A File Update on an appliance may lead to the error message "raid array sub-optimal". This can occur because LMI periodically executes a verification operation for the RAID storage. If the upgrade is initiated when the verification is ongoing then LMI detects the array is sub-optimal. When the verification process occurs the write-cache is automatically disabled by the RAID controller. The write-cache greatly enhances disk I/O performance so it is justified for the array to be considered sub-optimal when the verify operation is executing. To proceed with the software update use the procedure given below.

1. SSH to the appliance and log in as ”toor”.

2. Run this command:

$ tw_cli maint verify c0 u0 stop

This will stop the verify operation and allow the upgrade.

3. Once the upgrade has completed, you can restart the verify operation with this command:

$ tw_cli maint verify c0 u0