mdadm.conf file needed? How to create and where?
I'm running ubuntu mate 18.04. My system is on an nvme. I had a 4TB HD with all my back ups along with my plex media. I got a second identical HD for Christmas and used it to create a raid1 array with missing (the original HD), then copied the data from orig. HD to the raid, then added the orig.HD to the raid and it is building/repairing the raid currently.
I used the DISKS GUI to mark the array for auto mount.. that created an entry if fstab. The only thing I can think of I am unsure about is the mdadm.conf file. The many guides I have read show creating it using: mdadm --detail --scan --verbose >> /etc/mdadm.conf. When the program was installed it created its own mdadm.conf file as /etc/mdadm/mdadm.conf but all I see in it are comment lines.
A few examples I have read show creating the file in the mdadm directory but most show creating it in etc not the mdadm sub-directory. That's the history.. my questions... I assume the file is needed (even though I think the array would mount on reboot) in case it ever needs to repair. Do I create it using the "mdadm --detail --scan --verbose >> /etc/mdadm.conf" command? Does it matter if the file is in etc or the sub-directory of mdadm? Should I remove or rename the existing mdadm.conf file to prevent conflicts? Thanks for the insight.
raid mdadm mirrors
edited Dec 31 '18 at 13:48
George Udosen
20.7k94569
asked Dec 31 '18 at 13:26
D SongwriterD Songwriter
32
add a comment |
I'm running ubuntu mate 18.04. My system is on an nvme. I had a 4TB HD with all my back ups along with my plex media. I got a second identical HD for Christmas and used it to create a raid1 array with missing (the original HD), then copied the data from orig. HD to the raid, then added the orig.HD to the raid and it is building/repairing the raid currently.
I used the DISKS GUI to mark the array for auto mount.. that created an entry if fstab. The only thing I can think of I am unsure about is the mdadm.conf file. The many guides I have read show creating it using: mdadm --detail --scan --verbose >> /etc/mdadm.conf. When the program was installed it created its own mdadm.conf file as /etc/mdadm/mdadm.conf but all I see in it are comment lines.
A few examples I have read show creating the file in the mdadm directory but most show creating it in etc not the mdadm sub-directory. That's the history.. my questions... I assume the file is needed (even though I think the array would mount on reboot) in case it ever needs to repair. Do I create it using the "mdadm --detail --scan --verbose >> /etc/mdadm.conf" command? Does it matter if the file is in etc or the sub-directory of mdadm? Should I remove or rename the existing mdadm.conf file to prevent conflicts? Thanks for the insight.
raid mdadm mirrors
edited Dec 31 '18 at 13:48
George Udosen
20.7k94569
asked Dec 31 '18 at 13:26
D SongwriterD Songwriter
32
This may be a slight variation from the normal Linux setup on Ubuntu so I would suggest you use that subfolder. See here manpages.ubuntu.com/manpages/bionic/man5/mdadm.conf.5.html
– George Udosen
Dec 31 '18 at 13:37
add a comment |
I'm running ubuntu mate 18.04. My system is on an nvme. I had a 4TB HD with all my back ups along with my plex media. I got a second identical HD for Christmas and used it to create a raid1 array with missing (the original HD), then copied the data from orig. HD to the raid, then added the orig.HD to the raid and it is building/repairing the raid currently.
I used the DISKS GUI to mark the array for auto mount.. that created an entry if fstab. The only thing I can think of I am unsure about is the mdadm.conf file. The many guides I have read show creating it using: mdadm --detail --scan --verbose >> /etc/mdadm.conf. When the program was installed it created its own mdadm.conf file as /etc/mdadm/mdadm.conf but all I see in it are comment lines.
A few examples I have read show creating the file in the mdadm directory but most show creating it in etc not the mdadm sub-directory. That's the history.. my questions... I assume the file is needed (even though I think the array would mount on reboot) in case it ever needs to repair. Do I create it using the "mdadm --detail --scan --verbose >> /etc/mdadm.conf" command? Does it matter if the file is in etc or the sub-directory of mdadm? Should I remove or rename the existing mdadm.conf file to prevent conflicts? Thanks for the insight.
raid mdadm mirrors
edited Dec 31 '18 at 13:48
George Udosen
20.7k94569
asked Dec 31 '18 at 13:26
D SongwriterD Songwriter
32
I'm running ubuntu mate 18.04. My system is on an nvme. I had a 4TB HD with all my back ups along with my plex media. I got a second identical HD for Christmas and used it to create a raid1 array with missing (the original HD), then copied the data from orig. HD to the raid, then added the orig.HD to the raid and it is building/repairing the raid currently.
