Corrupt or Zero Byte MegaCli64 file Can Cause cellcli Output to Show Missing Disks on Exadata Platform

(Doc ID 1490765.1)

Last updated on APRIL 09, 2018

Applies to:

Exadata Database Machine X2-2 Hardware - Version All Versions to All Versions [Release All Releases]
Exadata Database Machine X2-2 Qtr Rack - Version All Versions to All Versions [Release All Releases]
Exadata Database Machine X2-8 - Version All Versions to All Versions [Release All Releases]
Oracle Exadata Hardware - Version 11.2.0.1 to 11.2.3.1.1 [Release 11.2]
Exadata Database Machine X2-2 Full Rack - Version All Versions to All Versions [Release All Releases]
Information in this document applies to any platform.

Symptoms

 Exadata storage cell reports ALL disks as not present,yet  drives can be seen by using the lsscsi command and cell continues to function.

# cellcli -e "list physicaldisk"

         24:0    E00T1M  not present
         24:1    E022E9  not present
         24:2    E01XMJ  not present
         24:3    E0116R  not present
         24:4    E0236K  not present
         24:5    E01E4S  not present
         24:6    E00YY7  not present
         24:7    E01RAL  not present
         24:8    E01GNG  not present
         24:9    E0245X  not present
         24:10   E00FLM  not present
         24:11   E01SC9  not present

# cellcli -e list physicaldisk where status!=normal


         24:0    E00T1M  not present
         24:1    E022E9  not present
         24:2    E01XMJ  not present
         24:3    E0116R  not present
         24:4    E0236K  not present
         24:5    E01E4S  not present
         24:6    E00YY7  not present
         24:7    E01RAL  not present
         24:8    E01GNG  not present
         24:9    E0245X  not present
         24:10   E00FLM  not present
         24:11   E01SC9  not present

# lsscsi

[0:0:24:0]   enclosu LSILOGIC SASX28 A.1       502E  -
[0:2:0:0]    disk    LSI      MR9261-8i        2.12  /dev/sda
[0:2:1:0]    disk    LSI      MR9261-8i        2.12  /dev/sdb
[0:2:2:0]    disk    LSI      MR9261-8i        2.12  /dev/sdc
[0:2:3:0]    disk    LSI      MR9261-8i        2.12  /dev/sdd
[0:2:4:0]    disk    LSI      MR9261-8i        2.12  /dev/sde
[0:2:5:0]    disk    LSI      MR9261-8i        2.12  /dev/sdf
[0:2:6:0]    disk    LSI      MR9261-8i        2.12  /dev/sdg
[0:2:7:0]    disk    LSI      MR9261-8i        2.12  /dev/sdh
[0:2:8:0]    disk    LSI      MR9261-8i        2.12  /dev/sdi
[0:2:9:0]    disk    LSI      MR9261-8i        2.12  /dev/sdj
[0:2:10:0]   disk    LSI      MR9261-8i        2.12  /dev/sdk
[0:2:11:0]   disk    LSI      MR9261-8i        2.12  /dev/sdl

In addition when /opt/MegaRAID/MegaCli/MegaCli64 is run it will not produce any output ,neither will sundiag collections show any output from MegaCli64 commands.

Cause

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