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Corrupt or Zero Byte MegaCli64 file Can Cause cellcli Output to Show Missing Disks on Exadata Platform (Doc ID 1490765.1)

Last updated on OCTOBER 29, 2021

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    <SERIAL_NUMBER>  not present
         24:1    <SERIAL_NUMBER>  not present
         24:2    <SERIAL_NUMBER>  not present
         24:3    <SERIAL_NUMBER>  not present
         24:4    <SERIAL_NUMBER>  not present
         24:5    <SERIAL_NUMBER>  not present
         24:6    <SERIAL_NUMBER>  not present
         24:7    <SERIAL_NUMBER>  not present
         24:8    <SERIAL_NUMBER>  not present
         24:9    <SERIAL_NUMBER>  not present
         24:10   <SERIAL_NUMBER>  not present
         24:11   <SERIAL_NUMBER>  not present

# cellcli -e list physicaldisk where status!=normal


         24:0    <SERIAL_NUMBER>  not present
         24:1    <SERIAL_NUMBER>  not present
         24:2    <SERIAL_NUMBER>  not present
         24:3    <SERIAL_NUMBER>  not present
         24:4    <SERIAL_NUMBER>  not present
         24:5    <SERIAL_NUMBER>  not present
         24:6    <SERIAL_NUMBER>  not present
         24:7    <SERIAL_NUMBER>  not present
         24:8    <SERIAL_NUMBER>  not present
         24:9    <SERIAL_NUMBER>  not present
         24:10  <SERIAL_NUMBER>  not present
         24:11  <SERIAL_NUMBER>  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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