Sun Storage 2500, 2500-M2, and 6000 Arrays: Disabling MPxIO May Cause "drive type unknown" in Output of format Command (Doc ID 1599715.1)

Last updated on NOVEMBER 14, 2013

Applies to:

Sun Storage Flexline 380 Array - Version Not Applicable and later
Sun Storage 6140 Array - Version All Versions and later
Sun Storage 6130 Array - Version All Versions and later
Sun Storage 6540 Array - Version All Versions and later
Sun Storage 6580 Array - Version All Versions and later
Information in this document applies to any platform.

Symptoms

Instead of typical disk inquiry information, the Solaris command, format is reporting several drives as <drive type unknown>.  Normally,  one would suspect a disk or data path failure. However, there are no problems anywhere.  All I/O and performance is normal. There are no error messages on the server and there are no alarms on the array. 

 

Changes

Look for any changes to the multipath configuration on either the server or the array. Another trigger may be an upgrade to Symantecs, Storage Foundation 5.0. It may also very well be that the output has been there all along and just never noticed.

Cause

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