What is Dev SDB in Linux?
Linux disks and partition names may be different from other operating systems. The first hard disk detected is named /dev/sda . The second hard disk detected is named /dev/sdb , and so on. The first SCSI CD-ROM is named /dev/scd0 , also known as /dev/sr0 .
Which command will display Uuids?
You can find the UUID of all the disk partitions on your Linux system with the blkid command. The blkid command is available by default on most modern Linux distributions. As you can see, the filesystems that has UUID are displayed.
How are / dev / sda and / dev-sdb chosen?
The designation /dev/sda and /dev/sdb can be arbitrary as you can see. From https://wiki.archlinux.org/index.php/Persistent_block_device_naming If your machine has more than one SATA, SCSI or IDE disk controller, the order in which their corresponding device nodes are added is arbitrary.
Why are device names / dev / sda chosen on boot?
If your machine has more than one SATA, SCSI or IDE disk controller, the order in which their corresponding device nodes are added is arbitrary. This may result in device names like /dev/sda and /dev/sdb switching around on each boot, culminating in an unbootable system, kernel panic, or a block device disappearing.
How to swap SDA with SDB in Linux?
To illustrate the problem further from what I found on the internet: http://ubuntuforums.org/showthread.php?t=1569238&page=2 (Reminds me of ‘Schadenfreude’) This chap seems to have found the solution, just didn’t share it (boo!): http://ubuntuforums.org/showthread.php?t=944515 And tbh, I have a potential similar hazard.
Can a permanent labelling be used on / dev / sda?
Yes, permanent labellings works where you can use them, but if a program is hardcoded to use eg. /dev/sda, this question persists. To illustrate the problem further from what I found on the internet: http://ubuntuforums.org/showthread.php?t=1569238&page=2 (Reminds me of ‘Schadenfreude’)