Further to an earlier post. User files are being corrupted as follows:
-file size remains unchanged.
-many ( thousands,) characters are changed to null. These are always
sequential and always from somewhere in file to end of file.
- checksum of a good copy (from tape) and corrupted copy diff (AS THEY SHOULD)
- any type of file can be affected.
- corrupt files appear to be random though out user dir. Sometimes all the
files in a sub-dir are affected and sometimes only one or a few.
I"VE checked various ftp sites for possible sun-patch-list to see if
any known patch for this sympton exists. None found.
Hopefully this expanded post may shed some light amongst my peer system mgrs/admins.
ANY HELP/advice/prayers or suggestions will be most appreciated!!
Has anybody experienced similiar happennings and know why or patch# to cure?
SunOS in use is 4.1.1 and user workstations are IPC's
Server of user nfs files is a 4/490 also running 4.1.1
(We are not knowingly doing anything special.)
Randy Born
System Admin trying to drain the swamp
which is rapidly rising...
A few replies but none applicable to our case.
>>>reply 1
Do you have an NC400 board in your 4/490. If so, you probably want
to turn UDP check sums on. The ether device will probably be ne0,
so you can look for it in /var/adm/messages or with the command dmesg.
Also, if you have that board, make sure to get patch 100762-02, as
it fixes a really nasty bug with oversized packets.
Ben Taylor
s9ubxt@fnma.com
>>>> NOT APPLICABLE TO OUR SETUP
>>>reply2
The strangest thing happened: programs only reading files can corrupt that file
On the physical drive nothing is wrong. just NFS went nuts.
Even worse, other workstations accessing the same part from the 3/50, will also
see a corrupted file. The problem goes away eventually if the directory is left alone
for a while, and some other directories are listed with ls(1)
I guess if the NFS server buffering mechanism is flushed somehow , all things turn back
as normal. This only happens with files larger than +100 Kbyte
Marcel Bernards
>>>> ALSO NOT APPLICABLE
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* Randy V. Born EMAIL: born@ai.iit.nrc.ca *
* Technical Officer randy@ai.iit.nrc.ca *
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