Cannot Open Powerpath. Initialization Error
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Powerpath Initialization Error Bebad00
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for Linux… LINUX: configure kdump to send kernel crash dump file to NFS server and analyse it LINUX: restore system with
Powerpath For Linux Installation And Administration Guide
mondorestore utility (part of mondorescue package) on HP Smart Array Controller powermt display dev=all VMWARE VMWARE: virtual disk performance seems to be very high and differs from other disks in virtual machine VMWARE SDK Perl: add virtual disk to virtual machine VMWARE SDK Perl: create distributed virtual portgroups with VLAN ID VMWARE SDK Perl: clone virtual machine from template https://access.redhat.com/solutions/1202593 and customize network settings (linux guest) VMWARE: network guest issue during a storage vmotion operation VMWARE: PowerPath/VE installation on ESXi 5.1 (CLI mode) VMWARE: add many shared rdm virtual disks between two or more virtual machines VMWARE: Change native multipathing algorithm on ESXi 4.1 from fixed to Round-Robin HARDWARE HW: create server's profiles on HP Virtual Connect https://www.lincvz.info/2013/02/09/linux-why-i-dont-like-powerpath-5-7-for-linux/ FlexFabric (with CLI) SITEMAP MISC AWK: how to compare two software versions LINUX: Why I don't like PowerPath for Linux… Home LINUX: Why I don't like PowerPath for Linux… February 9, 2013 9 LINUX: Why I don't like PowerPath for Linux… Tags : LinuxpowerpathRHEL6 Category : GNU/LINUX CONTEXT Because of my company migrated SAN infrastructure to a virtualized solution (EMC VPLEX Metro), I needed to test and validate PowerPath 5.7 installation on a RedHat Enterprise Linux 6 (physical) server . PowerPath is required to use efficiently two EMC array (one is local site, other is remote site). Remote paths (called X-connect) must be set in standby mode (maybe possible and difficult withlinux native multipathing), due to overhead latency. More information in a PDF (EMC web site). Here is an architecture overview : POWERPATH INSTALLATION 1) RPM downloaded seems to be relocatable : [root@santiago1 tmp]# rpm -qi EMCpower.LINUX-5.7.1.00.00-029.el6.x86_64 Name : EMCpower.LINUX Relocations: / Version : 5.7.1.00.00 Vendor: EMC, Inc. Release : 029.el
Removed the powerpath and installed it again, It required kernel rebuild and started system reboot. But system was not able to boot. Below is the error faced.ERROR: phy_unit_init: Could not open file: /tmp/ign_configure/hw.info: No such file or directory (errno = 2)ERROR: read_hw_info failed The configuration process has incurred an error, would you like to push a shell for debugging purposes? (y/[n]):Solution:When powerpath software was uninstalled, it restored the pre-ignited image script to the startup files. This caused the server boot to fail checking for ignited configuration files in /tmp directory. The backup files are saved during the post-installation when the server is ignited. In general the files should not be altered but PP package removal seems to behave differently.The start scripts which were sourcing for ignited files were removed, rescanned the hardware, and the server was fully tested without PowerPath 5.1 installed.After validation, we installed Power Path 5.1learn:/sbin/rc2.d>swlist | grep -i emc EMCpower HP.5.1.SP2_b113 PowerPathAfter installation, the power path does not work as expected and behave the same way as the earlier versionlearn:/sbin/rc2.d>sh S999emcp startUnexpected error occured.emcpmgr: internal library error (0xebad002)Error: unable to update device configuration file(s)No migrations found.learn:/sbin/rc2.d>powermt display dev=allInitialization error.After numbers of attempts with remove/install PP, We finally found the main problem. It is actually a bug with PP and from versions like 4.x it is still there. What happened was that the entry in the /etc/inittab file for PP initialization which is running BEFORE the /sbin/init.d/emcp script and loads kernel modules to the host was missing on the host. /etc/inittab should have been updated during installation, but because that bug, it was not and PP kernel modules could not load at boot.The entry below has been added to the /etc/inittab file and after reboot PPworked fine.pwr::sysinit:/sbin/emcpstartup /dev/console 2>&1 # PowerPathWe should have noticed that earlier, but found it at the end.You can find the solution on Powerlink article emc93018. Posted by Muthu Kumar at 7:06 AM La