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One controller not responding during upgrade

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Category:
fas-systems
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HW
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Applies to

  • FAS2650
  • DS212C Disk shelf
  • ONTAP upgrade

Issue

  • Controller not responding during upgrade
  • Boot process hangs with message Entering FM state:5 because mbFound:0 local inheadswap:0
  • Eventually, controller reboots due to no root volume found

WARNING: there do not appear to be any disks attached to the system.
No root volume found.
Rebooting... (press ctrl-c during boot to break reboot loop)
Uptime: 6m10s
System rebooting...
 

  • No disks can be seen in maintenance mode

*> disk show -v
Local System ID: 123456789

disk show: No disks attached to system.

  • Shelves and disks information is missing from SAS adapters in maintenance mode

        slot 0: SAS Host Adapter 0a (PMC-Sierra PM8070 rev. C, SAS, <UP>)
                Firmware rev:       03.08.09.00
                Base WWN:           5:00a098:00aec1a:30
                Temperature:        Not Available
                Phy State:          [0] Enabled, 12.0 Gb/s
                                    [1] Enabled, 12.0 Gb/s
                                    [2] Enabled, 12.0 Gb/s
                                    [3] Enabled, 12.0 Gb/s
                Mini-SAS HD Vendor:        Amphenol        
                Mini-SAS HD Part Number:   X66032A+A0      
                Mini-SAS HD Type:          Passive Copper (unequalized) 2m ID:01
                Mini-SAS HD Serial Number: APF16340162481
        slot 0: SAS Host Adapter 0b (PMC-Sierra PM8070 rev. C, SAS, <UP>)
                Firmware rev:       03.08.09.00
                Base WWN:           5:00a098:00aec1a:34
                Temperature:        Not Available
                Phy State:          [4] Enabled, 12.0 Gb/s
                                    [5] Enabled, 12.0 Gb/s
                                    [6] Enabled, 12.0 Gb/s
                                    [7] Enabled, 12.0 Gb/s

  • sasadmin expander_map shows correct cabling for adapter 0b but corrupted information for adapter 0a (e.g. missing shelf serial number)​​​​​​​​​​​​​​   

Expanders on channel 0a: 
Level    0: WWN 500a098007cb4815, ID  0, Serial Number '                ', Product '', Rev '', Slot A
Level    1: WWN 500a098007cb47b5, ID  0, Serial Number '                ', Product '', Rev '', Slot A

Expanders on channel 0b: 
Level    1: WWN 500a09800aec1a3f, ID  0, Serial Number ' SHFHU1736000204', Product 'DS22412IOM12E   ', Rev '0230', Slot A
Level    2: WWN 500a098007cb4811, ID  2, Serial Number ' SHFHU1739000214', Product 'DS22412IOM12A   ', Rev '0281', Slot A
Level    3: WWN 500a098007cb47a5, ID  1, Serial Number ' SHFHU1739000215', Product 'DS22412IOM12A   ', Rev '0281', Slot A​​​​​​​

  • Removing the SAS cable from adapter 0a allows the system to see disks again and boot
  • Reseating/replacing IOM module and SAS cable do not solve the issue

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