what is following number of sda?

[sajjadlove]

Hi All

i'm new in linux and have a question.i know that sda is for partition naming,but i don't know that what is following number of sda?for example sda6, sda7....

main question is:

how can i understand that this number refer to which partition?
for example sda6 is for C:\ or D:\

thanks an advanced...

[Irithori]

Hi and welcome

First of all, there is no C: or D: or drive letters in general.

There is *one* directory tree, and the devices are "mounted" to certain directories.

A whole harddisc is device /dev/sda or /dev/sdb or /dev/sdc etc.
The partitions on a disc are numbered:
/dev/sda1, /dev/sda2, etc
and on a second harddisc /dev/sdb1, /dev/sdb2, /dev/sdb3 etc

[nujinini]

Hello & Welcome

If I may add....Windows use letters to identify partitions examples: Drive C:\ and then Drive D:\ and so on.

Linux system uses the one as explained clearly by Irithori

[devils casper]

Hi and Welcome !

Don't worry about English language. Its not a native language of a lot of members here.
sda1 to sda4 are for Primary or Extended Partitions only. /dev/sda5 onwards are reserved for Logical Partitions.

You can check partition structure of your Hard disk through fdisk -l command.

su -
/sbin/fdisk -l

* Its small L in fdisk -l.

[sajjadlove]

thanks for all replies

/dev/sda5 onwards are reserved for Logical Partitions.

is it means that c:\ is sda5, d:\ is sda6 and so on?..
what about when we change for example d:\ letter to s:\?

[oz]

is it means that c:\ is sda5, d:\ is sda6 and so on?..
what about when we change for example d:\ letter to s:\?

Run the command suggested by Devils Casper above and you can see your partition layout and get a better understanding of the way drives and partition numbering work in Linux.

The newer Linux kernels see all hard drives as scsi drives, which would be the sd part, and the letter after the sd, such as letter "a", or "b" (and so on) indicate which drive.

For example:

the first drive on a system would be sda

the second drive on a system would be: sdb

The numbers attached to the end of the sda or sdb in this case would constitute the partition number that resides on each drive.

The first hard drive with its partitions would be:

sda1
sda2
sda3

The second drive with its partitions would be:

sdb1
sdb2
sdb3

[devils casper]

is it means that c:\ is sda5, d:\ is sda6 and so on?..

If your C: Drive is a Logical Partition then it will be /dev/sda5 but I don't think that first partition of your hard disk is Logical. By default, Windows OSes need Primary Partition for installation and you can not install it in Logical unless you are dual booting or using work arounds.

what about when we change for example d:\ letter to s:\?

It doesn't matter in Linux. If you change C:\ to xyz or any other driver letter, Linux won't change device name assigned to it. Linux detect partitions from Partition table directly and it has nothing to do with Windows OS except partition labels, if any.

Post the output of fdisk -l as suggested earlier.

[Schmidt]

On Linux just forget about C: and D: there are /boot /var /tmp /home and so on. if you want to mount a Windows' filesystem (or just any additional fs ) then you should try mount sd* or hd* partitions.

[devils casper]

On Linux just forget about C: and D: there are /boot /var /tmp /home and so on. if you want to mount a Windows' filesystem (or just any additional fs ) then you should try mount sd* or hd* partitions.

Correct !

Linux filesystem is different from Windows OSes. I would suggest sajjadlove to check this link.