HP 4400 Software Manual page 73

If an event occurs that causes a second resynchronization while the upgrade resynchronization is
still in progress, the controller will terminate with a code of 0b 08 01 00. The following events
cause the controller to resysnchronize automatically:
Initialization of the array
Debug flags set through the command line interface or WOCP
Disk group hardware problem on a Vraid1 virtual disk, or attempted reconnection of a disk
when there is a disk group hardware problem
Bad Block Replacement (BBR) performed on a disk
Every effort should be made to ensure that these events do not occur during the upgrade process.
If controller termination occurs due to multiple resynchronizations, contact your HP-authorized
service representative for assistance.
Multiple resynchronizations 73