A raid 0 and sda3 question.

Bassit · 03-24-2017, 01:19 PM

Hi all, 1st time poster here..

I'm very new to Linux and cant find an answer by googling..

I have a server set up with 2x2tb drives with raid 0.

sda3 is root and has 1.9tb available space, can i use this space for storing files?
If so i would want access/permission to read the files once written on my existing account, not root..

Thanks for reading...

Keruskerfuerst · 03-24-2017, 01:50 PM

Which distro are you using?

Files, which are stored by the use, are saved to /home.
You can use approx. 90% of free space for storing data.

The read permission is set by the file permissions.

Bassit · 03-24-2017, 02:03 PM

Quote:

Originally Posted by Keruskerfuerst

Which distro are you using?

Files, which are stored by the use, are saved to /home.
You can use approx. 90% of free space for storing data.

The read permission is set by the file permissions.

Thanks for the reply..

Ubuntu 14 lts.

I am using /home at the moment but i would like to be able to use the empty space at sda3, but i have no idea how to access the drive..

Madhu Desai · 03-24-2017, 02:13 PM

Quote:

Originally Posted by Bassit

Hi all, 1st time poster here..

I'm very new to Linux and cant find an answer by googling..

I have a server set up with 2x2tb drives with raid 0.

sda3 is root and has 1.9tb available space, can i use this space for storing files?
If so i would want access/permission to read the files once written on my existing account, not root..

Thanks for reading...

Create a directory in root and set owner and group to yourself with recursive write permission.

suicidaleggroll · 03-24-2017, 02:37 PM

I don't understand what "sda3" is, how it relates to some raid 0 array mentioned in the OP, or what either of those have to do with storing some data on your filesystem. Create a directory in the location where you want it, give it the necessary permissions for your user to access it, and you're done. If you're trying to ask us where you can create this directory so that it will end up on "sda3" or whatever raid array you mentioned, we're going to need a lot more information from you (partitioning/filesystem information, raid configuration, mount locations, etc).

Bassit · 03-24-2017, 03:41 PM

Quote:

Originally Posted by suicidaleggroll

I don't understand what "sda3" is, how it relates to some raid 0 array mentioned in the OP, or what either of those have to do with storing some data on your filesystem. Create a directory in the location where you want it, give it the necessary permissions for your user to access it, and you're done. If you're trying to ask us where you can create this directory so that it will end up on "sda3" or whatever raid array you mentioned, we're going to need a lot more information from you (partitioning/filesystem information, raid configuration, mount locations, etc).

Again thanks for the reply..

Filesystem 1M-blocks Used Available Use% Mounted on
udev 12038 1 12038 1% /dev
tmpfs 2410 2 2409 1% /run
/dev/sda3 1967617 7955 1859691 1% /
none 1 0 1 0% /sys/fs/cgroup
none 5 0 5 0% /run/lock
none 12049 20 12029 1% /run/shm
none 100 1 100 1% /run/user
/dev/sda2 190 36 140 21% /boot
/dev/sda5 1785441 1329410 365315 79% /home

As i said i am very new to linux..

I am unsure as to what the use of /dev/sda3 is, so i wanted to ask if i will mess anything up by putting a folder in there.
If its ok to use the drive(?) /dev/sda3, i want to place a folder in there for storage and transfer files from /home..

Bassit · 03-24-2017, 03:44 PM

Quote:

Originally Posted by mddnix

Create a directory in root and set owner and group to yourself with recursive write permission.

Thank you for the reply..

I have no idea of how to do any of the above, but i could google all of the above steps i suppose..

suicidaleggroll · 03-24-2017, 04:08 PM

Quote:

Originally Posted by Bassit

Again thanks for the reply..

Filesystem 1M-blocks Used Available Use% Mounted on
udev 12038 1 12038 1% /dev
tmpfs 2410 2 2409 1% /run
/dev/sda3 1967617 7955 1859691 1% /
none 1 0 1 0% /sys/fs/cgroup
none 5 0 5 0% /run/lock
none 12049 20 12029 1% /run/shm
none 100 1 100 1% /run/user
/dev/sda2 190 36 140 21% /boot
/dev/sda5 1785441 1329410 365315 79% /home

As i said i am very new to linux..

I am unsure as to what the use of /dev/sda3 is, so i wanted to ask if i will mess anything up by putting a folder in there.
If its ok to use the drive(?) /dev/sda3, i want to place a folder in there for storage and transfer files from /home..

