While taking a supportsave the following error messages appeared:
[HASM-1002] 14068, SW/0 | Active | FFDC, CRITICAL, VDX6740, Error happens on service instance chassis 0: command load failed or timed out (Critical).
[RAS-1001] 14069, SW/0 | Active, INFO, VDX6740, First failure data capture (FFDC) event occurred.
Afterwards the device entered a loop of repeatedly rebooting while generating the following message on the serial console port:
ERROR : Fri Mar 29 14:11:22 2019 : srmd0 Fail to connect to WaveServer ipaddr=127.0.0.1 status=655364
Neither of the following messages appeared on the serial console port while the device was rebooting:
vsmgr: disk xfer failed