samba - Oct 2012 - Ceph samba size reporting troubles

Dear developement team,

I want to share a massive storage  casted with Ceph by samba with 
windows workstations.

All works well. My problem so is that in windows the ceph storage size 
statistics are wrong. Instead of seeing a 44TB hard drive I see a 176GB 
hard drive.

Under linux that issue doesn't show. The size are properly reported.

I investigated around and it seems that the problem belongs in the 
unability for windows
to treat blocksize over 65k and by default the block size is 4K.

Don't know how you can solve that issue but I really need to get that 
working right.

Thank in advance for your time and help.

-- 
signature

*Alph? Salas*
Ingeniero T.I

Descripci?n: cid:image001.gif at 01CAA59C.F14CE4B0*Kepler Data Recovery*

*Asturias 97, Las Condes**
Santiago- Chile**
*((*56 2) 362 7529*

asalas at kepler.cl
*www.kepler.cl <http://www.kepler.cl>*

Hi

On 24 October 2012 15:41, alphe salas michels <asalas at kepler.cl>
wrote:
> Dear developement team,
>
> I want to share a massive storage  casted with Ceph by samba with windows
> workstations.
>
> All works well. My problem so is that in windows the ceph storage size
> statistics are wrong. Instead of seeing a 44TB hard drive I see a 176GB
hard
> drive.
>
> Under linux that issue doesn't show. The size are properly reported.
>
> I investigated around and it seems that the problem belongs in the
unability
> for windows
> to treat blocksize over 65k and by default the block size is 4K.
>
> Don't know how you can solve that issue but I really need to get that
> working right.
I don't know if this will help, but it might be worth a try.  There's
a "dfree command" option that specifies a command to run to get the
free disk space:

http://www.samba.org/samba/docs/man/manpages-3/smb.conf.5.html#DFREECOMMAND

So if Windows doesn't like the block size, maybe you could lie about
the block size and then calculate the number of blocks based on the
fake block size.

There's also a "max disk size" option that may or may not make any
difference:

http://www.samba.org/samba/docs/man/manpages-3/smb.conf.5.html#MAXDISKSIZE
> Thank in advance for your time and help.
-- 
Michael Wood <esiotrot at gmail.com>

Hi

On 24 October 2012 16:41, alphe salas michels <asalas at kepler.cl>
wrote:
>
> Thank you for your proposition!
>
> I tryed to lie about the block size,  but unfortunatly windows blocksize
buffer is coded into 2 bytes (short int). so the size upper to that like Ceph
that has 1MB of block size will not be handled the proper way.
>
> My guess (it is just an assuption) is that samba can detect who connects to
it and if it is a true windows workstation /server then the samba lures the
count by multiplying the amount of blocks by 1MB / (blocksize from 1K to 64K).
In order to allow people to play with the samba "block size = "
parameter in the smb.conf.
Well, my suggestion is just a guess.  Did you try supplying your own
script for the "dfree command"?

I have not tried it myself.
> Alph? Salas
> Ingeniero T.I
>
> Kepler Data Recovery
>
> Asturias 97, Las Condes
> Santiago- Chile
> ((56 2) 362 7529
>
> asalas at kepler.cl
> www.kepler.cl
>
> On 10/24/2012 11:26 AM, Michael Wood wrote:
>
> Hi
>
> On 24 October 2012 15:41, alphe salas michels <asalas at kepler.cl>
wrote:
> >
> > Dear developement team,
> >
> > I want to share a massive storage  casted with Ceph by samba with
windows
> > workstations.
> >
> > All works well. My problem so is that in windows the ceph storage size
> > statistics are wrong. Instead of seeing a 44TB hard drive I see a
176GB hard
> > drive.
> >
> > Under linux that issue doesn't show. The size are properly
reported.
> >
> > I investigated around and it seems that the problem belongs in the
unability
> > for windows
> > to treat blocksize over 65k and by default the block size is 4K.
> >
> > Don't know how you can solve that issue but I really need to get
that
> > working right.
>
> I don't know if this will help, but it might be worth a try. 
There's
> a "dfree command" option that specifies a command to run to get
the
> free disk space:
>
> http://www.samba.org/samba/docs/man/manpages-3/smb.conf.5.html#DFREECOMMAND
>
> So if Windows doesn't like the block size, maybe you could lie about
> the block size and then calculate the number of blocks based on the
> fake block size.
>
> There's also a "max disk size" option that may or may not
make any difference:
>
> http://www.samba.org/samba/docs/man/manpages-3/smb.conf.5.html#MAXDISKSIZE
-- 
Michael Wood <esiotrot at gmail.com>