Ref: 11640007
Title: Installing Applications on Large Disk Partitions
Date: 8/15/88

Copyright 3Com Corporation, 1991.  All rights reserved.

Problem:

Parts of the CIOSYS (unrelated to the 3S/400) have caused data
corruption when applications are run on disk partitions larger
than 32 MB.  These problems have been replicated on a token ring
network (16-bit bus of the 3S/400).  Specifically:

*  Formatting the C: partition with less than 14 MB can cause the
system to corrupt the partition.   This problem will always
occur at 10 MB but may also occur at 12 MB.

*  Formatting the C: partition with more than 32 MB when it is in
a pool with another partition will cause data corruption.



Solution:

Release 1.3.1 and the PROM upgrade disk for the 3S/400 have a new
3BIO.com file to handle direct memory accessing data that could
corrupt the cache, but it is a good idea to follow the guidelines
below.

*  Format the C: partition with 14 MB or more.

*  Format the C: partition as 32 MB or put C: in its own pool,
since performance is not a concern for internal files.
(Recommendation:  Use the C: partition at 16 MB for mail, spool
files, and logs.)

*  Assign buffer pools to D:-?: or where the applications are.

