problem with dd command or maybe AFS problem

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Old 08-25-2006
problem with dd command or maybe AFS problem

Hi, folks.

Sorry for bothering, but maybe someone could help me please.

The problem is the following:
there is some script that copies files from local file system to AFS. The copying is performed with dd command.
The script copies data into some AFS volumes.
The problem appeared with one volume.

Before I thought (and I could see it is so) that if we copy some file into AFS, and quota can be exceeded, dd fails (dd: write error: Disk quota exceeded), but this copied data (any part of it) will not be kept in AFS.
That is if "fs q" showed 80% used before dd, it shows 80% used after failure of dd.

In my case:
before dd we had 95%used, one file (about 40MB) is copied, dd failed, I receive only "afs: failed to store file (over quota)", and "fs q" shows 100% used.
And I see that part of the copied file data is kept on AFS.
The problem is this script is called in other script, and that wrapper script cannot complete in such case.

I'm sorry, maybe I explained it too mazy.

Thanks in advance.

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KRB.EXCL(5)							AFS File Reference						       KRB.EXCL(5)

krb.excl - Lists exclusions for mapping kerberos principals to AFS identities DESCRIPTION
/etc/openafs/server/krb.excl is an optional file that resides on an OpenAFS server and is used to list exceptions to the algorithm of mapping kerberos principals to AFS identities. It contains the name of one or more principals; each principal should be on a line by itself. If a principal appears in this file, that principal will never be recognized by an OpenAFS server as a local identity, even if the realm is specified as a local realm in krb.conf(5). The principal names specified in this file must include the realm, and should be in Kerberos 4 format. That is, specify "user.inst@REALM", not "user/inst@REALM", "user.inst", nor "user/inst". RATIONALE
It is possible to use the krb.conf(5) configuration file to specify that multiple Kerberos realms can be considered `local' realms by OpenAFS fileservers, and those realms can be used nearly interchangeably. A site may list "FOO.EXAMPLE.COM" and "BAR.EXAMPLE.COM" to allow users to access AFS by using Kerberos tickets from either "FOO.EXAMPLE.COM" or "BAR.EXAMPLE.COM", and be treated as AFS users local to that cell. In many setups, one realm is really a `local' realm that is managed by the AFS administrators, and another `foreign' realm is specified in krb.conf that is managed by someone else, but in the same organization. In such a case, the principal names for users are the same, so users should be able to use either realm to authenticate to AFS. However, the principals for administrators are not the same between the two realms, and so the administrators in the `foreign' realm should not be considered AFS administrators. Specifying the administrator principals in the `foreign' realm prevents this, but still allows users to use either realm. EXAMPLES
The realms "FOO.EXAMPLE.COM" and "AD.EXAMPLE.COM" are configured to both be local realms, but "AD.EXAMPLE.COM" should not be used by AFS administrators. The AFS administrators are "admin" and "smith.admin". krb.excl contains: admin@AD.EXAMPLE.COM smith.admin@AD.EXAMPLE.COM Now if someone authenticates with tickets for "smith/admin@AD.EXAMPLE.COM", they will not be recognized as the "smith.admin" AFS identity. However, "smith@AD.EXAMPLE.COM" will be treated as the "smith" AFS identity, and "smith/admin@FOO.EXAMPLE.COM" will still be treated as "smith.admin". SEE ALSO
krb.conf(5) COPYRIGHT
Copyright 2010 Sine Nomine Associates This documentation is covered by the BSD License as written in the doc/LICENSE file. This man page was written by Andrew Deason for OpenAFS. OpenAFS 2012-03-26 KRB.EXCL(5)

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