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Date:      Thu, 6 Dec 2018 12:15:19 +0300
From:      Yuri Pankov <yuripv@yuripv.net>
To:        Carson Chittom <carson@wistly.net>, "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org>
Subject:   Re: can't copy files >= 1M to NFS share
Message-ID:  <f0b14b0e-ca65-1d83-1679-3ad9724a7fc2@yuripv.net>
In-Reply-To: <20181206020451.DE4E9103AC@mailuser.nyi.internal>
References:  <20181206020451.DE4E9103AC@mailuser.nyi.internal>

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From: Yuri Pankov <yuripv@yuripv.net>
To: Carson Chittom <carson@wistly.net>,
 "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org>
Message-ID: <f0b14b0e-ca65-1d83-1679-3ad9724a7fc2@yuripv.net>
Subject: Re: can't copy files >= 1M to NFS share
References: <20181206020451.DE4E9103AC@mailuser.nyi.internal>
In-Reply-To: <20181206020451.DE4E9103AC@mailuser.nyi.internal>

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Carson Chittom wrote:
> I've got an 11.2 system acting as my media server. I'm successfully exp=
orting the directory which contains the media files via NFS, so that
> they're accessible on my workstation, which is running Windows 10 Pro. =
I can read the files fine from the Windows machine using the built-in
> Microsoft NFS client, and I can create directories, new files, and so f=
orth from the Windows machine in the share.
>=20
> The issue is that I can't copy any files greater than or equal to 1M fr=
om the Windows system to the NFS share.  I confirmed this by using dd
> to create a file which is 1023k, which I was able to copy, and one whic=
h is 1024k, which I was not.  I get the same behavior whether I try to
> drag-and-drop into the NFS share, copy-and-paste, or using "copy" in th=
e Windows Command Prompt.  The error that Windows immediately gives me is=

> "Error 0x8007045D: The request could not be performed because of an I/O=
 device error."  (And again, I *don't* get this error if the file is unde=
r 1M.)
>=20
> I've done some web searches, and there's a fair amount of that particul=
ar error code--but nothing that I saw seemed directly relevant
> (mostly about timeouts...but I'm getting the error immediately).  Maybe=
 I'm just bad at Google.
>=20
> My /etc/exports is unexceptional, literally just the line:
>=20
> /usr/local/plexdata -mapall=3Dplex
>=20
> Unfortunately, I don't have another system to hand to test mounting the=
 share.  So at this point, I'm not sure where to poke. Is this something =
I
> can address from the FreeBSD side?  A limitation of the Windows NFS cli=
ent?  Some unfortunate combination of them?
>=20
> If anybody can point me in the right direction, I'd be appreciative.

FWIW, I just tried this from Windows 10 Pro (Version 1803 OS Build
17134.441) to FreeBSD-12.1 and FreeBSD 13-CURRENT, and I'm NOT seeing
the issue (actually I was able to copy a 2GB file), so apparently it's
not windows nfs client limitation.


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