Yes that would be fine. By the way I do not see any evidence of RAID on your system, all I see is a single drive called "sda" with at least 5 partitions on it.

If you want to create a data directory on sda3, you could run as root:

Code:

mkdir /data
chown bassit:bassit /data

Replacing "bassit" with your username on the machine. That will create a directory called "data" in /, which is located on sda3, and will then change the ownership (both user and group) of that directory to your user, so you can do with it what you like.

wpeckham · 03-24-2017, 04:17 PM

What makes you think you are using raid?
Do you have a RAID controller for those drives, or had you intended to use software raid?
There seems to be a disconnect there, and I think some answers MAY clear this up a bit.

Bassit · 03-24-2017, 04:23 PM

Quote:

Originally Posted by wpeckham

What makes you think you are using raid?
Do you have a RAID controller for those drives, or had you intended to use software raid?
There seems to be a disconnect there, and I think some answers MAY clear this up a bit.

I requested the server to be set up with raid 0, no controller, software only..So i assumed it had been setup with raid 0.

Bassit · 03-24-2017, 04:26 PM

Quote:

Originally Posted by suicidaleggroll

Yes that would be fine. By the way I do not see any evidence of RAID on your system, all I see is a single drive called "sda" with at least 5 partitions on it.

If you want to create a data directory on sda3, you could run as root:

Code:

mkdir /data
chown bassit:bassit /data

Replacing "bassit" with your username on the machine. That will create a directory called "data" in /, which is located on sda3, and will then change the ownership (both user and group) of that directory to your user, so you can do with it what you like.

Thank you again, this is what i wanted to know.

Raid or no raid is fine with me, i assumed it had been setup with software raid as this is what i requested.

suicidaleggroll · 03-24-2017, 07:12 PM

The Linux software raid controller is mdadm. Any resulting arrays would be called /dev/md* (md0, md1, md127, etc). sda is a physical device, could be a hard drive, ssd, hardware raid controller, etc, but definitely not a software raid. Not to mention that a raid 0 array made up of 2x2tb drives would be 4tb, and your sda is only 2tb.

Madhu Desai · 03-25-2017, 02:15 AM

@Bassit You can create directory in root '/' partition as mentioned by suicidaleggroll in post #8. Assuming your username is bassit, for further convenience, you can also do following

Create bookmark of /data in file manager (like nautilus) for easy navigation.
If you use terminal often, then you can do this in your home directory

Code:

$ cd ~
$ mkdir data
$ sudo vim /etc/fstab
  /data /home/bassit/data none bind 0 0
$ sudo mount -a

Bassit · 03-28-2017, 07:59 AM

Quote:

Originally Posted by mddnix

@Bassit You can create directory in root '/' partition as mentioned by suicidaleggroll in post #8. Assuming your username is bassit, for further convenience, you can also do following

Create bookmark of /data in file manager (like nautilus) for easy navigation.
If you use terminal often, then you can do this in your home directory

Code:

$ cd ~
$ mkdir data
$ sudo vim /etc/fstab
  /data /home/bassit/data none bind 0 0
$ sudo mount -a

Quote:

Originally Posted by suicidaleggroll

The Linux software raid controller is mdadm. Any resulting arrays would be called /dev/md* (md0, md1, md127, etc). sda is a physical device, could be a hard drive, ssd, hardware raid controller, etc, but definitely not a software raid. Not to mention that a raid 0 array made up of 2x2tb drives would be 4tb, and your sda is only 2tb.

Thank you for this explanation, info such as this helps a complete newbie like myself..

Bassit · 03-28-2017, 08:05 AM

Quote:

Originally Posted by mddnix

@Bassit You can create directory in root '/' partition as mentioned by suicidaleggroll in post #8. Assuming your username is bassit, for further convenience, you can also do following

Create bookmark of /data in file manager (like nautilus) for easy navigation.
If you use terminal often, then you can do this in your home directory

Code:

$ cd ~
$ mkdir data
$ sudo vim /etc/fstab
  /data /home/bassit/data none bind 0 0
$ sudo mount -a

Thank you for the reply.

I currently have xfce so i'm not really having trouble finding my way around now after following suicidaleggroll's post, but i can google your instructions 1 by 1 and learn a little more from it.