>>
>>> �Dear colleagues,
>>>> is there a way to configure ZFS-only setup without partitions?
>>>>
>>>> I tried to reproduce the trick with `skip=1 seek=1024', and have
>>>> loot/loader
>>>> running, but it does not see the pool.
>>>>
>>> This sequence is working for me:
>>> dd if=/boot/zfsboot of=/dev/da0 count=1
>>> dd if=/boot/zfsboot of=/dev/da0 skip=1 seek=1024
>>> zpool create zroot /dev/da0
>>> zpool set bootfs=zroot zroot
>>> cd /usr/src && make installworld installkernel distribution DESTDIR=/zroot
>>> cp /boot/loader.conf /zroot/boot/loader.conf
>>> cp /etc/rc.conf /zroot/etc/
>>> touch /zroot/etc/fstab
>>> echo 'zfs_load="YES"' >>/zroot/boot/loader.conf
>>> echo 'vfs.root.mountfrom="zfs:zroot"' >>/zroot/boot/loader.conf
>>> zpool export zroot
>>> zpool import zroot
>>> cp /boot/zfs/zpool.cache /zroot/boot/zfs/
>>> zfs set mountpoint=legacy zroot
>>>
>>> ... except that it doesn't anymore. �I saw this working about two months
>>> ago, but now it fails to mount root. �Verbose boot doesn't give any
>>> indication why ZFS can't find the pool.
>>>
>>>
>>> Stefan
>>>
>>> --
>>> Stefan Bethke <stb@...> � Fon [phone]
>>>
>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> freebsd-current@... mailing list
>>> http://lists.freebsd.org/mailman/listinfo/freebsd-current
>>> To unsubscribe, send any mail to "freebsd-current-unsubscribe@..."
>>>
>>
>> have the performance issues with zvols been fixed. I remember a while ago it
>> wasn't a good idea to run swap on a zvol. This is why i left a partition
>> free for swap
>
> Still not a good idea, I've got lockups for many minutes when
> consuming heavy memory ressources, for example when doing a "make" in
> ports/emulators/virtualbox with firefox and amarok opened. I've got
> 2GB RAM on amd64.
>
>> _______________________________________________
>> freebsd-current@... mailing list
>> http://lists.freebsd.org/mailman/listinfo/freebsd-current
>> To unsubscribe, send any mail to "freebsd-current-unsubscribe@..."
>>
>

I see those lockups on three boxes when compiling or having heavy disk
I/O on three different boxes, one (private) UP amd64 with 2GB, one SMP
4-core box amd64 with 8 GB and one SMP 8-core box amd64 SMP with 16 GB
RAM. It doesn't matter what filesystem is involved, either UFS2 or ZFS!
When compiling world AND compiling KDE4-libs or GCC44/GCC45, even those
boxes with 8 or 16 GB of RAM and 4 or 8 cores have painful performance
issues (locking for several seconds, no response over network or, if
enabled and running, X11/mouse gets jumpy and completely inresponsible,
quite near useless that moment).
I doubt that ZFS causes the problem, it sounds more like a scheduling
problem introduced with the early 8.0 (since 7.2 ran fluently on
mentioned boxes, but have had other issues).
All three boxes under my supervision run FreeBSD 8.0-RC1/amd64 and they
all use UFS2-partioned harddrives for OS separated from data drives
using ZFS-only. Even copying/backup data from /home on a ZFS volume to
another ZFS volume with compression enabled (on another SATA-II drive)
does not reveale those issues on the 2GB, UP amd64 box as showed when
the box is under heavy load when the GCC compiler is running or PERL
scripts are doing their duties.


Regards,
Oliver

_______________________________________________
freebsd-current@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-current
To unsubscribe, send any mail to "freebsd-current-unsubscribe@..."

[Dmitry Morozovsky]

On Sat, 26 Sep 2009, Stefan Bethke wrote:

SB> > is there a way to configure ZFS-only setup without partitions?
SB> >
SB> > I tried to reproduce the trick with `skip=1 seek=1024', and have
SB> > loot/loader
SB> > running, but it does not see the pool.
SB>
SB> This sequence is working for me:
SB> dd if=/boot/zfsboot of=/dev/da0 count=1
SB> dd if=/boot/zfsboot of=/dev/da0 skip=1 seek=1024
SB> zpool create zroot /dev/da0
SB> zpool set bootfs=zroot zroot
SB> cd /usr/src && make installworld installkernel distribution DESTDIR=/zroot
SB> cp /boot/loader.conf /zroot/boot/loader.conf
SB> cp /etc/rc.conf /zroot/etc/
SB> touch /zroot/etc/fstab
SB> echo 'zfs_load="YES"' >>/zroot/boot/loader.conf
SB> echo 'vfs.root.mountfrom="zfs:zroot"' >>/zroot/boot/loader.conf
SB> zpool export zroot
SB> zpool import zroot
SB> cp /boot/zfs/zpool.cache /zroot/boot/zfs/
SB> zfs set mountpoint=legacy zroot
SB>
SB> ... except that it doesn't anymore.  I saw this working about two months
SB> ago, but now it fails to mount root.  Verbose boot doesn't give any
SB> indication why ZFS can't find the pool.

