Mixing pass-through I/o with standard block I/O?

casler, heather (casler_heather@emc.com)
Fri, 17 Sep 1999 17:48:37 -0400

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Hello....is there a restriction on mixing pass-through I/O and standard
block I/O?
I'm using an inquiry command that goes out to identify and list the
/dev/sg"x" devices which is hanging the machine I'm using. It's a Dell
PowerEdge 2300 running 2.2.11 w/ tcp.diff patch, 2 450MHz cpu's , 512MB,
4.3GB Seagate, and attached to an external differential storage device
(Symmetrix) via AHA-2944UW. It appears to be entirely hanging the system
when the inquiry command hits /dev/sga (internal root drive)....no oops or
core dump and no hot keys are available.
Does anyone know of such a restriction?
TIA.
Heather

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