Data Replication Manager HSG80 ACS Version 8.6-4P Release Notes

Common Platform Issues
Release Notes – Data Replication Manager HSG80 ACS Version 8.6-4P 9
Performance Considerations—Full Copy Operation
During full copy operations, host I/O performance will be moderately reduced, and the
length of time required for the copy operation will be longer than that for a merge
operation.
Performance Considerations—Write History Log Merge
During Write History Log merge, host I/O performance will be drastically reduced
due to the high priority given to the merge operation. The length of time required for
the merge operation will not be affected by host I/O.
SWCC and SANworks Management Appliance Limitations
The HSG80 controller does not distinguish between commands issued from in-band
command tools (SWCC, Command Scripter, and SANworks Management Appliance)
and commands issued out-of-band through the serial port. Serial port commands
should only be performed when the customer has restricted commanding from other
sources. Special care must be taken with the Management Appliance, as it periodically
issues polling commands that can interrupt serial port communications. If you will be
using the serial port on the HSG80 controller, remove the Management Appliance
from the fabric or use switch zoning to isolate the Management Appliance from the
array in which controllers are commanded through a serial port.
Future releases of Management Appliance and ACS firmware will contain
enhancements to prevent this inconvenience.
Using Switch Zoning to Prevent Crashes When Using VTDPY
Host Display
The HSG80 controller may crash when using the Display Host functionality in
VTDPY. If more than 21 connections are displayed (the equivalent of one page), the
controller will crash with a last fail code of 01932588 (cache data allocation parity
error). Compaq recommends that you use switch zoning to limit the number of
connections visible to the controller. For more information about switch zoning, refer
to the SANworks by Compaq Data Replication Manager HSG80 ACS Version 8.6-4P
Configuration Guide.