File size limit

[alex992]

Is there any limit for single SMB file to 16 TB?

 

[Davvo]

Afaik, your hard limit is the free space of the pool.

 

[jgreco]

Afaik, your hard limit is the free space of the pool.

Wasn't the question. The question was about SMB. I don't believe there is any particular limit on modern Samba/SMB for filesizes, and I'd be shocked if it was 16TB. That sounds like Windows Server 2003 and NTFS, which did have some sort of limit like that. Since it is now almost twenty years later, and filesystem code and servers are both 64-bit capable these days, I doubt there's a limit you're likely to reach.

 

[alex992]

I thing there is limit or bug again for SMB, cannot copy file over 16 TB, there was thread about before, but solution is not working any more.

Huge file copy fails every time

Hi, we are running TrueNAS Core 12.0-U5 with 11 8TB WD Red in a Z2 configuration. Intel(R) Xeon(R) CPU E3-1220 V2 @ 3.10GHz 32GiB ECC RAM No matter what settings we are trying (compression/no compression, sector size, Atime on/off) we struggle copying a 20TB vhdx file to the SMB shared folder...

www.truenas.com

Any ideas ?

 

[jgreco]

but solution is not working any more.

Are you referring to the protocol = SMB2_02 thing?

 

[alex992]

I am referring to previous threads with looks like same issue, where 16TB is limit for single file. Maybe versions of SMB are not issue, then what is issue? Bug?

 

[jgreco]

what is issue? Bug?

I would say that it is the bug known variously as SMB or CIFS. But that's just me, lifelong UNIX bigot.

I am referring to previous threads with looks like same issue, where 16TB is limit for single file.

Well, then, my suggestion would be to actually try the suggested fix in the thread you quoted, and see if it works.

 

[alex992]

No, suggested fix is not working. Trying to copy single file over 16 TB and it is stopping at 15.9 TB. 3 exact same TrueNAS 13.0 servers with same issue. smaller file no problem.

 

[jgreco]

@anodos , got any ideas? I'm definitely not the right person for SMB issues.

 

[alex992]

I think for Enterprise level software and ZFS file system to have that type (limit size) unresolved bug is not good. If its bug.

 

[jgreco]

I think for Enterprise level software and ZFS file system to have that type (limit size) unresolved bug is not good. If its bug.

You're free to think what you like. The ZFS file system has no such bug, and many people have files that are much larger than a mere 16TB. It's more likely that there's a problem with Samba, or negotiation with your PC client. Either way, TrueNAS is fundamentally a collection of free software projects (FreeBSD, ZFS, Samba in this case) and occasionally there can be interoperability problems. This is no longer 1988, it's not basic NFS, and there are a lot of layers of complexity in the software stacks on each end of a connection.