Re: sgiwd93 multiple disk problem

Florian Lohoff <flo@rfc822.org> · Mon, 9 Apr 2001 21:36:32 +0200

>From a test Ryan Murray has made we do have some interesting output:

Case 1
 Data gets lost - From a diff on a large directory on ascii data 
 i can see chunks to get lost e.g. 32K (31926 byte)

Case 2 
 Data gets lost and some additional bytes get inserted:

 Example:
------------- schnipp ---------------------------------------
   tcl.h      found in  /build/buildd/blt-2.4u/debian/tcl8.0/include
-  tk.h       found in  /build/buildd/blt-2.4u/debian/tk8.0/include
[...]
-gcc -c -Wall -O6   -I. -I.  -I/build/buildd/blt-2.4u/debian/tk8.0/include -I/build/buildd/blt-2.4u/debian/tcl8.0/include bltGrPs.c
+  tk.h       found in  /build/ltGrPs.c
 gcc -c -Wall -O6   -I. -I.  -I/build/buildd/blt-2.4u/debian/tk8.0/include -I/build/buildd/blt-2.4u/debian/tcl8.0/include bltGraph.c
------------- schnapp ---------------------------------------

Case 3
 Zero bytes get inserted (2561 bytes and 3073 bytes)

 Example:

------------- schnipp ---------------------------------------
 gcc -c -Wall -O6   -I. -I.  -I/build/buildd/blt-2.4u/debian/tk8.0/include -I/build/buildd/blt-2.4u/debian/tcl8.0/include tkFrame.c
-gcc -c -Wall -O6   -I. -I.  -I/build/buildd/blt-2.4u/debian/tk8.0/include -I/build/buildd/blt-2.4u/debian/tcl8.0/include tkScrollbar.c
+gcc -c -Wall -O6   -I. -I.  -I/build/buildd/blt-2.4u
/debian/tk8.0/include -I/build/buildd/blt-2.4u/debian/tcl8.0/include tkScrollbar.c
 gcc -c -Wall -O6   -I. -I.  -I/build/buildd/blt-2.4u/debian/tk8.0/include -I/build/buildd/blt-2.4u/debian/tcl8.0/include bltTed.c
------------- schnapp ---------------------------------------

Case 4
 Garbage data gets inserted (Go and find the rootpw :) )

 Example:

------------- schnipp ---------------------------------------
 455663    4 -rw-r--r--   1 root     root         2514 Oct  6  1998 ./usr/share/doc/fltk/examples/whiteking_3.xbm
-455664    4 -rw-r--r--   1 root     root         2514 Oct  6  1998 ./usr/share/doc/fltk/examples/whiteking_4.xbm
+455664    4 -rw-r--r--   1 roo\p.Zp..]pRoot^p
+RepositoryjpÈEntrieskp.Zp..lpCVSppMakefileqp	ipldump.Srp	ipleckd.Ssp¤iplfba.Slp.kp..mpRootnp
+RepositoryopÈEntriest     root         2514 Oct  6  1998 ./usr/share/doc/fltk/examples/whiteking_4.xbm
 455665    4 -rw-r--r--   1 root     root         2213 Apr  1 12:16 ./usr/share/doc/fltk/examples/makeinclude
 455666    0 lrwxrwxrwx   1 root     root           38 Apr  1 12:33 ./usr/share/doc/fltk/examples/CubeView -> ../../../../lib/fltk/examples/CubeView
------------- schnapp ---------------------------------------

I suspect there is DMA corruption going on.

Flo
-- 
Florian Lohoff                  flo@rfc822.org             +49-5201-669912
     Why is it called "common sense" when nobody seems to have any?