Error Message
devbra doesn't work after upgrading Technology Level (TL) of AIX 7.2 server from TL4 to TL5

The following variables have already been set in .omnirc file on AIX system .

OB2FORCE_AIX_FC_SCSI_VER=0
OB2CLEAR_AIX_SC_Q_CLR_SETTING=1

Cause
According to debugs , the error is occurring at SCSI command level. (SCSI Inquiry failed)

[199] 2021-02-10 14:37:43.302 ("/ma/devtool/devlist_file.c $Rev$ $Date:: $:":538)
[199] <<=== (4) } /* DevbraDoInquiry */
[199]
[ 30] CreatePhysicalDevice: Inquiry failed for device file: /dev/rmt0.1, therefore the device is ignored.

Workaround / Fix
Please set the following variables in .omnirc file on the AIX system. (MediaAgent)

OB2FORCE_AIX_FC_SCSI_VER=1
OB2CLEAR_AIX_SC_Q_CLR_SETTING=1

or

OB2FORCE_AIX_FC_SCSI_VER=2
OB2CLEAR_AIX_SC_Q_CLR_SETTING=1