Technical Knowledge Base

Controllers not powering on

Problem

System will not power on.

Possible Cause:

System power outage
Controller failover scenario
Controller showing bad block entries
Dirty CACHE
Firmware mismatch

Resolution:

Scenario 1 - bad blocks on a LUN

  1. Allow the system to come up to a CLI prompt
  2. Enter a shell from the CLI prompt
su exec sh
  1. Execute the raidtool command to determine which LUN has the bad blocks
raidtool

badblocks.JPG

RAID LUN 0 contains 47759 lost blocks

  1. Clear the bad blocks from the LUN
raidtool -W <LUN#>

example: raidtool -W 0

Scenario 2 - Dirty CACHE

  1. Allow the system to come up to a CLI prompt
  2. From the CLI prompt run clearlostdata
clearlostdata

After both of these scenarios it is paramount that the customer checks the integrity of their data!

Scenario 3 - Firmware mismatch on the controllers

  1. In the event that there is a firmware mismatch reported and the array will not come online, we can set a variable to ignore this for the sake of progressing through troubleshooting.

fw_mismatch.JPG

  1. Allow the array to boot to a point where you see "press Ctrl+p for a shell"
  2. Once in the shell, set the environment variable to ignore the f/w mismatch
setenv EQL_VERSION_BYPASS 1