最近，我更新了我的 Arch Linux 安装。我尝试每两周这样做一次。完成后，我重新启动并收到一条错误，表明 /home（我的主分区）的依赖项失败。启动过程立即进入紧急模式。我发现我的主分区根本没有被安装。奇怪的是，我可以进入紧急模式，然后退出。之后，主分区就会安装并且系统加载得很好。
我应该提到我的主分区是BTFS而我的根分区是分机4。我的文件中有一个 HOOK /etc/mkinitcpio.conf，可以在启动时扫描 btrfs。它正在工作，我可以看到它输出正在扫描 btrfs。
它确实告诉我检查输出，journalctl -xb但是，不明白为什么我的主分区没有安装。
我读过类似的帖子，说要检查我的文件中主分区的 UUID /etc/fstab。我的 fstab 文件中的所有内容看起来都不错，但我决定放入 arch 安装 USB 并重新生成文件。这并没有解决问题。
这是我的 Journalctl -xb 输出的一部分：
-- Unit systemd-fsck@dev-disk-by\x2duuid-8244\x2d4C7C.service has begun starting up.
Jul 20 01:46:35 aurora systemd[1]: home.mount: Bound to unit dev-disk-by\x2duuid-9f171b93\x2ddd7d\x2d4353\x2d84f8\x2d79c6f673f47f.device, but unit isn't active.
Jul 20 01:46:35 aurora systemd[1]: Dependency failed for /home.
-- Subject: Unit home.mount has failed
-- Defined-By: systemd
-- Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit home.mount has failed.
--
-- The result is RESULT.
Jul 20 01:46:35 aurora systemd[1]: Dependency failed for Local File Systems.
-- Subject: Unit local-fs.target has failed
-- Defined-By: systemd
-- Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit local-fs.target has failed.
--
-- The result is RESULT.
Jul 20 01:46:35 aurora systemd[1]: local-fs.target: Job local-fs.target/start failed with result 'dependency'.
Jul 20 01:46:35 aurora systemd[1]: local-fs.target: Triggering OnFailure= dependencies.
Jul 20 01:46:35 aurora systemd[1]: home.mount: Job home.mount/start failed with result 'dependency'.
Jul 20 01:46:35 aurora systemd[1]: Reached target Network.
-- Subject: Unit network.target has finished start-up
-- Defined-By: systemd
-- Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit network.target has finished starting up.
--
-- The start-up result is RESULT.
Jul 20 01:46:35 aurora systemd[1]: Reached target Sockets.
-- Subject: Unit sockets.target has finished start-up
-- Defined-By: systemd
-- Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit sockets.target has finished starting up.
--
-- The start-up result is RESULT.
Jul 20 01:46:35 aurora systemd[1]: Starting Create Volatile Files and Directories...
-- Subject: Unit systemd-tmpfiles-setup.service has begun start-up
-- Defined-By: systemd
-- Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit systemd-tmpfiles-setup.service has begun starting up.
Jul 20 01:46:35 aurora systemd[1]: Started Emergency Shell.
-- Subject: Unit emergency.service has finished start-up
-- Defined-By: systemd
-- Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit emergency.service has finished starting up.
--
-- The start-up result is RESULT.
Jul 20 01:46:35 aurora systemd[1]: Reached target Emergency Mode.
-- Subject: Unit emergency.target has finished start-up
-- Defined-By: systemd
-- Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit emergency.target has finished starting up.
--
-- The start-up result is RESULT.
Jul 20 01:46:35 aurora systemd[1]: Reached target Timers.
-- Subject: Unit timers.target has finished start-up
-- Defined-By: systemd
-- Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit timers.target has finished starting up.
--
-- The start-up result is RESULT.
Jul 20 01:46:35 aurora systemd[1]: Mounting /home...
-- Subject: Unit home.mount has begun start-up
-- Defined-By: systemd
-- Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit home.mount has begun starting up.
Jul 20 01:46:35 aurora kernel: BTRFS info (device sdb3): disk space caching is enabled
Jul 20 01:46:35 aurora kernel: BTRFS info (device sdb3): has skinny extents
Jul 20 01:46:35 aurora systemd-fsck[305]: fsck.fat 4.1 (2017-01-24)
Jul 20 01:46:35 aurora systemd-fsck[305]: /dev/sda6: 349 files, 3156/127746 clusters
Jul 20 01:46:35 aurora systemd[1]: Started File System Check on /dev/disk/by-uuid/8244-4C7C.
-- Subject: Unit systemd-fsck@dev-disk-by\x2duuid-8244\x2d4C7C.service has finished start-up
-- Defined-By: systemd
-- Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit systemd-fsck@dev-disk-by\x2duuid-8244\x2d4C7C.service has finished starting up.
