SUMMARY: vdump: unable to read file

From: Jocelyn Guay <guay_at_cc2smtp.NRCan.gc.ca>
Date: Fri, 12 Jul 96 09:21:17 EST

     Thank you all for the excellent responses. The original message is
     appended at the end. In brief, here are the answers to my questions:
     
     1. Does anyone know what these files are used for?
     Here is Winfried Huber's answer:
     
     Don't care of the /proc directory. These are no real files. These
     pseudo files are used to access the address space of the running
     processes, e.g. for a debugger. Every process in your machine has an
     entry in /proc. So you don't have a problem here.
     
     2. How important they are?
     They are not important in the vdump procedure since they are only
     images of running processes. They should never be backed-up of
     restored.
     
     3. What I can do to fix it?
     Since it is a bug in vdump, there is a patch available. Here is Louis
     Bouchard's response:
     
     There is a patch for that (BTW, /proc is not a regular File System but
     a hook to be able to debug processes). For version 3.2D-1 of DU, it
     is OSF360-013. There should be equivalent patches for older versions.
     
     Merci Louis, je roule DU3.2d aussi. Je vais donc essayer cette
     patch... quand je l'aurai trouv‚e.
     
     4. Is my dump still good?
     Since these files should never be backed up, these failures are of no
     importance. My dumps are still good. Applying the patch would allow
     vdump to bypass this fake filesystem therefore eliminating the errors.
     
     Thanks to (in chronological order from first answer received):
     
     Clifford Krieger <ckrieger_at_psi.prc.com>
     jrozes_at_tcs.tufts.edu at internet
     Tracy McCubbin <tmccubbin_at_nccsinc.com>
     Laurent Deniel <deniel_at_worldnet.fr>
     Mr. Jolt Cola <msmith_at_quix.robins.af.mil>
     alan_at_nabeth.cxo.dec.com
     Klaus Peltsch <peltsch_at_thunderbird.auc.laurentian.ca>
     KPOOTS_at_gects.ge.com
     Guy Dallaire <dallaire_at_megatoon.com>
     Larry Griffith <larry_at_garfield.wsc.mass.edu>
     Barb Baker <baker.barb_at_tchden.org>
     Michael Matthews <matthewm_at_sgate.com>
     Karl M Majer <karl_at_usgcc.odu.edu>
     Winfried Huber <win_at_tukan.ffb.eunet.de>
     bouchard_l_at_decus.fr (Louis Bouchard - Bouygues Telecom)
     Don Newcomer <newcomer_at_dickinson.edu>
     
     Original request:
     -----------------
> I get the following errors in my vdump log file about files it can't
> read in /proc.
     
> Does anyone know what these files are used for? How important they
> are?
> What I can do to fix it?
> Is my dump still good?
>
> path : /
> dev/fset : root_domain#root
> type : advfs
> advfs id : 0x2daa5d2b.00081260.1
> vdump: Date of last level 0 dump: the start of the epoch vdump:
> Dumping directories
> vdump: Dumping 265917966 bytes, 176 directories, 1312 files vdump:
> Dumping regular files
> vdump: unable to read file <./proc/00000>; [22] Invalid argument
> vdump: unable to read file <./proc/00001>; [22] Invalid argument
> vdump: unable to read file <./proc/00008>; [22] Invalid argument
> vdump: unable to read file <./proc/00021>; [22] Invalid argument
> vdump: unable to read file <./proc/00035>; [22] Invalid argument
     
     
     Thank you very much
     
     Mr. Jocelyn Guay
     Natural Resources of Canada
     2nd floor, 580 Booth
     Ottawa, Ontario
     K1A 0E4
     Phone: (613) 943-0463
     Fax: (613) 996-2953
     Internet: guay_at_nrcan.gc.ca
     X.400:
     /s=Guay/g=Jocelyn/o=CCMAIL/prmd=GC+NRCan.RNCan/admd=Govmt.Canada/c=CA
     
     . \^ ^/
     . )_at_ _at_(
     +------oOO--(_)-------------+
     | Jocelyn Guay |
     | guay_at_nrcan.gc.ca |
     +--------------Oooo--oOO----+
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Received on Fri Jul 12 1996 - 16:17:48 NZST

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