Asset ID:	1-72-1004668.1
Update Date:	2010-08-10
Keywords:

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Solution Type  Problem Resolution Sure

Solution  1004668.1 :   Sun StorEdge[TM] A3x00/A1000/rm6 - LUNS show up with 'sd' driver instead of 'rdriver'  


PreviouslyPublishedAs
206473

Symptoms
On an A3x00 or A1000 configured with LUN numbers greater than 7, LUNS whose numbers are greater than 7 show up using a different hardware path that that of LUNS 0 through 7.

This different hardware path will show up in /dev/rdsk, /dev/dsk, as
well as in 'format.'  For an example, see the following snippet from
the output of the 'format' utility:
8. c3t4d4 <Symbios-StorEDGEA3000-0205 cyl 17192 alt 2 hd 64 sec 64>
/pseudo/rdnexus@8/rdriver@4,4
9. c3t4d5 <Symbios-StorEDGEA3000-0205 cyl 17192 alt 2 hd 64 sec 64>
/pseudo/rdnexus@8/rdriver@4,5
10. c3t4d6 <Symbios-StorEDGEA3000-0205 cyl 17192 alt 2 hd 64 sec 64>
/pseudo/rdnexus@8/rdriver@4,6
11. c3t4d7 <Symbios-StorEDGEA3000-0205 cyl 17192 alt 2 hd 64 sec 64>
/pseudo/rdnexus@8/rdriver@4,7
12. c3t4d8 <Symbios-StorEDGEA3000-0205 cyl 17192 alt 2 hd 64 sec 64>
/sbus@2,0/QLGC,isp@2,10000/sd@4,8
13. c3t4d9 <Symbios-StorEDGEA3000-0205 cyl 17192 alt 2 hd 64 sec 64>
/sbus@2,0/QLGC,isp@2,10000/sd@4,9
Notice how LUNs 8 and 9 (sd@4,8 and sd@4,9) show a path without the 'rdnexus'
and 'rdriver' paths.

Resolution
This problem is usually due to the fact that the '/etc/osa/rmparams' file has the parameter "System_MaxLunsPerController" set to 8.

To fix the problem, set the value of this parameter to the correct value (typically 16 or 32) and perform a reconfiguration reboot on the system.

This problem may manifest itself after any of the following scenarios:
1.  Adding or removing patches or packages that reference the
/etc/osa/rmparams file.  This might have the effect of setting the
values in this file back to their defaults.
2.  Upgrading the 'rm6' software and forgetting to make this change to
the rmparams file.
3.  Performing the procedure to allow 16 or 32 LUN support, but leaving
out the step of editing this parameter in this file.

Product
Sun StorageTek A3000
Sun StorageTek A3500 FC Array
Sun StorageTek A3500 Array
Sun StorEdge A1000 Array

raid manager, rm6, a1000, a3x00, rdriver, rdnexus, sd
Previously Published As
25477

Change History
Date: 2007-07-02
User Name: 7058
Action: Approved
Comment: Converted to contract doc per Normalization project.
Notes for Normalizaton:
This document is referenced by: 86541
Subset Root path:
25477-->86541-->89034-->89031-->89050/86520
Project: Minnow Normalization
Version: 4
Date: 2007-07-02
User Name: 7058
Action: Update Started
Comment: converting this to a contract doc.
There is nothing in this doc to prevent it from being a contract doc.
Version: 0
Product_uuid
2a7ca41a-0a18-11d6-82f2-e96014c515ea|Sun StorageTek A3000
2a792916-0a18-11d6-8d0a-c3d03933af3c|Sun StorageTek A1000 Array
b648cdf0-efb8-4d4f-93d4-b17c1baf1935|Sun StorageTek A3500 FC Array
2a8022d4-0a18-11d6-8043-ee5a180fdb7f|Sun StorageTek A3500 Array

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