VERITAS Volume Manager 4.1 Hardware Notes HP-UX 11i v2 Manufacturing Part Number: 5991-1839 September 2005 Edition 5 Printed in the United States © Copyright 2005 - 2006 Hewlett-Packard Development Company L.P.
Legal Notices Confidential computer software. Valid license from HP required for possession, use or copying. Consistent with FAR 12.211 and 12.212, Commercial Computer Software, Computer Software Documentation and Technical Data for Commercial Items are licensed to the U.S. Government under vendor’s standard commercial license. The information contained herein is subject to change without notice.
Preface 1. Hardware Notes VERITAS Volume Manager Supported Platforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Disk Array Configurations Supported for Use with DMP . . . . . . . . . . . . . . . . . . . . . . . 9 JBOD Disk Array Support in DMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 EMC Symmetrix Disk Arrays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 DMP Coexistence with EMC PowerPath . . . . . . . . . .
Preface The VERITAS Volume Manager 4.1 Hardware Notes provides hardware information on VERITAS Volume Manager (VxVM) Release 4.1. The purpose of this guide is to provide information on hardware requirements for VERITAS Volume Manager 4.1. It also describes how to use the VxVM command line interface for administering hardware with VxVM. Detailed descriptions of the VxVM commands and utilities, their options, and details on their use are located in the VxVM manual pages.
Table 1 Typographic Conventions (Continued) Typeface Usage Examples # Superuser prompt (all shells) Not applicable \ Continued input on the following line; you do not type this character # mount -F vxfs \ /h/filesys [ ] In command synopsis, brackets indicates an optional argument. ls [ -a ] | In command synopsis, a vertical bar separates mutually exclusive arguments.
• Phone: 650-960-5111 • Email: hplicense@mayfield.hp.com For license information (Europe) contact: • Phone: +33.(0)4.76.14.15.29 • Email: codeword_europe@hp-france-gen1.om.hp.com For latest information on available patches visit: • http://itrc.hp.com For technical support visit: • http://welcome.hp.com/country/us/en/support.html HP Encourages Your Comments HP encourages your comments concerning this document. We are committed to providing documentation that meets your needs.
1 Hardware Notes This document provides hardware support information for the VERITAS Volume Manager Release 4.1 on HP-UX 11i version 2 platform.
Hardware Notes Disk Array Configurations Supported for Use with DMP select HardWare Compatibility List. The Hardware Compatibility List includes a list of supported arrays, and a list of supported arrays together with a pointer to the appropriate Tech Note. Arrays supported by the Dynamic Multipathing (DMP) feature are a subset of the arrays supported by VxVM. The following arrays can have multiple paths to the same disk.
Hardware Notes Disk Array Configurations Supported for Use with DMP JBOD Disk Array Support in DMP NOTE The Dynamic Multipathing feature works with JBOD drives only if the individual disks provide unique serial number information. If the individual disks do not provide unique serial numbers, even if the disks are configured for multipathing in hardware, Base-VXVM does not provide multipathing support. DMP supports multipathing of JBOD disk arrays that are connected to a system running Base-VXVM.
Hardware Notes Disk Array Configurations Supported for Use with DMP For the DMP functionality to work with the EMC Symmetrix disk array, the following conditions must be met: • Common Serial Number Mode should be enabled for all channels that participate in DMP. This operation should be performed by the EMC Customer Engineer before installing the VERITAS software packages. • Disable queue reset on unit attention mode must be set for all channels that participate in DMP.
Hardware Notes DMP Coexistence with EMC PowerPath If each FC10 disk system is individually connected to the host (using separate HBAs), the above mentioned feature functions correctly and as expected. HP Surestore Disk Array FC60 Although the HP Surestore Disk Array FC60 can be used as an active/active disk array in some configurations, with VERITAS Volume Manager for HP-UX it can only be used as an active/passive disk array.
