RAIDs disappearing on reboot (Centos 7.5)

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I'm trying to create 4 RAID 0 disk arrays on my system running Centos 7.5 and have the RAIDs automount after a reboot. For some reason, only one of the RAIDs /dev/md0 is persistent between boots. The remaining three RAIDs (md1,md2,md3) all disappear after a reboot.



I build the RAIDs using:



$ sudo mdadm --create --chunk 4096 --verbose /dev/md0 --level=stripe 
 --raid-devices=2 /dev/nvme0n1 /dev/nvme1n1

$ sudo mdadm --create --chunk 4096 --verbose /dev/md1 --level=stripe 
 --raid-devices=2 /dev/nvme2n1 /dev/nvme3n1

$ sudo mdadm --create --chunk 4096 --verbose /dev/md2 --level=stripe 
 --raid-devices=2 /dev/nvme4n1 /dev/nvme5n1

$ sudo mdadm --create --chunk 4096 --verbose /dev/md3 --level=stripe 
 --raid-devices=2 /dev/nvme6n1 /dev/nvme7n1


Then I update the /etc/mdadm.conf file using:



$ mdadm --detail --scan >> /etc/mdadm.conf


Finally after mounting the drives to their appropriate directory and adding them to /etc/fstab I rebuilt the initramfs image using dracut:



$ sudo dracut --force --mdadmconf


After running dracut, I reboot the system and /dev/md0 is there but the other RAIDs are not, so I did some investigating and it seems like /etc/mdadm.conf is not being included in the initramfs, so I repeated all of the previous steps, except for the dracut command I manually added what seemed to be missing using:



$ sudo dracut --force --include /etc/mdadm.conf /etc/mdadm.conf 
 --add="mdraid" --mdadmconf`


After running the command, I see that /etc/mdadm.conf and /usr/sbin/mdadm are included in the initramfs using:



$ sudo lsinitrd /boot/initramfs-$(uname -r).img


What am I missing?



Edit 1
I've added mdadm --assemble --scan to /etc/rc.local and tried running it from the command line once the system has booted, but md1, md2, and md3 still are not found. As before, md0 is found at boot.



I have a separate OS disk, so I am not booting from md0






centos raid mdadm software-raid dracut







share|improve this question























  • Are the partitions marked linux raid? (type fd)
    – wurtel
    Aug 8 at 9:39










  • Looking at this it would seem to be the case that you're suppose to bring up the rest yourself - superuser.com/questions/801826/…. The A'er you received is basically telling you this, but not telling you how. You could put mdadm --assemble --scan in rc.local to see if it forces them to come up. I'd suspect you could put this into systemd as well.
    – slm♦
    Aug 8 at 11:04











  • See this thread - centos.org/forums/viewtopic.php?t=54901.
    – slm♦
    Aug 8 at 11:21














up vote
4
down vote

favorite












I'm trying to create 4 RAID 0 disk arrays on my system running Centos 7.5 and have the RAIDs automount after a reboot. For some reason, only one of the RAIDs /dev/md0 is persistent between boots. The remaining three RAIDs (md1,md2,md3) all disappear after a reboot.



I build the RAIDs using:



$ sudo mdadm --create --chunk 4096 --verbose /dev/md0 --level=stripe 
 --raid-devices=2 /dev/nvme0n1 /dev/nvme1n1

$ sudo mdadm --create --chunk 4096 --verbose /dev/md1 --level=stripe 
 --raid-devices=2 /dev/nvme2n1 /dev/nvme3n1

$ sudo mdadm --create --chunk 4096 --verbose /dev/md2 --level=stripe 
 --raid-devices=2 /dev/nvme4n1 /dev/nvme5n1

$ sudo mdadm --create --chunk 4096 --verbose /dev/md3 --level=stripe 
 --raid-devices=2 /dev/nvme6n1 /dev/nvme7n1


Then I update the /etc/mdadm.conf file using:



$ mdadm --detail --scan >> /etc/mdadm.conf


Finally after mounting the drives to their appropriate directory and adding them to /etc/fstab I rebuilt the initramfs image using dracut:



$ sudo dracut --force --mdadmconf


After running dracut, I reboot the system and /dev/md0 is there but the other RAIDs are not, so I did some investigating and it seems like /etc/mdadm.conf is not being included in the initramfs, so I repeated all of the previous steps, except for the dracut command I manually added what seemed to be missing using:



$ sudo dracut --force --include /etc/mdadm.conf /etc/mdadm.conf 
 --add="mdraid" --mdadmconf`


After running the command, I see that /etc/mdadm.conf and /usr/sbin/mdadm are included in the initramfs using:



$ sudo lsinitrd /boot/initramfs-$(uname -r).img


What am I missing?



Edit 1
I've added mdadm --assemble --scan to /etc/rc.local and tried running it from the command line once the system has booted, but md1, md2, and md3 still are not found. As before, md0 is found at boot.