I used the DISKS GUI to mark the array for auto mount.. that created an entry if fstab. The only thing I can think of I am unsure about is the mdadm.conf file. The many guides I have read show creating it using: mdadm --detail --scan --verbose >> /etc/mdadm.conf. When the program was installed it created its own mdadm.conf file as /etc/mdadm/mdadm.conf but all I see in it are comment lines.
A few examples I have read show creating the file in the mdadm directory but most show creating it in etc not the mdadm sub-directory. That's the history.. my questions... I assume the file is needed (even though I think the array would mount on reboot) in case it ever needs to repair. Do I create it using the "mdadm --detail --scan --verbose >> /etc/mdadm.conf" command? Does it matter if the file is in etc or the sub-directory of mdadm? Should I remove or rename the existing mdadm.conf file to prevent conflicts? Thanks for the insight.
raid mdadm mirrors
raid mdadm mirrors
edited Dec 31 '18 at 13:48
George Udosen
20.7k94569
asked Dec 31 '18 at 13:26
D SongwriterD Songwriter
32
edited Dec 31 '18 at 13:48
George Udosen
20.7k94569
asked Dec 31 '18 at 13:26
D SongwriterD Songwriter
32
edited Dec 31 '18 at 13:48
George Udosen
20.7k94569
edited Dec 31 '18 at 13:48
George Udosen
20.7k94569
edited Dec 31 '18 at 13:48
George Udosen
20.7k94569
20.7k94569
asked Dec 31 '18 at 13:26
D SongwriterD Songwriter
32
asked Dec 31 '18 at 13:26
D SongwriterD Songwriter
32
asked Dec 31 '18 at 13:26
D SongwriterD Songwriter
32
32
This may be a slight variation from the normal Linux setup on Ubuntu so I would suggest you use that subfolder. See here manpages.ubuntu.com/manpages/bionic/man5/mdadm.conf.5.html
– George Udosen
Dec 31 '18 at 13:37
add a comment |
This may be a slight variation from the normal Linux setup on Ubuntu so I would suggest you use that subfolder. See here manpages.ubuntu.com/manpages/bionic/man5/mdadm.conf.5.html
– George Udosen
Dec 31 '18 at 13:37
This may be a slight variation from the normal Linux setup on Ubuntu so I would suggest you use that subfolder. See here manpages.ubuntu.com/manpages/bionic/man5/mdadm.conf.5.html
– George Udosen
Dec 31 '18 at 13:37
This may be a slight variation from the normal Linux setup on Ubuntu so I would suggest you use that subfolder. See here manpages.ubuntu.com/manpages/bionic/man5/mdadm.conf.5.html
– George Udosen
Dec 31 '18 at 13:37
add a comment |
1 Answer
1
active
oldest
votes
The little I know it appears that Ubuntu is different when it comes to where the mdadm file is placed. I have also seen the /etc/ location suggested in Linux Foundation documentations but when running on Ubuntu I discovered that it has it's own stored in the location /etc/mdadm subfolder.
So I would suggest you use that location and seen in this document, where Ubuntu location is different. The command would be
sudo mdadm --detail --scan --verbose >> /etc/mdadm/mdadm.conf
answered Dec 31 '18 at 13:46
George UdosenGeorge Udosen
20.7k94569
This was a clear answer to my question. Thank you. When I ran the command as sudo it came up with a permissions error. During my research I had watched the "031 Creating a RAID 1 array with mdadm" on youtube by Sistem Odasi which addressed this problem. I did a chmod 777 on the mdadm.conf file and afterwards this command worked.
– D Songwriter
Jan 1 at 14:17
add a comment |
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1 Answer
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1 Answer
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The little I know it appears that Ubuntu is different when it comes to where the mdadm file is placed. I have also seen the /etc/ location suggested in Linux Foundation documentations but when running on Ubuntu I discovered that it has it's own stored in the location /etc/mdadm subfolder.
