Hi,

I've been struggling with a 25b3 hang on a p570 building from a 53TL08SP3 image onto VIO presented disk.

lsrefcode -r lpar -m <system> --filter lpar_ids=55

pointed to:

<snip>time_stamp=12/04/2008 11:17:38,refcode=25b3,word2=03400000,fru_call_out_loc_codes=U9117.570.656FEBC-V55-C13-T1

Slot 13 was the the virtual SCSI adapter on my VIO which was erroring with some missing SAN disk. (rootvg disks were on a different VSCSI). Removing the VSCSI adapter allowed the build to run past the 25b3 led code.

I suspect that '25B3' is something like 'configuring virtual scsi'!

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LED 25B3 means "configuring virtual scsi client adapter". You should not see that for longer than 60 seconds, at which point the driver should give up the attempt to configure and log an informative message in the client partition error log. The cause of the temporary hang is likely to be that there is a host vscsi adapter defined in a VIOS partition somewhere, but that host adapter does not have any disks assigned to it. If the host adapter is not defined or the VIOS partition is not booted, then you should only see the 25B3 LED for about two seconds. Possible fixes are either assign some devices to the host adapter or remove the client and/or host adapters from the partition definition. Other causes are possible, but you will need to examine the client and VIOS partition definitions and the client and VIOS error logs.