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Oracle Linux: On UEK4, SCSI Processor Device does not Enumerate after Storage Reboot (Doc ID 2671558.1)

Last updated on JULY 16, 2020

Applies to:

Linux OS - Version Oracle Linux 7.2 with Unbreakable Enterprise Kernel [4.1.12] and later
Linux x86-64

Symptoms

After kernel update from 4.1.12-112.17.3.el7uek.x86_64 to 4.1.12-124.26.10.el7uek.x86_64,  the storage which have SCSI processor device, are not visible on the server if the storage is rebooted.
The luns get enumerated only after the server is rebooted.

# lsscsi -t
[0:2:0:0] disk /dev/sda
[1:0:0:0] disk fc:0x5006016447e03ff00x010000 /dev/sdb
[1:0:0:1] disk fc:0x5006016447e03ff00x010000 /dev/sdc
[1:0:0:2] disk fc:0x5006016447e03ff00x010000 /dev/sdd
[1:0:0:3] disk fc:0x5006016447e03ff00x010000 /dev/sde
[1:0:0:4] disk fc:0x5006016447e03ff00x010000 /dev/sdf
[1:0:0:5] disk fc:0x5006016447e03ff00x010000 /dev/sdg
[1:0:0:6] disk fc:0x5006016447e03ff00x010000 /dev/sdh
[17:0:2:0] process fc:0x5002188709a048260x012400 -
[17:0:2:1] process fc:0x5002188709a048260x012400 -
[17:0:2:2] process fc:0x5002188709a048260x012400 ------------------- iscsi processor devices
[17:0:2:3] process fc:0x5002188709a048260x012400 -
[17:0:2:4] process fc:0x5002188709a048260x012400 -
[17:0:2:5] process fc:0x5002188709a048260x012400 -

At issue time, these iscsi processor devices are not seen

# lsscsi -t
[0:2:0:0] disk /dev/sda
[1:0:0:0] disk fc:0x5006016447e03ff00x010000 /dev/sdb
[1:0:0:1] disk fc:0x5006016447e03ff00x010000 /dev/sdc
[1:0:0:2] disk fc:0x5006016447e03ff00x010000 /dev/sdd
[1:0:0:3] disk fc:0x5006016447e03ff00x010000 /dev/sde
[1:0:0:4] disk fc:0x5006016447e03ff00x010000 /dev/sdf
[1:0:0:5] disk fc:0x5006016447e03ff00x010000 /dev/sdg
[1:0:0:6] disk fc:0x5006016447e03ff00x010000 /dev/sdh

Cause

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In this Document
Symptoms
Cause
Solution
References


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