So I would suggest you use that location and seen in this document, where Ubuntu location is different. The command would be
sudo mdadm --detail --scan --verbose >> /etc/mdadm/mdadm.conf
answered Dec 31 '18 at 13:46
George UdosenGeorge Udosen
20.7k94569
This was a clear answer to my question. Thank you. When I ran the command as sudo it came up with a permissions error. During my research I had watched the "031 Creating a RAID 1 array with mdadm" on youtube by Sistem Odasi which addressed this problem. I did a chmod 777 on the mdadm.conf file and afterwards this command worked.
– D Songwriter
Jan 1 at 14:17
add a comment |
The little I know it appears that Ubuntu is different when it comes to where the mdadm file is placed. I have also seen the /etc/ location suggested in Linux Foundation documentations but when running on Ubuntu I discovered that it has it's own stored in the location /etc/mdadm subfolder.
So I would suggest you use that location and seen in this document, where Ubuntu location is different. The command would be
sudo mdadm --detail --scan --verbose >> /etc/mdadm/mdadm.conf
answered Dec 31 '18 at 13:46
George UdosenGeorge Udosen
20.7k94569
This was a clear answer to my question. Thank you. When I ran the command as sudo it came up with a permissions error. During my research I had watched the "031 Creating a RAID 1 array with mdadm" on youtube by Sistem Odasi which addressed this problem. I did a chmod 777 on the mdadm.conf file and afterwards this command worked.
– D Songwriter
Jan 1 at 14:17
add a comment |
The little I know it appears that Ubuntu is different when it comes to where the mdadm file is placed. I have also seen the /etc/ location suggested in Linux Foundation documentations but when running on Ubuntu I discovered that it has it's own stored in the location /etc/mdadm subfolder.
So I would suggest you use that location and seen in this document, where Ubuntu location is different. The command would be
sudo mdadm --detail --scan --verbose >> /etc/mdadm/mdadm.conf
answered Dec 31 '18 at 13:46
George UdosenGeorge Udosen
20.7k94569
The little I know it appears that Ubuntu is different when it comes to where the mdadm file is placed. I have also seen the /etc/ location suggested in Linux Foundation documentations but when running on Ubuntu I discovered that it has it's own stored in the location /etc/mdadm subfolder.
So I would suggest you use that location and seen in this document, where Ubuntu location is different. The command would be
sudo mdadm --detail --scan --verbose >> /etc/mdadm/mdadm.conf
answered Dec 31 '18 at 13:46
George UdosenGeorge Udosen
20.7k94569
edited Dec 31 '18 at 13:53
answered Dec 31 '18 at 13:46
George UdosenGeorge Udosen
20.7k94569
answered Dec 31 '18 at 13:46
George UdosenGeorge Udosen
20.7k94569
answered Dec 31 '18 at 13:46
George UdosenGeorge Udosen
20.7k94569
20.7k94569
This was a clear answer to my question. Thank you. When I ran the command as sudo it came up with a permissions error. During my research I had watched the "031 Creating a RAID 1 array with mdadm" on youtube by Sistem Odasi which addressed this problem. I did a chmod 777 on the mdadm.conf file and afterwards this command worked.
– D Songwriter
Jan 1 at 14:17
add a comment |
This was a clear answer to my question. Thank you. When I ran the command as sudo it came up with a permissions error. During my research I had watched the "031 Creating a RAID 1 array with mdadm" on youtube by Sistem Odasi which addressed this problem. I did a chmod 777 on the mdadm.conf file and afterwards this command worked.
– D Songwriter
Jan 1 at 14:17
This was a clear answer to my question. Thank you. When I ran the command as sudo it came up with a permissions error. During my research I had watched the "031 Creating a RAID 1 array with mdadm" on youtube by Sistem Odasi which addressed this problem. I did a chmod 777 on the mdadm.conf file and afterwards this command worked.
– D Songwriter
Jan 1 at 14:17
This was a clear answer to my question. Thank you. When I ran the command as sudo it came up with a permissions error. During my research I had watched the "031 Creating a RAID 1 array with mdadm" on youtube by Sistem Odasi which addressed this problem. I did a chmod 777 on the mdadm.conf file and afterwards this command worked.
– D Songwriter
Jan 1 at 14:17
add a comment |
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This may be a slight variation from the normal Linux setup on Ubuntu so I would suggest you use that subfolder. See here manpages.ubuntu.com/manpages/bionic/man5/mdadm.conf.5.html
– George Udosen
Dec 31 '18 at 13:37