Hardware Notes Dynamic LUN Expansion Table 1-3 Scenarious and Required Array Modes (Continued) PowerPath Not installed; the array is not Cx600 Not installed, but the array is Cx600 NOTE DMP Array mode libvxemc.so handles the EMC Symmetrix array. DMP handles multipathing. - DMP handle multipathing. Cx600 ASL and Cx600 APM must be installed - If you are upgrading a system to Base-VXVM 4.
Hardware Notes Dynamic LUN Expansion This facility is provided to support dynamic LUN expansion by updating disk headers and other VxVM structures to match a new LUN size. It does not resize the LUN itself. Any volumes on the device should only be grown after the device itself has first been grown. Otherwise, storage other than the device may be used to grow the volumes, or the volume resize may fail if no free storage is available. Resizing should only be performed on devices that preserve data.
Hardware Notes Extended Copy Service Extended Copy Service The Extended Copy Service feature of VxVM automatically works in tandem with the extended copy engines from array vendors. When VxVM detects that the source and destination devices are enabled for extended copy, VxVM automatically off loads copy requests to the array’s copy manager. The benefits of VxVM Extended Copy Service are: • Non-disruptive copy operations from disk to disk.
Hardware Notes Administering Array Support Library Packages 3. Install the vendor ASL that supports the ecopy feature. 4. Shutdown and reboot the system. Extended Copy Service Support for Hitachi 9900 and 9900V Arrays To implement extended copy for the Hitachi 9900 and 9900V arrays, you must create the two files, user_pwwn_file and user_luid_file, that identify the Hitachi disk identification information. To create these files, run the vxwwnluid utility that is located in /etc/vx/diag.d.
Hardware Notes Administering Array Support Library Packages • The VERITAS Technical Support site, http://support.veritas.com. Select "Volume Manager" from the Product Family menu and "Volume Manager on Unix" from the Product men. Then click on Knowledge Base Search and enter asl followed by the vendor and/or model name. Base-VXVM 4.1 allows an ASL to be added to a running VxVM system (see“Adding an ASL package” on page 18 “).
Hardware Notes Administering Array Support Library Packages NOTE Disk arrays that are supported by an ASL do not have to be connected to the system when the ASL package is installed. To find out if package (ASL_name) is already installed; enter: # swlist ASL_name You will find the ASL packages in the /mount_point/storage_foundation/veritas_enabled directory. They have the format, packagename.gz.tar. To add an ASL package , proceed as follows: 1.
Hardware Notes The DMP Administration Utility - vxdmpadm Removing an ASL Package Before removing an ASL package, first find out if the package (ASL_name) is installed; enter: # swlist ASL_name 1. To remove an ASL package, enter: # swremove ASL_name 2. If vxconfigd is active, invoke Device Discovery Layer (DDL) through the vxdctl command to allow the arrays to be reclaimed: # vxdctl enable Otherwise DDL is started automatically the next time vxconfigd is activated. 3.
Hardware Notes The DMP Administration Utility - vxdmpadm You can use the vxdmpadm utility option listctlr to list all controllers connected to disks that are attached to the host.
Hardware Notes The DMP Administration Utility - vxdmpadm c1t5d0 ENABLED -c2t5d0 Disk Disk c1t6d0 ENABLED -c2t6d0 Disk Disk c1t16d0 ENABLED -c2t16d0 Disk Disk c1t17d0 ENABLED -c2t17d0 Disk Disk c1t18d0 ENABLED -c2t18d0 Disk Disk c1t19d0 ENABLED -c2t19d0 Disk Disk c1t20d0 ENABLED -c2t20d0 Disk Disk c1t21d0 ENABLED -c2t21d0 Disk Disk c1t22d0 ENABLED -c2t22d0 Disk Disk The output display shows the paths that are connected to the controller named c1.
Hardware Notes Correcting the Effects of Swapping Paths Correcting the Effects of Swapping Paths If you accidentally or intentionally swap the paths to an array by changing the N_Port_id of the affected disks, you must use the fcmsutl(1M) command to reconfigure the disks before attempting to rediscover the VxVM configuration.
