From: mcguire@selway.umt.edu (Charles J McGuire)
Subject: Re: LEDs flash 223 and 229 when installing new disk.  Any advise?
Organization: University of Montana
Distribution: usa
Date: Mon, 23 Nov 1992 22:29:10 GMT

In article <1992Nov23.163113.4977@ncar.ucar.edu> fredrick@acd.ucar.edu (Timothy Fredrick) writes:
>In article <1992Nov23.031709.9787@umbc3.umbc.edu> payter@umbc4.umbc.edu (Nightcrawler) writes:
>>In article <1992Nov22.192730.16039@ornl.gov> zhang@dmnds.ms.ornl.gov (Xiaoguang Zhang) writes:
>>++ I have seen the alternating 223 and 229 on LED when I tried to add
>>++ an external disk whose SCSI id was not changed and was 0 which conflicted
>>++ with one of the internal drives.  How did you connect the new drive? I
>>++ would not try to connect a new SCSI device while the machine is on. You
>>++ never know what will happen. Hope my info helps.
>>
>>    The 223-9 sequence is a normal-mode attempt to configure SCSI devices.  For
>>each SCSI I/O controller card installed in your machine, you can have, at most,
>>seven (7) SCSI'ed devices.  Each device on a given card must have a unique id
>>(address), 0 - 6.  The address 7 cannot be used.  Why?  I dunno, but that's it.
>>To solve your problem, just turn the little red (or blue) dial on the back of
>>the new drive to a number not already used.  It sounds like you are already
>>aware of that, though, since you said the addresses conflicted.  Don't worry
>>about data integrity while changing the device's SCSI address.  Heck, I've even
>>attached tape and disk drives while the machine is on, commanded cfgmgr, and
>>voila!, more DASD!  ;-)
>
>Thanks for these postings.  My problem, however, is not the SCSI address.
>I have tried two different addresses.  And actually, the disk appears to work
>fine up until I allocate it's space to filesystems.  With the disk in the
>system and configured as part of rootvg, I can reboot many times without
>incident.  The symptom of the flashing 223-9 sequence only occurs after I
>allocate the space and then reboot.
>
>Some have suggested it is an AIX bug involving large external disk drives
>greater than 1GB.  Can someone confirm this?  Would it be a bug that would
>be fixed by AIX 3.2.3?  We are running AIX 3.2.0.
>
>Another person suggested I need to reset the NVRAM by removing the battery.
>Is there a way to reset the NVRAM without removing the battery?
>
There are no bugs that I'm aware of on the size of an external drive. So
far I have 1.2G, 1.5G and 2.4G extern drives on AIX 3.2 systems with no
problems. Some systems have several 2.4G external drives. I've run them
all on 220's, 320's, 340's, 350's and 550's. I strongly advise against
messing with the scsi bus while the system is running.

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( Charlie McGuire              |       Tel.  : (406) 243-4618             )
( Research Sys Mgr             |       Fax   : (406) 243-4076             )
( The University of Montana    |                                          )
( Computer Science Dept        |       E-Mail: mcguire@huckle.cs.umt.edu  )
( SS409                        |                                          )
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