sfdsk: no valid root disk found, disk ID information is invalidExplanation
Disk ID information was invalid for all root disks (disks where root file system will be mounted).
Resolution
Check for improper root disk swap or connection change of I/O cables.
When the cause cannot be specified, collect investigation material including the memory dump and contact field engineers.
sfdsk: I/O error on last ACTIVE sliceExplanation
Caused a panic after an I/O error occurred on the only acitve slice in the volume.
Resolution
The following are the possibilities:
Disk failure.
I/O is not responding in the I/O root domain.
Check if the physical disk and the I/O root domain are operating normally.
sfdsk: class closed downExplanation
Caused a panic after the class was closed.
Resolution
The following are the possibilities:
Disk failure.
I/O is not responding in the I/O root domain.
An abnormality occurred in the communication between nodes in the cluster system
Check if the physical disk, the I/O root domain and the cluster system are operating normally.