这是我的/etc/fstab文件（出于安全原因，我故意删除了其他 UUID）：
# /dev/sda5
UUID=XXXX-XXXX-XX / ext4 rw,relatime,data=ordered 0 1
# /dev/sda6
UUID=XXXX-XXXX-XX /boot/efi vfat rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,utf8,errors=remount-ro 0 2
# /dev/sdb3
UUID=9f171b93-dd7d-4353-84f8-79c6f673f47f /home btrfs rw,relatime,space_cache,subvolid=5,subvol=/ 0 0
# /dev/sda7
UUID=XXXX-XXXX-XX none swap defaults,pri=-2 0 0
这是输出lsblk -f（出于安全原因，我再次故意删除了其他 UUID）
sda
├─sda1 vfat XXXX-XXXX-XX
├─sda2
├─sda3 ntfs XXXX-XXXX-XX
├─sda4 ntfs XXXX-XXXX-XX
├─sda5 ext4 XXXX-XXXX-XX /
├─sda6 vfat XXXX-XXXX-XX /boot/efi
└─sda7 swap XXXX-XXXX-XX [SWAP]
sdb
├─sdb1
├─sdb2 ntfs Games XXXX-XXXX-XX
└─sdb3 btrfs 9f171b93-dd7d-4353-84f8-79c6f673f47f /home
如下所示，我检查了dmesg其中的一部分：
[ 2.055164] Btrfs loaded, crc32c=crc32c-intel
[ 2.055509] BTRFS: device fsid 9f171b93-dd7d-4353-84f8-79c6f673f47f devid 1 transid 83839 /de v/sdb3
[ 2.086828] PM: Image not found (code -22)
[ 2.340606] EXT4-fs (sda5): mounted filesystem with ordered data mode. Opts: (null)
[ 2.457135] systemd[1]: systemd 239 running in system mode. (+PAM -AUDIT -SELINUX -IMA -APPAR MOR +SMACK -SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTIL S +KMOD -IDN2 +IDN +PCRE2 default-hierarchy=hybrid)
[ 2.473611] systemd[1]: Detected architecture x86-64.
[ 2.478035] systemd[1]: Set hostname to <aurora>.
[ 2.557974] systemd[1]: local-fs-pre.target: Wants dependency dropin /etc/systemd/system/loca l-fs-pre.target.wants/btrfs-dev-scan.service is not a symlink, ignoring.
[ 2.567559] random: systemd: uninitialized urandom read (16 bytes read)
[ 2.567629] systemd[1]: Started Dispatch Password Requests to Console Directory Watch.
[ 2.567665] random: systemd: uninitialized urandom read (16 bytes read)
[ 2.569028] systemd[1]: Created slice system-systemd\x2dfsck.slice.
[ 2.569041] random: systemd: uninitialized urandom read (16 bytes read)
[ 2.569246] systemd[1]: Created slice system-getty.slice.
[ 2.569352] systemd[1]: Listening on udev Control Socket.
[ 2.569422] systemd[1]: Listening on udev Kernel Socket.
[ 2.569518] systemd[1]: Listening on Journal Socket (/dev/log).
[ 2.583473] EXT4-fs (sda5): re-mounted. Opts: data=ordered
[ 2.643252] systemd-journald[236]: Received request to flush runtime journal from PID 1
[ 2.729364] systemd-journald[236]: File /var/log/journal/cabc2f34b30c47f09c201422dfa880bd/sys tem.journal corrupted or uncleanly shut down, renaming and replacing.
[ 3.001682] shpchp: Standard Hot Plug PCI Controller Driver version: 0.4
[ 3.027930] rtc_cmos 00:02: RTC can wake from S4
[ 3.029174] rtc_cmos 00:02: registered as rtc0
[ 3.029191] rtc_cmos 00:02: alarms up to one month, y3k, 114 bytes nvram, hpet irqs
[ 3.029493] i801_smbus 0000:00:1f.3: enabling device (0001 -> 0003)
[ 3.029623] i801_smbus 0000:00:1f.3: SMBus using PCI interrupt
[ 3.066003] e1000e: Intel(R) PRO/1000 Network Driver - 3.2.6-k
[ 3.066005] e1000e: Copyright(c) 1999 - 2015 Intel Corporation.
[ 3.066898] e1000e 0000:00:19.0: Interrupt Throttling Rate (ints/sec) set to dynamic conserva tive mode
[ 3.084156] mousedev: PS/2 mouse device common for all mice
[ 3.086094] input: PC Speaker as /devices/platform/pcspkr/input/input7
[ 3.092504] RAPL PMU: API unit is 2^-32 Joules, 3 fixed counters, 163840 ms ovfl timer
[ 3.092506] RAPL PMU: hw unit of domain pp0-core 2^-16 Joules
[ 3.092506] RAPL PMU: hw unit of domain package 2^-16 Joules
[ 3.092507] RAPL PMU: hw unit of domain pp1-gpu 2^-16 Joules
[ 3.094356] ipmi message handler version 39.2
[ 3.097517] ipmi device interface
[ 3.102120] Linux agpgart interface v0.103
[ 3.145910] iTCO_vendor_support: vendor-support=0
[ 3.150461] iTCO_wdt: Intel TCO WatchDog Timer Driver v1.11
[ 3.150494] gpio_ich: GPIO from 436 to 511 on gpio_ich
[ 3.150597] iTCO_wdt: Found a Cougar Point TCO device (Version=2, TCOBASE=0x0460)
[ 3.153467] iTCO_wdt: initialized. heartbeat=30 sec (nowayout=0)
[ 3.189732] Adding 3288640k swap on /dev/sda7. Priority:-2 extents:1 across:3288640k SSFS
[ 3.232407] e1000e 0000:00:19.0 0000:00:19.0 (uninitialized): registered PHC clock
[ 3.235465] sdb: sdb1 sdb2 sdb3
[ 3.301961] BTRFS info (device sdb3): disk space caching is enabled
[ 3.301964] BTRFS info (device sdb3): has skinny extents
我想永久的解决方案是复制 BTRFS 分区中的所有内容，将其重新格式化为 EXT4，然后将文件放回其上。我不一定想这样做，因为这会花费很多时间，但这可能就是需要做的。
任何帮助将不胜感激，我觉得我已经尝试了我所知道的一切。
如果您需要任何其他输出或日志，请告诉我。
答案1
将-netdev选项添加到fstab“/home”条目。看来安装的依赖项是网络管理堆栈。