SUBIQUITY FAILURE.（我无法创建新标签-所以我在这里大声喊叫，抱歉）
我正在将服务器从Ubuntu 18.04.4 LTS "desktop"镜像升级到20.04 LTS服务器。
/boot位于/dev/sda1上（ext4） /位于/dev/sda3上（ext4） 用户数据位于ZFS池中。
在选择现有分区并确认后，subiquity安装程序在创建/dev/sda1时始终失败。
这不可能是一个罕见的情况，重新使用（和重新格式化）原地分区吧？
我尝试保存此日志（并提交了来自三次尝试的所有日志给Canonical），但它们在U盘上无处可找，并且没有casper-rw文件（尽管设置了4GB的持久存储）。因此，很难提供数据来修复问题。
幸运的是，我有根分区和引导分区的备份，所以我将它们dd回原位以使系统再次运行。
更新：dd回根和引导分区，系统已恢复到18.04.4。
来自崩溃日志的记录：
我正在将服务器从Ubuntu 18.04.4 LTS "desktop"镜像升级到20.04 LTS服务器。
/boot位于/dev/sda1上（ext4） /位于/dev/sda3上（ext4） 用户数据位于ZFS池中。
在选择现有分区并确认后，subiquity安装程序在创建/dev/sda1时始终失败。
这不可能是一个罕见的情况，重新使用（和重新格式化）原地分区吧？
我尝试保存此日志（并提交了来自三次尝试的所有日志给Canonical），但它们在U盘上无处可找，并且没有casper-rw文件（尽管设置了4GB的持久存储）。因此，很难提供数据来修复问题。
幸运的是，我有根分区和引导分区的备份，所以我将它们dd回原位以使系统再次运行。
更新：dd回根和引导分区，系统已恢复到18.04.4。
来自崩溃日志的记录：
get_blockdev_sector_size: (log=512, phys=512)
sda logical_block_size_bytes: 512
Verifying /dev/sda1 exists
Verifying /dev/sda1 size, expecting 1023000064 bytes, found 1023000064 bytes
Running command ['sfdisk', '--dump', '/dev/sda'] with allowed return codes [0] (capture=True)
An error occured handling 'partition-sda1': ValueError - dictionary update sequence element #3 has length 1; 2 is required
finish: cmd-install/stage-partitioning/builtin/cmd-block-meta: FAIL: configuring partition: partition-sda1
TIMED BLOCK_META: 4.140
finish: cmd-install/stage-partitioning/builtin/cmd-block-meta: FAIL: curtin command block-meta
Traceback (most recent call last):
File "/snap/subiquity/1772/lib/python3.6/site-packages/curtin/commands/main.py", line 202, in main
ret = args.func(args)
File "/snap/subiquity/1772/lib/python3.6/site-packages/curtin/log.py", line 97, in wrapper
return log_time("TIMED %s: " % msg, func, *args, **kwargs)
File "/snap/subiquity/1772/lib/python3.6/site-packages/curtin/log.py", line 79, in log_time
return func(*args, **kwargs)
File "/snap/subiquity/1772/lib/python3.6/site-packages/curtin/commands/block_meta.py", line 105, in block_meta
return meta_custom(args)
File "/snap/subiquity/1772/lib/python3.6/site-packages/curtin/commands/block_meta.py", line 1878, in meta_custom
handler(command, storage_config_dict)
File "/snap/subiquity/1772/lib/python3.6/site-packages/curtin/commands/block_meta.py", line 850, in partition_handler
partition_verify(part_path, info)
File "/snap/subiquity/1772/lib/python3.6/site-packages/curtin/commands/block_meta.py", line 754, in partition_verify
verify_ptable_flag(devpath, info['flag'])
File "/snap/subiquity/1772/lib/python3.6/site-packages/curtin/commands/block_meta.py", line 733, in verify_ptable_flag
info = block.sfdisk_info(devpath)
File "/snap/subiquity/1772/lib/python3.6/site-packages/curtin/block/__init__.py", line 290, in sfdisk_info
return _sfdisk_parse(out.splitlines())
File "/snap/subiquity/1772/lib/python3.6/site-packages/curtin/block/__init__.py", line 261, in _sfdisk_parse
for item in rhs.replace(' ', '').split(',')))
ValueError: dictionary update sequence element #3 has length 1; 2 is required
dictionary update sequence element #3 has length 1; 2 is required
curtin: Installation failed with exception: Unexpected error while running command.
Command: ['curtin', 'block-meta', 'simple']
Exit code: 3
Reason: -
Stdout: start: cmd-install/stage-partitioning/builtin/cmd-block-meta: curtin command block-meta
get_path_to_storage_volume for volume partition-sda1({'device': 'disk-sda', 'size': 1023000064, 'wipe': 'superblock', 'flag': 'linux', 'number': 1, 'preserve': True, 'grub_device': False, 'type': 'partition', 'id': 'partition-sda1'})
get_path_to_storage_volume for volume disk-sda({'ptable': 'msdos', 'serial': 'Samsung_SSD_850_EVO_250GB_S2R4NX0H523042A', 'wwn': '0x5002538d40e8f355', 'path': '/dev/sda', 'preserve': True, 'name': '', 'grub_device': True, 'type': 'disk', 'id': 'disk-sda'})
Processing serial 0x5002538d40e8f355 via udev to 0x5002538d40e8f355
lookup_disks found: ['wwn-0x5002538d40e8f355', 'wwn-0x5002538d40e8f355-part3', 'wwn-0x5002538d40e8f355-part1', 'wwn-0x5002538d40e8f355-part2']
Running command ['udevadm', 'info', '--query=property', '--export', '/dev/sda'] with allowed return codes [0] (capture=True)
/dev/sda is multipath device? False
Running command ['multipath', '-c', '/dev/sda'] with allowed return codes [0] (capture=True)
/dev/sda is multipath device member? False
block.lookup_disk() returning path /dev/sda
Running command ['partprobe', '/dev/sda'] with allowed return codes [0, 1] (capture=False)
Running command ['udevadm', 'settle'] with allowed return codes [0] (capture=False)
TIMED udevadm_settle(): 0.139
devsync happy - path /dev/sda now exists
return volume path /dev/sda
Running command ['partprobe', '/dev/sda'] with allowed return codes [0, 1] (capture=False)
Running command ['udevadm', 'settle'] with allowed return codes [0] (capture=False)
TIMED udevadm_settle(): 0.127
devsync happy - path /dev/sda now exists
return volume path /dev/sda1
get_path_to_storage_volume for volume partition-sda3({'device': 'disk-sda', 'size': 32768000000, 'wipe': 'superblock', 'flag': 'linux', 'number': 3, 'preserve': True, 'grub_device': False, 'type': 'partition', 'id': 'partition-sda3'})
get_path_to_storage_volume for volume disk-sda({'ptable': 'msdos', 'serial': 'Samsung_SSD_850_EVO_250GB_S2R4NX0H523042A', 'wwn': '0x5002538d40e8f355', 'path': '/dev/sda', 'preserve': True, 'name': '', 'grub_device': True, 'type': 'disk', 'id': 'disk-sda'})
Processing serial 0x5002538d40e8f355 via udev to 0x5002538d40e8f355
lookup_disks found: ['wwn-0x5002538d40e8f355', 'wwn-0x5002538d40e8f355-part2', 'wwn-0x5002538d40e8f355-part1', 'wwn-0x5002538d40e8f355-part3']
Running command ['udevadm', 'info', '--query=property', '--export', '/dev/sda'] with allowed return codes [0] (capture=True)