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Article #280

re: file header full on system disk

#280
From: Carl J Lydick
Date: Sat, 26 Sep 1992 19:02
21 lines
1960 bytes
In article <1992Sep25.104629.16194@infocomm.com>, mark@infocomm.com writes:
>Be VERY careful of trying to do the $EXTEND on INDEXF.SYS.   The ONLY time 
>this method has a prayer of working is immediately after a backup/restore when
>there is a good probability that the extension will be done with a single
>extent.  Using this method when there are fragmented pieces of free space
>around might end up getting your $EXTEND to use multiple of those pieces.  If
>this happens, an you end up running out of room for extension descriptors in 
>the header of INDEXF.SYS, the file system will gladly allocate an extension 
>header and put the extra extent descriptors there.

Are you sure about that?  I'd've thought that the code that prevents allocation
of extension file headers for INDEXF.SYS would've been coded pretty deeply into
the XQP.
--------------------------------------------------------------------------------
Carl J Lydick | INTERnet: CARL@SOL1.GPS.CALTECH.EDU | NSI/HEPnet: SOL1::CARL

Disclaimer:  Hey, I understand VAXen and VMS.  That's what I get paid for.  My
understanding of astronomy is purely at the amateur level (or below).  So
unless what I'm saying is directly related to VAX/VMS, don't hold me or my
organization responsible for it.  If it IS related to VAX/VMS, you can try to
hold me responsible for it, but my organization had nothing to do with it.
Technical Details
Message-ID: <1a2c3rINNik@gap.caltech.edu>
Path: arc1-ca.pugleaf.net!sparky!uunet!wupost!usc!sdd.hp.com!elroy.jpl.nasa.gov!nntp-server.caltech.edu!SOL1.GPS.CALTECH.EDU!CARL
References: <2180229E_00057EE8.009612482C133540$6_1@UK.AC.KCL.PH.IPG>,<1992Sep25.104629.16194@infocomm.com>

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Path: arc1-ca.pugleaf.net!sparky!uunet!wupost!usc!sdd.hp.com!elroy.jpl.nasa.gov!nntp-server.caltech.edu!SOL1.GPS.CALTECH.EDU!CARL
From: carl@SOL1.GPS.CALTECH.EDU (Carl J Lydick)
Newsgroups: vmsnet.internals
Subject: re: file header full on system disk
Date: 26 Sep 1992 19:02:19 GMT
Organization: HST Wide Field/Planetary Camera
Lines: 21
Message-ID: <1a2c3rINNik@gap.caltech.edu>
References: <2180229E_00057EE8.009612482C133540$6_1@UK.AC.KCL.PH.IPG>,<1992Sep25.104629.16194@infocomm.com>
Reply-To: carl@SOL1.GPS.CALTECH.EDU
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