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SubjectRe: Samba can't keep NT shares mounted
Matthew Vanecek wrote:

> I don't know who this problem belongs to, samba or Linux, but it's a
> common one, judging by the responses in my INBOX to a previous post.
> Plus, it's a fairly serious one; many applications require smb shares to
> be mounted continuously and without interruption. It's been a recurring
> problem which seems to have been pushed off to the side as not
> important, even though it's a serious flaw. Just where, I don't know
> (i.e., kernel smbfs or samba/smbmount).
>
> I know there must be *someone* who has a clue. Various proposed causes
> include password caching, the use of uid_t instead of __kernel_uid_t in
> the smbumount code (what that has to do with keeping a share mounted,
> I'm not sure), and blistering silence from those that write the code and
> know it best.
>
> Pasted below is the body of a previous unanswered post. If any of the
> experts could help, I and others would really appreciate it.
>
> Running NT 4.0 WS SP 5 and samba 2.0.5a on Linux, 2.2.12 kernel.
> Whenever I mount an NT share from Linux, it times out after an
> indeterminate period of time. This has been a continuing problem, the
> only workaround being to perform something requiring disk activity on
> the NT box, bypassing the cache (i.e., ls > /dev/null doesn't work, but
> df does). This must be done on a regular basis--every two or three
> minutes.
>
> Error messages
> me2v:reliant me2v$ ls winnt
> ls: winnt: Input/output error
>
> from /var/log/messages:
> Sep 15 20:09:14 reliant kernel: smb_trans2_request: result=-32, setting
> invalid
> Sep 15 20:10:25 reliant kernel: smb_retry: signal failed, error=-3
>
> This was after only about 1 and 1/2 hours, give or take 15 minutes.
>
> This has been a recurring problem since I moved to 2.0.3 from 1.9.18 way
> back when, and plenty of other people have had it, also. The typical
> response is that it's a password caching problem, but the password
> caching fixes, if any, haven't fixed the problem.
>
> I would like to know 1) Is there something in NT that could be causing
> this, and what that is/how to fix it, or 2) how to fix it once and for
> all from the Linux side (besides not using samba, that is). Or is there
> a smb.conf undocumented option somewhere that would help?
>
> I don't know if this is technically a Linux problem or if it's a samba
> problem, since historically smbmount has not been officially part of
> samba (although it's distributed and compiled with samba), so I wasn't
> sure who to post to. Hopefully, someone has found a fix, or at least
> knows what the problem is...
>
> Incidentally, I'm pretty sure it's not an NT service pack problem, since
> this has been a recurring problem with no service packs, and with SP3-5.
> --
> Matthew Vanecek
> Course of Study: http://www.unt.edu/bcis
> Visit my Website at http://people.unt.edu/~mev0003
> For answers type: perl -e 'print
> $i=pack(c5,(41*2),sqrt(7056),(unpack(c,H)-2),oct(115),10);'
> *****************************************************************
> For 93 million miles, there is nothing between the sun and my shadow
> except me. I'm always getting in the way of something...
>
> -
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> Please read the FAQ at http://www.tux.org/lkml/

One possible work around is to use autofs, which will automatically remount
the file system if it is lost (upon reaccess). Its also nice to cd /dir/ and
have the directory automatically mounted :].

-- Nadeem



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