34. The disk names in Linux are alphabetical. /dev/sda is the first hard drive (the primary master), /dev/sdb is the second etc. The numbers refer to partitions, so /dev/sda1 is the first partition of the first drive.

What is sda1 and sda2 in Linux?

The partitions on each SCSI disk are represented by appending a decimal number to the disk name: sda1 and sda2 represent the first and second partitions of the first SCSI disk drive in your system. Here is a real-life example. … If the sda drive has 3 partitions on it, these will be named sda1 , sda2 , and sda3 .

What is SDA SDB Linux?

dev/sda – The first SCSI disk SCSI ID address-wise. dev/sdb – The second SCSI disk address-wise and so on. dev/scd0 or /dev/sr0 – The first SCSI CD-ROM. dev/hda – The primary disk on IDE primary controller. dev/hdb – The secondary disk on IDE primary controller.