我们有一个附带外部驱动器的小盒子来备份configuration集。 我发现问题很简单，就是在重新启动或任何未知事件时，驱动器将从/dev/sda1切换到/dev/sdb1 。
我怎样才能绕过这个或configurationfstab来尝试两个位置？
/dev/sda1 /stor ext4 defaults,noatime,noexec 0 0
你可以看到我做了相当多的debugging：
root@nsa:~# mount /stor mount: special device /dev/sda1 does not exist
正如你在下面看到的，我在写这个问题的时候做了一些debugging。
系统日志：
Jul 16 09:48:48 nsa kernel: [167416.395274] EXT4-fs warning (device sda1): __ext4_read_dirblock:908: error reading directory block (ino 2, block 0)
在umount之前#df -h ：
/dev/sda1 1.4T 185G 1.1T 15% /stor
#dmesg ：
[ 170.431715] EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: (null) [119366.019470] usb 1-1.2: USB disconnect, device number 4 [119366.297601] usb 1-1.2: new high-speed USB device number 6 using dwc_otg [119366.398979] usb 1-1.2: New USB device found, idVendor=1058, idProduct=1021 [119366.399013] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [119366.399029] usb 1-1.2: Product: Ext HDD 1021 [119366.399047] usb 1-1.2: Manufacturer: Western Digital [119366.399063] usb 1-1.2: SerialNumber: 5743415A4132343133343334 [119366.400719] usb-storage 1-1.2:1.0: USB Mass Storage device detected [119366.403826] scsi1 : usb-storage 1-1.2:1.0 [119367.398875] scsi 1:0:0:0: Direct-Access WD Ext HDD 1021 2002 PQ: 0 ANSI: 4 [119367.401608] sd 1:0:0:0: Attached scsi generic sg0 type 0 [119367.402505] sd 1:0:0:0: [sdb] 2930272256 512-byte logical blocks: (1.50 TB/1.36 TiB) [119367.403524] sd 1:0:0:0: [sdb] Test WP failed, assume Write Enabled [119367.404593] sd 1:0:0:0: [sdb] Asking for cache data failed [119367.404623] sd 1:0:0:0: [sdb] Assuming drive cache: write through [119367.407157] sd 1:0:0:0: [sdb] Test WP failed, assume Write Enabled [119367.410142] sd 1:0:0:0: [sdb] Asking for cache data failed [119367.410185] sd 1:0:0:0: [sdb] Assuming drive cache: write through [119374.143786] sdb: sdb1 [119374.146995] sd 1:0:0:0: [sdb] Test WP failed, assume Write Enabled [119374.149166] sd 1:0:0:0: [sdb] Asking for cache data failed [119374.149203] sd 1:0:0:0: [sdb] Assuming drive cache: write through [119374.149231] sd 1:0:0:0: [sdb] Attached SCSI disk [153689.349544] EXT4-fs error (device sda1): ext4_find_entry:1309: inode #2: comm rsync: reading directory lblock 0
#lsusb ：
Bus 001 Device 006: ID 1058:1021 Western Digital Technologies, Inc. Elements 2TB
正如评论中提到的那样，抓住磁盘的UUID并将其粘贴在你的fstab中;
UUID=66a7ba58-b1e2-4d91-9b5e-085064a954ab /stor ext4 defaults 0 0
（用您自己的UUID值replace）。 就像简单的ls -la /dev/disk/by-uuid （这只是一个名为UUID的符号链接集合，指向真实设备的标识符（sda，sdb等）。
lrwxrwxrwx 1 root root 9 Jul 7 08:45 66a7ba58-b1e2-4d91-9b5e-085064a954ab -> ../../sdf
具有该UUID的磁盘是/ dev / sdf，但我不必知道这一点。 该设备的位置可能会，也会改变。 它的UUID被烘焙到文件系统的目录中，除非你格式化它，否则它将永远不会改变。