The term sd stands for SCSI disk, that is to say, it means Small Computer System Interface disk. So, sda means the first SCSI hard disk. Likewise,/hda, the individual partition in the disk takes names as sda1, sda2, etc.. The active partition is indicated by an * in the middle column.

What is SDA in Ubuntu?

Show activity on this post. 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 SDA and 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 .