I have a separate OS disk, so I am not booting from md0






centos raid mdadm software-raid dracut







share|improve this question























  • Are the partitions marked linux raid? (type fd)
    – wurtel
    Aug 8 at 9:39










  • Looking at this it would seem to be the case that you're suppose to bring up the rest yourself - superuser.com/questions/801826/…. The A'er you received is basically telling you this, but not telling you how. You could put mdadm --assemble --scan in rc.local to see if it forces them to come up. I'd suspect you could put this into systemd as well.
    – slm♦
    Aug 8 at 11:04











  • See this thread - centos.org/forums/viewtopic.php?t=54901.
    – slm♦
    Aug 8 at 11:21












up vote
4
down vote

favorite









up vote
4
down vote

favorite











I'm trying to create 4 RAID 0 disk arrays on my system running Centos 7.5 and have the RAIDs automount after a reboot. For some reason, only one of the RAIDs /dev/md0 is persistent between boots. The remaining three RAIDs (md1,md2,md3) all disappear after a reboot.



I build the RAIDs using:



$ sudo mdadm --create --chunk 4096 --verbose /dev/md0 --level=stripe 
 --raid-devices=2 /dev/nvme0n1 /dev/nvme1n1

$ sudo mdadm --create --chunk 4096 --verbose /dev/md1 --level=stripe 
 --raid-devices=2 /dev/nvme2n1 /dev/nvme3n1

$ sudo mdadm --create --chunk 4096 --verbose /dev/md2 --level=stripe 
 --raid-devices=2 /dev/nvme4n1 /dev/nvme5n1

$ sudo mdadm --create --chunk 4096 --verbose /dev/md3 --level=stripe 
 --raid-devices=2 /dev/nvme6n1 /dev/nvme7n1


Then I update the /etc/mdadm.conf file using:



$ mdadm --detail --scan >> /etc/mdadm.conf


Finally after mounting the drives to their appropriate directory and adding them to /etc/fstab I rebuilt the initramfs image using dracut:



$ sudo dracut --force --mdadmconf


After running dracut, I reboot the system and /dev/md0 is there but the other RAIDs are not, so I did some investigating and it seems like /etc/mdadm.conf is not being included in the initramfs, so I repeated all of the previous steps, except for the dracut command I manually added what seemed to be missing using:



$ sudo dracut --force --include /etc/mdadm.conf /etc/mdadm.conf 
 --add="mdraid" --mdadmconf`


After running the command, I see that /etc/mdadm.conf and /usr/sbin/mdadm are included in the initramfs using:



$ sudo lsinitrd /boot/initramfs-$(uname -r).img


What am I missing?



Edit 1
I've added mdadm --assemble --scan to /etc/rc.local and tried running it from the command line once the system has booted, but md1, md2, and md3 still are not found. As before, md0 is found at boot.



I have a separate OS disk, so I am not booting from md0






centos raid mdadm software-raid dracut







share|improve this question















I'm trying to create 4 RAID 0 disk arrays on my system running Centos 7.5 and have the RAIDs automount after a reboot. For some reason, only one of the RAIDs /dev/md0 is persistent between boots. The remaining three RAIDs (md1,md2,md3) all disappear after a reboot.



I build the RAIDs using:



$ sudo mdadm --create --chunk 4096 --verbose /dev/md0 --level=stripe 
 --raid-devices=2 /dev/nvme0n1 /dev/nvme1n1

$ sudo mdadm --create --chunk 4096 --verbose /dev/md1 --level=stripe 
 --raid-devices=2 /dev/nvme2n1 /dev/nvme3n1

$ sudo mdadm --create --chunk 4096 --verbose /dev/md2 --level=stripe 
 --raid-devices=2 /dev/nvme4n1 /dev/nvme5n1

$ sudo mdadm --create --chunk 4096 --verbose /dev/md3 --level=stripe 
 --raid-devices=2 /dev/nvme6n1 /dev/nvme7n1


Then I update the /etc/mdadm.conf file using:



$ mdadm --detail --scan >> /etc/mdadm.conf


Finally after mounting the drives to their appropriate directory and adding them to /etc/fstab I rebuilt the initramfs image using dracut:



$ sudo dracut --force --mdadmconf


After running dracut, I reboot the system and /dev/md0 is there but the other RAIDs are not, so I did some investigating and it seems like /etc/mdadm.conf is not being included in the initramfs, so I repeated all of the previous steps, except for the dracut command I manually added what seemed to be missing using:



$ sudo dracut --force --include /etc/mdadm.conf /etc/mdadm.conf 
 --add="mdraid" --mdadmconf`


After running the command, I see that /etc/mdadm.conf and /usr/sbin/mdadm are included in the initramfs using:



$ sudo lsinitrd /boot/initramfs-$(uname -r).img


What am I missing?



Edit 1
I've added mdadm --assemble --scan to /etc/rc.local and tried running it from the command line once the system has booted, but md1, md2, and md3 still are not found. As before, md0 is found at boot.



