Unique Id: 00A0676C-DB605D3B-1C02A1
' Copyright 2000 Compaq Computer Corporation. All rights reserved
SOURCE: Compaq Computer Corporation INFORMATION BLITZ
INFORMATION BLITZ TITLE: Volume Shadowing Restriction on Multipath
HSG/HSZ Disk Partitions
DATE: December 13, 2001
INFORMATION BLITZ #: TD 2983
AUTHOR: Marc Michaud
TEL#: 603-884-1672
EMAIL: Marc.Michaud@Compaq.com
DEPARTMENT: OpenVMS Engineering
=================================================================
PRODUCT NAME(S) IMPACTED:
PRODUCT FAMILY(IES): PRODUCT NUMBERS:
Storage _x_ HSG80, HSG60, HSZ80, or HSZ70
controller
Systems ___ ________________
Networks ___ ________________
PC ___ ________________
Software _x_ OpenVMS V7.2, V7.2-1, V7.2-2,
V7.2-1H, V7.3
Other (specify) ___ ________________
PROBLEM STATEMENT:
A partition of a multipath disk on an HSG80, HSG60, HSZ80, or HSZ70
controller can be used as a member of a host-based shadow set if and
only if that disk is used exclusively for that partition. Specifically,
the remaining space on the partitioned disk cannot be used for another
logical unit that is accessed concurrently with the partition that is
a host-based shadow set member.
PROBLEM SYMPTOM:
Failure to adhere to this restriction can result in:
Problems mounting the shadow set
Reduced data availability because of the unexpected removal of shadow
set members
SOLUTION:
To insure the highest levels of availability, customers running these
versions of OpenVMS should not use more than 1 HSG/HSZ disk partition
per disk if the partition is being shadowed.
ADDITIONAL COMMENTS:
Compaq expects to remove this restriction in the future. This
restriction is documented in the V7.2-2 and V7.3 release notes.
*****************************< NOTE >***********************************
* *
* INFORMATION IN THIS DOCUMENT REPRESENTS OPERATIONAL EXPERIENCES AND *
* SUGGESTIONS BY COMPAQ OR PARTNER EMPLOYEES. COMPAQ SHALL NOT BE *
* RESPONSIBLE FOR ANY ERRORS OR OMISSIONS CONTAINED IN THIS DOCUMENT, *
* AND RESERVES THE RIGHT TO MAKE CHANGES TO IT WITHOUT NOTICE. *
* *
************************************************************************
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