Many times we use names such as (hd0,1), (hd0,2), sda1, Sda2, and so on, but what exactly are these things and where do you see them? Below I will say my personal understanding:
About the naming of partition devices under Linux
SDA (/DEV/SDA) refers to the first hard disk itself (SATA drives are represented by SDA, while IDE drives are represented by HDA)
SDA1 represents the first hard drive 1th primary partition (where the extended partition is viewed as the primary partition)
Sda2 represents the first hard drive 2nd primary partition
Sda3 represents the first hard drive 3rd primary partition
SDA4 represents the first hard drive 4th primary partition
SDA5 represents the first hard drive 1th logical partition
Sda6 represents the first hard drive 2nd logical partition
And so on ... (if the second hard drive is represented as SDB\HDB)
Because SDA, HDA and other names are Linux under the notation, so want to see, Linux can be viewed under the command: sudo fdisk-l, there are many online on the Linux view of the partition device, a lot of search, so I do not say more. Lazy to find words, I recommend Baidu Library six methods to view the Linux hard disk usage point here
About the name of the grub partition device
In addition, the first hard drive of the system is represented by (hd0), and the first partition on it is represented by (hd0,0), which means that for the hard disk, the x and Y are counted from 0, X is the hard drive number, and Y represents the area code. Since there can only be four primary partitions, four primary partitions of the first hard disk are represented by (hd0,0) ~ (hd0,3), and logical partitions are calculated from (hd0,4), i.e. first logical partitions (hd0,4), second logical partitions (hd0,5), and so on. The hard disk of a general machine is a primary partition and the rest is a logical partition. So C disk (hd0,0), D disk (hd0,4) to express. The CD is used (CD) to indicate the first floppy drive (FD0).
If my hard disk has two primary partitions, the rest are logical partitions. The following diagram is represented by a (Hdx,y) method:
If you are unsure of the grub partition that corresponds to your hard disk partition, you can use the LS command under Grub to view the files under the partition to determine:
LS lists all of the current devices. such as (hd0,0), (hd0,1), (hd0,5), (hd0,6), etc.
LS-L lists all current devices in detail. For partitions, their label and UUID are displayed.
LS (hd0,1)/list (hd0,1) all files under the root directory of the partition.
So if you're not sure, use LS to list all the current devices, and use LS (hd0,x)/command to determine. (x needs to be changed on a per-partition basis)
