[Samba] [SOLVED] Ceph samba size reporting troubles

alphe salas michels asalas at kepler.cl
Wed Oct 24 13:17:41 MDT 2012

Michael Wood,
Thanks to your proposition I was able to intercept the size information 
sent to
windows by samba using the dfree command and  have displayed the proper 
The only thing I did was adding

dfree command = /usr/local/samba/bin/dfree

and in the dfree script I put :

df $1 | tail -1 | awk '{printf "%.0f %.0f",  $(NF-4),$(NF-2)}'

And suddently windows was able to calculate the proper size of my ceph 

Thank you again that helped me alot.

*Alphé Salas*
Ingeniero T.I

Descripción: 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>*

On 10/24/2012 11:45 AM, Michael Wood wrote:
> 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.
>> Alphé 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

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