ONTAP 9.10.1へのダウングレード後にブートループでシステムがハングする

環境

問題

• ONTAPを9.10.1にダウングレードしたあとにループでシステムブートがハングする
• NVDIMMファームウェアの更新時にブートが停止する：

 ******************************* * * * Press Ctrl-C for Boot Menu. * * * ******************************* cryptomod_fips: Executing Crypto FIPS Self Tests. cryptomod_fips: Crypto FIPS self-test: 'CPU COMPATIBILITY' passed. cryptomod_fips: Crypto FIPS self-test: 'AES-128 ECB, AES-256 ECB' passed. cryptomod_fips: Crypto FIPS self-test: 'AES-128 CBC, AES-256 CBC' passed. cryptomod_fips: Crypto FIPS self-test: 'AES-128 GCM, AES-256 GCM' passed. cryptomod_fips: Crypto FIPS self-test: 'AES-128 CCM' passed. cryptomod_fips: Crypto FIPS self-test: 'CTR_DRBG' passed. cryptomod_fips: Crypto FIPS self-test: 'KDF' passed. cryptomod_fips: Crypto FIPS self-test: 'SHA1, SHA256, SHA512' passed. cryptomod_fips: Crypto FIPS self-test: 'HMAC-SHA1, HMAC-SHA256, HMAC-SHA512' passed. cryptomod_fips: Crypto FIPS self-test: 'PBKDF2' passed. cryptomod_fips: Crypto FIPS self-test: 'AES-XTS 128, AES-XTS 256' passed. cryptomod_fips: Crypto FIPS self-test: 'Self-integrity' passed. Loading NVDIMM0 firmware version 0.0.3.3 (was 0.0.1.1) Programming NVDIMM0 FW. This could take over 8 minutes. Please wait... .No FW update needed for NVDIMM0 SYSTEM REBOOT WILL OCCUR TO ACTIVATE NEW NVDIMM FIRMWARE. FWU registration for reboot.NVDIMM_FWUPDATE SUCCEEDED dd: /mroot/etc/entropy-file: Read-only file system ^C^C^C^CBoot Menu will be available. SUCCESS FWU 1st trigger point FWU performs system reboot for post firmware update. . Terminated Uptime: 42s