Asset ID:	1-72-1002264.1
Update Date:	2009-09-23
Keywords:

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Solution Type  Problem Resolution Sure

Solution  1002264.1 :   Resolving Sun StorEdge[TM] A3500FC "Could not scan controllers" issue  


PreviouslyPublishedAs
203189

Symptoms

Manipulation of array controllers in rm6 is not allowed and the error
Could not scan controllers is reported.

Though rm6 cannot manipulate the controllers; LUN's do appear
in format and lad outputs implying that the array is healthy.

This problem can occur when more than 8 LUN's are configured
on the array, but the OS is not configured correctly to recognize
more than 8 LUNs.

Resolution

If there are more than 8 LUN's configured on the array; ensure /etc/osa/rmparams is updated as follows:

 SystemMaxLunsPerController=16 (If there are more then 16 Luns then use 32)

Run the following command:

  /usr/lib/osa/bin/genscsiconf

After running genscsiconf, the host needs to be rebooted for the sd.conf to be reread allocating the additional lun support.

This should be a reconfiguration reboot to create the additional device paths now visible from the extended lun support

 #touch /reconfigure
#init 6

Check /dev/dsk and /dev/rdsk to ensure the additional luns device paths point to the rdnexus pseudo device and not to physical devices.

Relief/Workaround

none

Additional Information

none

Product
Sun StorageTek A3500 Array

Internal Comments

none

rm6, a3500, a100, format, lad, contoller, "Could not scan controllers"
Previously Published As
80338

Change History
Date: 2006-07-19
User Name: 71396
Action: Add Comment
Comment: *** This is an automatic message. This document has received 0 hits in Sunsolve in 60 days (see http://krep.emea.sun.com/stats/dochistory.cgi?docid=80338 ). If it does not receive any hit in the next 30 days, it will be automatically archived. See http://kmo.central.sun.com/VAM/ for further details. ***
Version: 0
Date: 2005-02-18
User Name: 7058
Action: Approved
Comment: Checked for dups-none located.
Expanded > = "greater than"
Enabled STM to offset preformatted text.
Review date updated.
OK to publish.
Version: 3
Date: 2005-02-18
User Name: 7058
Action: Accept
Comment:
Version: 0
Date: 2005-02-18
User Name: 103982
Action: Approved
Comment: Made some updates.. Sending back to workflow for final review
Version: 0
Date: 2005-02-10
User Name: 103982
Action: Add Comment
Comment: Updated procedure. If issue was truely Lun related and the array was using the sd driver. i.e. A3000 A3500 A1000 (not A3500FC which will use ssd). then the server will need to be rebooted to add the additional lun support. sd.conf gets read at boot. The reconfiguration option is necessary to build the device entries. Then you should check and ensure all the newly created device paths are pointing to rdnexus entries.
Version: 0
Date: 2005-02-10
User Name: 103982
Action: Accept
Comment:
Version: 0
Date: 2005-02-10
User Name: 109161
Action: Approved
Comment: ref case 64435004. based on onsite experience. could not find a solution in sunsolve.
Version: 0
Date: 2005-02-10
User Name: 109161
Action: Created
Comment:
Version: 0
Product_uuid
2a8022d4-0a18-11d6-8043-ee5a180fdb7f|Sun StorageTek A3500 Array

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