节点无法启动，出现错误：启动选项加载失败

• ONTAP 9
• AFF 系统
• ASA 系统
• FAS 系统

• ONTAP 升级期间节点启动失败，出现以下错误：

Error : ERROR: [D9] Boot option loading failed

例如

?[2J?[1;1H
    ERROR: [D9] Boot option loading failed
    ?[2J?[1;1HWait BMC self-test result.
    BMC self-test: OK.
    UPI initialization.
    CPU initialization.
    Running full memory initialization

• "show devices" 从 LOADER 不显示启动设备：

LOADER-B>show devices
Device Name Description
----------- ---------------------------------------------------------
u0b.0 21H2X64_PRO, Capacity: 14981 MB Free: 14960 MB
boot_e u0b.0 alias boot device
e0M Intel I210 Gigabit Network Connection (D0-39-EA-18-5A-78)
e0S Intel I210 Gigabit Network Connection (D0-39-EA-18-5A-79)

• "boot_recovery" 失败，出现以下错误：

Terminated
varfs_backup_restore: The boot device is not mounted! Skipping /var backup.
Uptime: 2m30s