[Info-vax] New filesystem mentioned

[Robert A. Brooks]

On 5/15/2019 8:31 AM, Bob Gezelter wrote:

> An ACP process failing is bad, but does not always lead to a kernel fault. An
> XQP-like component, operating in kernel mode, will almost always cause a
> crash. Which is better? Mileage varies. Depends.

Absolutely.

For example, if the SHADOW_SERVER process does not start correctly on a system 
with SHADOWING set to 2, the SHADOW_SERVER process will bugcheck.  This is
a requirement of HBVS with Host-based minimerge (HBMM), which is V7.3-2 and beyond.

Prior to HBMM, the SHADOW_SERVER process was not required, and only was involved 
in COPY and MERGE operations, so its presence was not needed for normal operation.

HBMM changed much of the SHDRIVER and its ACP interaction such that the
SHADOW_SERVER is much more involved, starting at the mounting of a shadow set.

-- 
                  -- Rob