I have a separate OS disk, so I am not booting from md0






centos raid mdadm software-raid dracut




centos raid mdadm software-raid dracut






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Aug 8 at 13:59

























asked Aug 7 at 18:44









ks0ze

1212




1212











  • Are the partitions marked linux raid? (type fd)
    – wurtel
    Aug 8 at 9:39










  • Looking at this it would seem to be the case that you're suppose to bring up the rest yourself - superuser.com/questions/801826/…. The A'er you received is basically telling you this, but not telling you how. You could put mdadm --assemble --scan in rc.local to see if it forces them to come up. I'd suspect you could put this into systemd as well.
    – slm♦
    Aug 8 at 11:04











  • See this thread - centos.org/forums/viewtopic.php?t=54901.
    – slm♦
    Aug 8 at 11:21
















  • Are the partitions marked linux raid? (type fd)
    – wurtel
    Aug 8 at 9:39










  • Looking at this it would seem to be the case that you're suppose to bring up the rest yourself - superuser.com/questions/801826/…. The A'er you received is basically telling you this, but not telling you how. You could put mdadm --assemble --scan in rc.local to see if it forces them to come up. I'd suspect you could put this into systemd as well.
    – slm♦
    Aug 8 at 11:04











  • See this thread - centos.org/forums/viewtopic.php?t=54901.
    – slm♦
    Aug 8 at 11:21















Are the partitions marked linux raid? (type fd)
– wurtel
Aug 8 at 9:39




Are the partitions marked linux raid? (type fd)
– wurtel
Aug 8 at 9:39












Looking at this it would seem to be the case that you're suppose to bring up the rest yourself - superuser.com/questions/801826/…. The A'er you received is basically telling you this, but not telling you how. You could put mdadm --assemble --scan in rc.local to see if it forces them to come up. I'd suspect you could put this into systemd as well.
– slm♦
Aug 8 at 11:04





Looking at this it would seem to be the case that you're suppose to bring up the rest yourself - superuser.com/questions/801826/…. The A'er you received is basically telling you this, but not telling you how. You could put mdadm --assemble --scan in rc.local to see if it forces them to come up. I'd suspect you could put this into systemd as well.
– slm♦
Aug 8 at 11:04













See this thread - centos.org/forums/viewtopic.php?t=54901.
– slm♦
Aug 8 at 11:21




See this thread - centos.org/forums/viewtopic.php?t=54901.
– slm♦
Aug 8 at 11:21










1 Answer
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The initrd only creates the RAID array needed for root and swap. Run this from the main system (after initrd changes to the real root)



$ sudo mdadm --assemble --scan





share|improve this answer






















  • Whoever downvoted, please give at least a reason. Regarding sudo, I didn't mean to run it from the command line as an unprivileged user, but from a script that runs as root.
    – RalfFriedl
    Aug 8 at 6:14










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1 Answer
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active

oldest

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active

oldest

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active

oldest

votes








up vote
0
down vote













The initrd only creates the RAID array needed for root and swap. Run this from the main system (after initrd changes to the real root)



$ sudo mdadm --assemble --scan





share|improve this answer






















  • Whoever downvoted, please give at least a reason. Regarding sudo, I didn't mean to run it from the command line as an unprivileged user, but from a script that runs as root.
    – RalfFriedl
    Aug 8 at 6:14














up vote
0
down vote













The initrd only creates the RAID array needed for root and swap. Run this from the main system (after initrd changes to the real root)



$ sudo mdadm --assemble --scan





share|improve this answer






















  • Whoever downvoted, please give at least a reason. Regarding sudo, I didn't mean to run it from the command line as an unprivileged user, but from a script that runs as root.
    – RalfFriedl
    Aug 8 at 6:14












up vote
0
down vote










up vote
0
down vote









The initrd only creates the RAID array needed for root and swap. Run this from the main system (after initrd changes to the real root)



$ sudo mdadm --assemble --scan





share|improve this answer














The initrd only creates the RAID array needed for root and swap. Run this from the main system (after initrd changes to the real root)



$ sudo mdadm --assemble --scan






share|improve this answer














share|improve this answer



share|improve this answer








edited Aug 8 at 4:50









slm♦

238k65491662




238k65491662










answered Aug 7 at 20:03









RalfFriedl

3,5601522




3,5601522











  • Whoever downvoted, please give at least a reason. Regarding sudo, I didn't mean to run it from the command line as an unprivileged user, but from a script that runs as root.
    – RalfFriedl
    Aug 8 at 6:14
















  • Whoever downvoted, please give at least a reason. Regarding sudo, I didn't mean to run it from the command line as an unprivileged user, but from a script that runs as root.
    – RalfFriedl
    Aug 8 at 6:14















Whoever downvoted, please give at least a reason. Regarding sudo, I didn't mean to run it from the command line as an unprivileged user, but from a script that runs as root.
– RalfFriedl
Aug 8 at 6:14




Whoever downvoted, please give at least a reason. Regarding sudo, I didn't mean to run it from the command line as an unprivileged user, but from a script that runs as root.
– RalfFriedl
Aug 8 at 6:14

















 

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