💽 How to Setup Software RAID with MDADM Comand on Linux Ubuntu in 2021 💾

[@HetmanRecovery]

Content: 1:57 - Installing the mdadm utility 2:28 - Checking for disks 2:56 - Creating a new section 5:26 - How to create a RAID array 6:13 - File system for disk 6:38 - Mounting a partition 8:11 - Troubleshooting and array recovery 👍 In this video, we’ll be creating a software RAID on a Linux platform!!! We will be glad to answer any questions in comments! 👉Accidental deleting of files, formatting the hard disk, a virus attack, an operating system failure or file system failure - these are only a few problems that can be solved with programs by Hetman Software: hetmanrecovery.com/

[@TheJason13]

This process looks harder than it really is. The commands illustrated in the video are very simple, and very to-the-point. Just remember to use the correct option for RAID0, RAID1, etc. I goofed the first time and had a RAID5 with 2 drives, which only showed 1 drive available. Very good instructions!!

[@HetmanRecovery]

We are glad that our video was useful and instructive for you)

[@raven7425]

It is not OK to use dev/sda or sdb or any label like this, it is recomended to use the disk identifier because partition labels may change during boot if you conect a usb drive.

[@graceoverall]

I was thinking the same thing. 😉

[@LZeugirdor]

I think for this reason I'm going to stick to btrfs because it can pretty much manage that on its own without mount options, it just sucks that raid 5 and 6 are broken

[@MMMMMMarco]

Thank you for this comment! :-)

[@Thiccalus]

Do you mean when building the array? so instead of identifying the drives when creating the array with sdb, sdc, etc, you use the UUID in it's place?

[@MintyFreshYouTube]

A lot of this video was quite unnecessary, but you explaining how to use mdadm was absolutely invaluable to me as I was really confused with it! Thank you so much, this really helped me. To anyone watching this: Don't manually partition your drives like he did. That's being dumb. Just use a disk utility (KDE Partition Mangaer, GNOME disk utility, or GParted) instead.

[@HetmanRecovery]

you're welcome

[@leeoliver2969]

This presentation is fantastic. It solved the annoying "mdadm: cannot open /dev/sdc1: Device or resource busy " business. Thank you for making this video.

[@lo.and.behold]

This guy is awesome, subbed and liked. Best tutorial got my Raid 6 working now, deserves way more than 35k subs!

[@HetmanRecovery]

Glad you found our video useful)

[@tydlig]

In future its good if you can provide a command list instead of having to follow every row printed on your youtube video.

[@dimitristsoutsouras2712]

You used fdisk and created mbr drives. If the drives were bigger than 2tb (and nowadays they are) you could use gdisk and create uefi drives/ partitions. You also reffering to disks with sd[a,b...n] which in times of troubleshooting could be catastrophic if replacing drives and mistakenly you place it in another position. Wouldn t it be better to refer to the disks by id number? (/dev/disk/by-id)

[@HetmanRecovery]

Good afternoon, have you solved your problem?

[@dimitristsoutsouras2712]

@@HetmanRecovery I didn t have any problems. I know the procedure, but I commented as a novice user who sees the video for the first time.

[@ProjektDesigns]

@@dimitristsoutsouras2712 Hello! so since it's a recent comment hopefully I could get a response.. So when he was doing the partitions you recommend doing it via ID with gdisk instead of fdisk. would the command be: sudo gdisk /dev/disk/123456789 ? Sorry if this is a dumb question. I'm trying to look into RAID 1 so I could configure a home server on linux instead of windows.

[@austinskylines]

Thanks so much for the help!

[@HetmanRecovery]

Glad our video was useful to you)

[@wodzimierzwohn114]

Hello, I am trying to understand how to have disks monitoring. Let's imagine I will set up RAID1 out of 2x 2Tb disks. As we know it will be 2Tb disk where max amount of disks can be damaged is n-1, so 1 in my example. Now question- as NAS is device used somewhere in Rack we don't see permanently machine status. How to monitor disks with e.g. email notifications if one disk is out of order???

[@HetmanRecovery]

Good afternoon, have you solved your problem?

[@wodzimierzwohn114]

@@HetmanRecovery Good morning, not yet. It's fresh topic for me. I am considering crontab + SMART monitoring data (disk utils) + email service, but not certain is it right way to go? Any better solution cross your mind?

[@TrevorEMPF]

PLEASE CAN ANYONe EXPLAIN? Why do we have to use Command Line when the likes of Red Hat, CentOS or Feroda use a GUI instead? Isn’t Ubuntu to be more use friendly?

[@enkiimuto1041]

I CAN! Many servers are headless! They don't have monitors or even a desktop enviroment. So you'd have to use the CLI. Ubuntu Server for example, doesn't come with a graphical mode installed (you can do it, though). Main problem with the tutorial, imho is that right when he talks about security and SMART tests he switches back to CLI. If you're using regular ubuntu or any graphical OS for that matter, you can skip the entirety of disk preparation using a GUI.

[@angryapple1882]

What if I wanted to do a RAID1 with only two disk, how should I do this?

[@untoldpaine]

the same exact way he showed you except 1 instead of 5

[@enkiimuto1041]

focus on the -l 1 instead of -l 5

[@arsacode6145]

I do not have the sdd... I'm using a live persistent usb to install lubuntu studio

[@DiyintheGhetto]

Hello the problem I have is that I have one Linux system that is always online and always being written and reading from so I worry about losing the drive. Is there a way to copy the main drove to a backup drive like in a raid redundancy? I know once the drive has a os on it makes it hard to do a software raid.

[@davidnunez3523]

use a small SSD for the OS and run your two drives as a software raid where data is stored.

[@MikeSmith-xg5nw]

I'm confused by the fact that you combined 3 drives, but the new drive seems to only have the combined space of 2 of the drives. Any idea what's going on there?

[@BrazenNL]

He created a RAID 5 array.

[@2m4u]

Spare drive?

[@kyber404]

Propably because you need an even number of disks to be able to use them all. The "extras" will be put as spares.

[@ronnieolivegaming]

in a RAID 5 array, the equivalent of an entire disk is used for parity (redundancy)... So if you have three 2TB hard drives, you'll only have 4TB of useable space in a RAID 5 ...

[@mybTamaki]

Setup ist easy! Replace of demage HDDs ist the Problem!

[@ivantalalaev8573]

mdadm is essentially the problem.

[@arsacode6145]

My 500gb hard drive paired with other two hdd's of 160gb each ended up being a +- 300 gb xD hahahahahaha damn...