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Fc_err_recov

no track while AIX system dump in progress. Send to Email Address Your Name Your Email Address Cancel Post was not sent - check your email addresses! What should you look for?   This is the default (normally less ideal) situation:   # lsattr -E -l fscsi0 attach switch How this adapter is CONNECTED False dyntrk no Dynamic View all posts by Anthony Vandewerdt → This entry was posted in advice and tagged AIX, IBM AIX.

When in this state the hdisk will show a size of 0 from VIOS. 1. For multiple paths, use "chdev -l fscsi0 -a fc_err_recov=fast_fail -P". (Note A: set to fast_fail my decrease the I/O fail time due to link loss between storage and switch and allow Notify me of new posts via email. fc_err_recv=fast_fail and dyntrk=yes If link loss between storage and switch, ater 15 seconds delay, FC drives will query the device again. http://www.ibm.com/support/knowledgecenter/ssw_aix_72/com.ibm.aix.performance/fast_fail_dynamic_interaction.htm

fast_fail and dyntrk are seprate features, however, change one of them might change the other. Resolving the problem This document describes how to set up redundant VIOS support for IBM i partitions. Change the reserve for the lun / hdisk from both VIOS partitions.

fc_err_recv=fast_fail and dyntrk=no If link loss between storage and switch, ater 15 seconds delay, FC drives will query the device again. TAKING BACKUP OF DATA VG USING SAVEVG COMMAND , HOW TO BACKUP A DATAVG IN AIX ALL DOCUMENT ARE PROPERTY OF SHIVAKANT , DO NOT COPY IBM , AIX , HACMP Example, moving cable from one switch port to another will cause N_port ID change; or ISL. Practical Guide for samba configuration practical sendmail configuration Processor Folding providing sudo access for a user as a specific user PTF AIX Recover from Mirrored disk failure recovering a file from

chdev -l fscsi0 -a dyntrk=yes -P chdev -l fscsi0 -a fc_err_recov=fast_fail -P Note we are also setting dynamic tracking to yes.  This setting allows AIX to learn that the fibre channel Skip to content HomeAbout me ← Thin Provisioning BuyersGuide Knowledge sharing inIT → Don't always default todefault Posted on May 30, 2014 by Anthony Vandewerdt I once sat in a project Join 1,378 other followers Actifio Websites Actifio – Radically Simple Copy Data Management Actifio's Official Blog Actifio's YouTube Channel Michael Troiano's Blog AIX Related Blogs AIX – learn it and share HACMP QUICK REFERENCE AND INTERVIEW PREPERATION , POWERHA QUICK REFERENCE AND INTERVIEW PREPERATION HACMP BASICS HACMP CAN BE CONFIGURED IN 3 WAYS. 1.

TROUBLESHOOTING NETWORK ADAPTER ERROR , UNDERSTANDING NETWORK ERROS IN AIX , AIX NETWORK ERRORS - SOLVED ALL DOCUMENT ARE PROPERTY OF SHIVAKANT , DO NOT COPY IBM , AIX , HACMP While it’s true that in many cases the default settings may cover the most common implementations, there is no guarantee of safety in leaving everything at defaults. If no device, I/O flush back to adapter and I/O fail; if has device but scsi_id has changed,the FC driver will re-route traffic to new scsi_id. rmdev -pdev vhost1 2.

I have just one day, today, and I'm going to be happy in it. -Groucho Marx UNDERSTANDING fc_err_recov=fast_fail anddyntrk Posted: January 24, 2012 in Aix Advance Config, configuring fc in mpio, check it out Map luns/hdisk to the clients. Submit feedback to IBM Support 1-800-IBM-7378 (USA) Directory of worldwide contacts Contact Privacy Terms of use Accessibility ***** AIX * * VIO * * POWERHA * * LINUX * * BACKUP Please manually run 'savebase' before rebooting.

Yesterday is dead, tomorrow hasn't arrived yet. While you may think there is some logic in the statement, it is a flawed belief. The readme for AIX 5.2 (which applies equally to higher versions) explains all of this behaviour here: http://www-1.ibm.com/support/docview.wss?uid=isg1520readmefb4520desr_lpp_bos Share this:TwitterFacebookGoogleLinkedInPrintEmailRedditPinterestTumblrLike this:Like Loading... The change must be made prior to mapping the LUNs to IBM i, and it does not require a restart of VIOS.

love to read books . device will only track from the same HBA. If no device, I/O flush back to adapter and I/O fail; if has device but scsi_id has changed, the FC driver won't recovery.(I/O failed with PERM errors) 3. In single-path configurations, especially configurations with a single path to a paging device or tape drive, the delayed_fail default setting is recommended.

To configure the AIX fast fail feature for use with VxVM and DMP Enter the following commands for each Fibre Channel adapter or controller: # chdev -l fscsiN -a fc_err_recov=fast_fail -P After 15 seconds the path is failed and that I/O is resent down a different path.   With delayed fail, this pause can be as long as 40 seconds. Configuring the AIX fast fail feature for use with Veritas Volume Manager (VxVM) and Dynamic Multipathing (DMP) Prev Performance monitoring and tuning Next Configuring the AIX fast fail feature for use

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Watson Product Search Search None of the above, continue with my search Redundant VIOS Support VIOS Technote (troubleshooting) Problem(Abstract) This document describes the requirements for setting up and configuring redundant VIOS The default settings of fc_err_recov is "delayed_fail" which is good for single path I/O especially with a single path to paging space. chdev -dev hdisk3 -attr reserve_policy=no_reserve Issuing lspv -size from both VIOS partitions should now show the correct size. The command lspath will show the current paths.

If no device, I/O flush back to adapter and I/O fail; if has device but scsi_id has changed,the FC driver will re-route traffic to new scsi_id.(compare to 4,it will increase I/O Map luns / hdisk to the clients. The pair of chdev commands above must be repeated for each fscsiX device. You need to remove the mappings of the lun/hdisk from both vios partitions, so that they are unmapped in both places.

chdev -dev hdisk3 -attr reserve_policy=no_reserve 3. Equally there is great danger with monkeying with all the bells and whistles if you are not sure what they will do! Constructive and useful comments are very very welcome.