zfs discuss - Nov 2007 - Error: "Volume size exceeds limit for this system"

Hi all,

I am experiencing an issue when trying to set up a large ZFS volume in
OpenSolaris build 74 and the same problem in Nexenta alpha 7. I have looked on
Google for the error and have found zero (yes, ZERO) results, so I''m
quite surprised! Please can someone help?

I am setting up a test environment in VMware Workstation 6.0 before I unleash
this on real hardware. The virtual system has an IDE HDD, IDE CD-ROM and 4 750
GB SCSI disks (c2t0d0 --> c2t3d0). Once working, I hope to use the iSCSI
target to see the volume from a Windows box.

I create the zpool with:
[i]zpool create zp raidz c2t0d0 c2t1d0 c2t2d0 c2t3d0[/i]

This completes fine, and then a [i]zpool iostat[/i] reports the pool as having
2.93T free. All makes sense so far.

Then, I try to create a ZFS volume in there of size 1.25T with the following
command:
zfs create -V 1.25T zp/test

This then fails with:
cannot create ''zp/test'': volume size exceeds limit for this
system

Please can someone help me with this? I''ve tried making sense of the
word "system" in this context but haven''t come up with much.
A volume of 1T works fine. Could it be something to do with having a 32 bit CPU?

Many thanks,
Chris
 
 
This message posted from opensolaris.org

it''s got to do with vmware obviously, as we''ve been able to
make +20TB
fs with zfs

selim
------------------------------------------------------
Blog: http://fakoli.blogspot.com/


On 11/7/07, Chris Murray <chrismurray84 at gmail.com>
wrote:
> Hi all,
>
> I am experiencing an issue when trying to set up a large ZFS volume in
OpenSolaris build 74 and the same problem in Nexenta alpha 7. I have looked on
Google for the error and have found zero (yes, ZERO) results, so I''m
quite surprised! Please can someone help?
>
> I am setting up a test environment in VMware Workstation 6.0 before I
unleash this on real hardware. The virtual system has an IDE HDD, IDE CD-ROM and
4 750 GB SCSI disks (c2t0d0 --> c2t3d0). Once working, I hope to use the
iSCSI target to see the volume from a Windows box.
>
> I create the zpool with:
> [i]zpool create zp raidz c2t0d0 c2t1d0 c2t2d0 c2t3d0[/i]
>
> This completes fine, and then a [i]zpool iostat[/i] reports the pool as
having 2.93T free. All makes sense so far.
>
> Then, I try to create a ZFS volume in there of size 1.25T with the
following command:
> zfs create -V 1.25T zp/test
>
> This then fails with:
> cannot create ''zp/test'': volume size exceeds limit for
this system
>
> Please can someone help me with this? I''ve tried making sense of
the word "system" in this context but haven''t come up with
much. A volume of 1T works fine. Could it be something to do with having a 32
bit CPU?
>
> Many thanks,
> Chris
>
>
> This message posted from opensolaris.org
> _______________________________________________
> zfs-discuss mailing list
> zfs-discuss at opensolaris.org
> http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
>

-- 
------------------------------------------------------
Blog: http://fakoli.blogspot.com/

The comment in the header file where this error is defined says:

  /* volume is too large for 32-bit system */

So it does look like it''s a 32-bit CPU issue.  Odd, since file systems
don''t normally have any sort of dependence on the CPU type....

Anton
 
 
This message posted from opensolaris.org

2007/11/9, Anton B. Rang <rang at acm.org>:
> The comment in the header file where this error is defined says:
>
>   /* volume is too large for 32-bit system */
>
> So it does look like it''s a 32-bit CPU issue.  Odd, since file
systems don''t normally have any sort of dependence on the CPU type....
This is not a file system limit, it is a device limit. A zfs volume is
a device, not a file system.

Thanks for the help guys - unfortunately the only hardware at my disposal just
at the minute is all 32 bit, so I''ll just have to wait a while and fork
out on some 64-bit kit before I get the drives. I''m a home user so
I''m glad I didnt buy the drives and discover I couldnt use them without
spending even more!!

Chris
 
 
This message posted from opensolaris.org