Well, after all, I've managed to boot 8.0-RC2/amd64 from 1+0 zpool without
either UFS or GPT/MBR.  Will test further.

As for the source of previous failure -- It seems bootfs property in my
previous experiment did not set properly...

--
Sincerely,
D.Marck                                     [DM5020, MCK-RIPE, DM3-RIPN]
[ FreeBSD committer:                                 marck@... ]
------------------------------------------------------------------------
*** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck@... ***
------------------------------------------------------------------------
_______________________________________________
freebsd-current@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-current
To unsubscribe, send any mail to "freebsd-current-unsubscribe@..."

[krad-2]

2009/10/29 Dmitry Morozovsky <marck@...>

> On Sat, 26 Sep 2009, Stefan Bethke wrote:
>
> SB> > is there a way to configure ZFS-only setup without partitions?
> SB> >
> SB> > I tried to reproduce the trick with `skip=1 seek=1024', and have
> SB> > loot/loader
> SB> > running, but it does not see the pool.
> SB>
> SB> This sequence is working for me:
> SB> dd if=/boot/zfsboot of=/dev/da0 count=1
> SB> dd if=/boot/zfsboot of=/dev/da0 skip=1 seek=1024
> SB> zpool create zroot /dev/da0
> SB> zpool set bootfs=zroot zroot
> SB> cd /usr/src && make installworld installkernel distribution
> DESTDIR=/zroot
> SB> cp /boot/loader.conf /zroot/boot/loader.conf
> SB> cp /etc/rc.conf /zroot/etc/
> SB> touch /zroot/etc/fstab
> SB> echo 'zfs_load="YES"' >>/zroot/boot/loader.conf
> SB> echo 'vfs.root.mountfrom="zfs:zroot"' >>/zroot/boot/loader.conf
> SB> zpool export zroot
> SB> zpool import zroot
> SB> cp /boot/zfs/zpool.cache /zroot/boot/zfs/
> SB> zfs set mountpoint=legacy zroot
> SB>
> SB> ... except that it doesn't anymore.  I saw this working about two
> months
> SB> ago, but now it fails to mount root.  Verbose boot doesn't give any
> SB> indication why ZFS can't find the pool.
>
> Well, after all, I've managed to boot 8.0-RC2/amd64 from 1+0 zpool without
> either UFS or GPT/MBR.  Will test further.
>
> As for the source of previous failure -- It seems bootfs property in my
> previous experiment did not set properly...
>
> --
> Sincerely,
> D.Marck                                     [DM5020, MCK-RIPE, DM3-RIPN]
> [ FreeBSD committer:                                 marck@... ]
> ------------------------------------------------------------------------
> *** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck@... ***
> ------------------------------------------------------------------------
> _______________________________________________
> freebsd-current@... mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-current
> To unsubscribe, send any mail to "freebsd-current-unsubscribe@..."
>

why do you want to use it without a partition label?
_______________________________________________
freebsd-current@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-current
To unsubscribe, send any mail to "freebsd-current-unsubscribe@..."

[Dmitry Morozovsky]

On Thu, 29 Oct 2009, krad wrote:

k> > SB> > is there a way to configure ZFS-only setup without partitions?

[snip]

k> > Well, after all, I've managed to boot 8.0-RC2/amd64 from 1+0 zpool without
k> > either UFS or GPT/MBR.  Will test further.
k> >
k> > As for the source of previous failure -- It seems bootfs property in my
k> > previous experiment did not set properly...
k>
k> why do you want to use it without a partition label?

Well, consider it brain-damaged (though successful) experiment ;-P

Seriously, making dedicated machine, I'd betted skip unneeded layers.  All our
servers currently work without real MBRs, and previous ZFS based ones are GPT.

--
Sincerely,
D.Marck                                     [DM5020, MCK-RIPE, DM3-RIPN]
[ FreeBSD committer:                                 marck@... ]
------------------------------------------------------------------------
*** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck@... ***
------------------------------------------------------------------------
_______________________________________________
freebsd-current@... mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-current
To unsubscribe, send any mail to "freebsd-current-unsubscribe@..."