Networker command cfglus slows down reboot on AIX server

Hi there

Wonder if it could possibly be the lus driver taking its time going through the rounds on the reboot?

Here is article esg61779 explaining the driver configuration.

Hope its useful

-Brian

How to troubleshoot lus driver problems on AIX

ID: esg61779 Use Count: 22 Solve Count: 1 Date Created: 08/27/2003 Date Modified: 12/24/2010 Related SRs: 38292904, 31231550, 28028168, 26170312, 22029874, 22021676, 21391392, 20277620, 19928874, 19758896, 19583326, 18991424, 18809764, 18014658, 16839046, 590012, 584823, 542952, 513520, 488812, 481334, 473288 Product(s): Category(ies): Status: Approved Creator: tmian Last Modifier: kbadmin Related Bugs:

CHECK THIS SOLUTION FIRST esg68798 Jukebox drivers on AIX

SOLUTION

Goal: How to troubleshoot lus driver problems on AIX Fact: AIX Fact: LUS driver Fact: Jukebox robotics driver Fix: Run the following set of commands and check displayed outputs to see if Lus nneds to be reconfigured. lslpp -h lus Fileset Level Action Status Date Time ---------------------------------------------------------------------------- Path: /usr/lib/objrepos lus 6.0.3.4 COMMIT COMPLETE 07/25/03 18:20:18 lsdev -C -l lus lus Available Legato SCSI User Interface Release nw_6_1_3_PM.Build.26 Redefine lus if need be as: mkdev -l lus lus Defined If the user is updating or adding a replacement of the existing lus driver do the following (after copying lusdd to the drivers dir.): rmdev -d lus mkdev -c port -s scsi -t lus rather than: mkdev -l lus Here is the sequence to follow with the sample output: 1. Make sure the following directories/files exist: In /usr/lib/methods, the following files should exist: cfglus ucfglus deflus lus.cat startlus The file /usr/lib/drivers/lusdd* exists. 2. Make sure the Legato driver category has been added to the AIX device configuration database. This will be apparent in the error message returned by mkdev when you try to define and make the Legato driver available: mkdev -c port -s scsi -t lus Will return the error: mkdev : 0514-520 cannot find information in the predefined device configuration database for the following : type = "lus" subclass = "scsi" class ="port" Or you can verify with the following command, which looks up the device configuration database for our driver category: odmget -q"type=lus" PdDv You should see output like this: PdDv: type = "lus" class = "port" subclass = "scsi" prefix = "lus" devid = "" base = 2 has_vpd = 0 detectable = 1 chgstatus = 0 bus_ext = 0 fru = 1 led = 1638 setno = 1 msgno = 1 catalog = "lus.cat" DvDr = "lusdd" Define = "/usr/lib/methods/deflus" Configure = "/usr/lib/methods/cfglus" Change = "" Unconfigure = "/usr/lib/methods/ucfglus" Undefine = "/usr/lib/methods/undefine" Start = "" Stop = "" inventory_only = 0 uniquetype = "port/scsi/lus" If the Legato driver category is not in the device configuration database, you can add it manually with the following command: odmadd /usr/lpp/lus/lus.add Then verify with the odmget command. 3. Make sure the driver has been defined and made available. Run lsdev -C -l lus. You should see output like this: # lsdev -C -l lus lus Available Legato SCSI User Interface Release nw_6_1_3_PM.Build.26 If that's not the case, you can manually run the script: /usr/lib/methods/startlus You should see "lus Available" when the script completes.

Well the esg61779 didn't help because the problem also exists on servers where no jukeboxes are connected.

We opened a Service Request at EMC². The problem is still under investigation. I'll post an update if we get information from EMC²

Regards
Frank

I don't have much experience with AIX, but if LUS is just used for robotic control then you could remove it from those storage nodes hosting just drives.... but perhaps EMC should be the one to say that (many years ago I was working with lus on Solaris and if I remember correctly I had to use it on storage nodes where I had only drives due to otherwise unknown HBA or something).  Not sure what lus does while you it is supposed to unload during reboot, but I believe there was lusdebug command to get it into debug mode... might be worth of checking it out and perhaps run it to see what does it do.