HP StorageWorks 1000/1500 Modular Smart Array application note Migrating to active/active controllers in Linux environments Part number: 400681–002 Second edition: October 2006
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About this document This guide provides information about migrating existing single-path and multi-path MSA1000 and MSA1500 disk arrays in Linux environments from active/passive to active/active controllers.
Preparing for the migration IMPORTANT: Before proceeding, understand the following: • Currently, the coexistence of active/active and active/passive storage systems on the same host is not supported. All active/passive storage systems connected to the host must upgrade to active/active at the same time. Likewise, all hosts connected to storage systems that are upgraded to active/active must also be upgraded. See the MSA 1000 or MSA1500 website for the latest support statements.
Step Description Check 4 Obtain the latest Support Software CD ISO image from the Software, Firmware & Drivers page of the appropriate MSA website. F On the MSA1000 or MSA1500 website: a. Click Software, Firmware & Drivers. b. Select your software/driver language. c. Select your operating system version. d. Download the ISO image to a temporary directory on a device with a CD-ROM drive and CD-burning capabilities. e.
Upgrading the MSA NOTE: Before performing these migration steps, complete all prerequisites. (See Preparing for the migration.) Step Description Check 1 Notify all system units in the MSA SAN fabric that the MSA is going offline. F 2 Back up all operating system and data volumes. F 3 Verify successful backup of the operating system and data volumes. F 4 Isolate the MSA from the network. Be sure to: F • Disable all applications (including daemons, cron jobs, and cluster services).
Step Description Check 6 Upgrade the firmware on the MSA controller(s). F Use the following items to perform the upgrade: (See Preparing for the migration.) • MSA active/active firmware files • MSA1000/1500 firmware updating guide 7 Power cycle the MSA and all attached storage enclosures. Use the following sequence: F IMPORTANT: Do not deviate from this power-cycle sequence.
Step Description Check 9 Install the QLogic HBA failover driver and other components from the latest MSA Support Software CD. (See Preparing for the migration.
Step Description Check 14 Rescan all HBAs by entering the following command: F # hp_rescan -a NOTE: If LUNs that were not visible in the cat /proc/scsi/scsi display become visible after the hp_rescan -a, do the following: a. Run the pbl utility to probe the LUNs by entering the following: # cd /opt/hp/hp_fibreutils/pbl # ./pbl_inst.sh -i b. Restart the Linux host. c. Repeat step 13 and step14. 15 Re-mount the MSA LUNs on the Linux server.
