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This article introduces the relevant knowledge of "what is the representation of storage devices in Linux system". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

The second representation of hard disk partition (hd [0Murn], y)

As we have mentioned earlier, there are two ways to represent the whole hard disk, one is / dev/hd [a murz], and the other is hd [0murn]

A hard disk partition must first confirm which hard drive it is in, and then confirm its location; for example, if I live in the YYY room of the XXX Hotel, I just tell someone that I am not enough in the XXX Hotel, but also tell him the YYY room, so that the person who comes to me can find me. So if we want to know a hard disk partition, we should not only know / dev/hd [a murz], but also know where he is, that is, the aforementioned statement of / dev/hd [a murz] X, after confirming that the partition is / dev/hd [a murz], we also need to use X to confirm the specific location.

In this title, we are talking about another representation (hd [0murn], y), hd [0murn] We know that this is one of the representations of hard disk, if you don't understand, please take a look at the previous thing; what does y mean here? The value of y is Xmur1 in / dev/hd [a murz] X

Use examples to understand it.

[root@localhost] # fdisk-l Disk / dev/hda: 80.0 GB, 80026361856 bytes 255heads, 63 sectors/track 9729 cylinders Units = cylinders of 16065 * 8225280 bytes Device Boot Start End Blocks Id System / dev/hda1 * 1,970 7791493 + 7 HPFS/NTFS / dev/hda2 971 9729 70356667 + 5 Extended / dev/hda5 971 2915 15623181 b W95 FAT32 / dev/hda6 2916 4131 9767488 + 83 Linux / Dev/hda7 4132 5590 11719386 83 Linux / dev/hda8 5591 6806 9767488 + 83 Linux / dev/hda9 6807 9657 22900626 83 Linux / dev/hda10 9658 9729 578308 + 82 Linux swap / Solaris

/ dev/hda1 equivalent (hd0,0)

/ dev/hda2 equivalent (hd0,1) Note: look, this is an extended partition. It cannot be mounted in Linux or Windows.

/ dev/hda5 equivalent (hd0,4)

/ dev/hda6 equivalent (hd0,5)

/ dev/hda7 equivalent (hd0,6)

/ dev/hda8 equivalent (hd0,7)

......

/ dev/hda10 is the same (hd0,9)

If there is only one hard disk in the machine, whether through / dev/hda or / dev/hdb in Linux, the method represented by hd [0murn] is hd0;, so if you list on the hard disk is

[root@localhost] # fdisk-l Disk / dev/hdb: 80.0 GB, 80026361856 bytes 255heads, 63 sectors/track 9729 cylinders Units = cylinders of 16065 * 8225280 bytes Device Boot Start End Blocks Id System / dev/hdb1 * 1,970 7791493 + 7 HPFS/NTFS / dev/hdb2 971 9729 70356667 + 5 Extended / dev/hdb5 971 2915 15623181 b W95 FAT32 / dev/hdb6 2916 4131 9767488 + 83 Linux / Dev/hdb7 4132 5590 11719386 83 Linux / dev/hdb8 5591 6806 9767488 + 83 Linux / dev/hdb9 6807 9657 22900626 83 Linux / dev/hdb10 9658 9729 578308 + 82 Linux swap / Solaris

For only one hard disk in the machine, if the partition table listed by fdisk-l is the partition table of / dev/hdb, the corresponding relationship is the same as the partition table listed by / dev/hda

/ dev/hdb1 equivalent (hd0,0)

/ dev/hdb2 equivalent (hd0,1) Note: look, this is an extended partition. It cannot be mounted in Linux or Windows.

/ dev/hdb5 equivalent (hd0,4)

/ dev/hdb6 equivalent (hd0,5)

/ dev/hdb7 equivalent (hd0,6)

/ dev/hdb8 equivalent (hd0,7)

......

/ dev/hdb10 equivalent (hd0,9)

Note: if there are two hard drives in the machine, another representation of / dev/hda is hd0,/dev/hdb, which is hd1;, so we understand the writing of (hd [0Mutual], y); so that the machine only has a single hard disk or multiple hard drives.

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