# whole system locked

Nils Schuller (Nils.Schuller@t-online.de)
Tue, 12 May 1998 17:10:11 +0200

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Hi

I recently encountered real problems out of nowhere:

the xscanimage-preview crashed the whole system.

to start from the beginning:

hardware: Mustek Paragon 1200SP (firmware 1.02)
connected to Tekram DC390 which also runs
IBM SCSI-Harddisk

software: SuSE Linux 5.1 with kernel 2.0.33 and
Tekram DC390(T) V1.11-driver and
sane0.67 using
SG_BIG_BUFF=1M (thanks to Rogier Wolff)

I put the system from IDE-disk to SCSI some time ago. For some time
everything worked perfect, when suddenly, exactly at the end of a
preview-scan the whole system froze completely (don't laugh at me).
No keybord working.

I had to reset and repair a more or less corrupt filesystem :-(
It happend some more times, but only EXACTLY at the end of previewing,
the
normal scanning was fine. With option strip-height (1 or 2) enabled
previewing
works mostly correct, only one crash since. smaller strip-heights seem
safer and color preview very unsafe (more data coming?)

I have no real idea what is going on, to me it seems some kind of
timing problem? The system tries to write preview-data to disk while
the scanner still locks the SCSI-bus? How could this be avoided?

Anybody any hints?

thanks in advance

Nils

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    e-mail: Nils.Schuller@t-online.de

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