CentOS 7磁盘寻找不到，卡在sulogin，造成的开机失败问题--Error getting authority...

今天早上使用内网gitlab仓库的时候，发现页面无法打开，ssh也无法连接。

到机房接上显示器，发现如下错误：

Error getting authority: Error initializing authority: Could not connect: No such file or directory (g-io-error-quark, 1)

输入root密码，进入shell界面。

按照提示，使用命令查看日志

# journalctl -xb -p3
-- Logs begin at Tue 2017-09-05 09:34:14 CST, end at Tue 2017-09-05 10:15:57 CST. --
....省略部分内容
Sep 05 09:34:18 localhost.localdomain kernel: :megaswr[ahci]: polling for interrupt status timed out for port=1, slot=0
Sep 05 09:34:18 localhost.localdomain kernel: :megasr[ahci]: warning PortReset called for port[1]
Sep 05 09:34:18 localhost.localdomain kernel: :megasr[ahci]: device on port:[1] online:[0x133] [0] milliseconds after reset
Sep 05 09:34:25 localhost.localdomain kernel: :megaswr[ahci]: polling for interrupt status timed out for port=1, slot=0
Sep 05 09:34:25 localhost.localdomain kernel: :megaswr[ahci]:Trouble port=1, slot=0
Sep 05 09:34:25 localhost.localdomain kernel: :megaswr[osl]: breakpoint called
Sep 05 09:34:25 localhost.localdomain kernel: :megasr[ahci]: Device:[2:INTEL SSDSC2BW48] NCQ:[Yes] Queue Depth:[0x20] capacity=0x37e436b0
Sep 05 09:34:25 localhost.localdomain kernel: :megasr[ahci]: Device:[3:INTEL SSDSC2BW48] NCQ:[Yes] Queue Depth:[0x20] capacity=0x37e436b0
Sep 05 09:34:25 localhost.localdomain kernel: :megasr[ahci]: Device:[4:ST9500620NS     ] NCQ:[Yes] Queue Depth:[0x20] capacity=0x3a386030
Sep 05 09:34:25 localhost.localdomain kernel: :megasr[ahci]: Device:[5:ST9500620NS     ] NCQ:[Yes] Queue Depth:[0x20] capacity=0x3a386030
Sep 05 09:34:25 localhost.localdomain kernel: :megasr: raid 10 logical drive is degraded, is not initialized, has 2 spans, and has a size of 0x6f869000 sectors
Sep 05 09:34:25 localhost.localdomain kernel: :megasr: raid 1 logical drive is online, is not initialized, has 2 drives, and has a size of 0x3a175800 sectors.
Sep 05 09:34:25 localhost.localdomain kernel: :megasr[raid_key]: [ ] RAID5 support    [ ] SAS drive support
Sep 05 09:35:57 localhost.localdomain systemd[1]: Timed out waiting for device dev-sdc1.device.

在日志中看到，dev-sdc1设备出现问题。

查看磁盘分区情况

# fdisk  -l

Disk /dev/sdb: 499.0 GB, 498999492608 bytes, 974608384 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0xfcae2784

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1            2048  1949216767   974607360   83  Linux
WARNING: fdisk GPT support is currently new, and therefore in an experimental phase. Use at your own discretion.

Disk /dev/sda: 958.0 GB, 957997907968 bytes, 1871089664 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: gpt

#         Start          End    Size  Type            Name
 1         2048       411647    200M  EFI System      EFI System Partition
 2       411648       821247    200M  Microsoft basic
 3       821248   1871087615  891.8G  Linux LVM       

Disk /dev/mapper/cl-root: 946.8 GB, 946834767872 bytes, 1849286656 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/mapper/cl-swap: 10.7 GB, 10737418240 bytes, 20971520 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

很明显，sdc没了，这才记起，当时安装系统的时候，因为多插了一块U盘，当时U盘被识别为sdb，这块磁盘被识别成了sdc。

查看fstab，证明了这一点。

# cat /etc/fstab 

#
# /etc/fstab
# Created by anaconda on Tue Aug  8 13:10:48 2017
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/mapper/cl-root     /                       xfs     defaults        0 0
UUID=a51fd6f8-a756-4e8f-ba44-5589fb99861e /boot                   xfs     defaults        0 0
UUID=7D74-6C54          /boot/efi               vfat    umask=0077,shortname=winnt 0 0
/dev/mapper/cl-swap     swap                    swap    defaults        0 0
/dev/sdc1 /data ext4 defaults 0 0

看来要把写死的磁盘名称更改为UUID。

# blkid
/dev/sdc1: UUID="ab4c28b5-1708-483c-973a-40f91d320a9d" TYPE="ext4"
...

修改后的fstab为

# cat /etc/fstab 

#
# /etc/fstab
# Created by anaconda on Tue Aug  8 13:10:48 2017
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/mapper/cl-root     /                       xfs     defaults        0 0
UUID=a51fd6f8-a756-4e8f-ba44-5589fb99861e /boot                   xfs     defaults        0 0
UUID=7D74-6C54          /boot/efi               vfat    umask=0077,shortname=winnt 0 0
/dev/mapper/cl-swap     swap                    swap    defaults        0 0
UUID=ab4c28b5-1708-483c-973a-40f91d320a9d /data ext4 defaults 0 0

尝试重启daemon,仍然弹出同样错误。

# systemctl daemon-reload
Error getting authority. Error initializing authority: Could not connect: No such file or directory  (g-io-error-quark, 1)

exit退出shell，再次弹出该错误。

Error getting authority: Error initializing authority: Could not connect: No such file or directory (g-io-error-quark, 1)

不用管，等待几秒，系统已经可以正常启动。