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I have 4 working RAID5 installed on Ubuntu 16 and cannot find out HOW to option them to mount on boot. They are both DOS and GPT and work fine when mounted manually.

helen
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  • Have you entered them into the /etc/fstab file? – Gordster Jun 28 '19 at 17:03
  • Can I use format directly from blkid ? /dev/md0p1: LABEL="DOC" UUID="92f91148-a6dd-4d06-9276-83ba2e39ec07" TYPE="ext4" PARTUUID="6a551d9f-01" /dev/md0p2: LABEL="DEV_ORIGINAL" UUID="506d7ca6-b09c-415b-a681-f7f71ec62513" TYPE="ext4" PARTUUID="6a551d9f-02" /dev/md0p3: LABEL="MISC" UUID="922f42e6-6ab1-4cd0-bc82-2aee9868187f" TYPE="ext4" PARTUUID="6a551d9f-03" /dev/md0p4: LABEL="BACK" UUID="d2af4a0a-ecaa-48bc-a80c-5dae8b20e5af" TYPE="ext4" PARTUUID="6a551d9f-04" –  Jun 29 '19 at 18:43
  • Do I have to add each /dev/sdx ? Or can I just add /dev/md0 ? –  Jun 29 '19 at 18:46
  • @JanHus you only add the md0 device. Did you get it to work? – Gordster Jul 01 '19 at 20:47
  • Yes, but only when I use LABEL (only) instead of UUID or /dev –  Jul 03 '19 at 01:40
  • @JanHus I am glad you were able to get it to work. Would you say this question has been "answered"? – Gordster Jul 05 '19 at 22:21
  • Yes and no. It seems that "LABEL" has replaced UUID , however fstab does nor seems to work using other symbols like "TYPE". fstab needs better documentation. Cannot honestly say my original question has been clearly answered. –  Jul 06 '19 at 23:13

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You have to edit the file /etc/fstab in order to have them mounted at boot

first do ls -l /dev/disk/by-uuid/ in order to get the uuid associated with the various raid devices. You can also use the command blkid to accomplish the same goal.

add the entries into /etc/fstab using whichever text editor you'd like. The format is

<file system> <mount point> <type> <options> <dump> <pass>

so it will look like

UUID=(Put uuid here) /target-directory filesystem defaults 0 0

I have a raid 5 device mounted to a directory at /mnt/raid5 with an xfs filesystem so my /etc/fstab file has this entry

UUID=d1bcc3e6-a211-409c-b6b7-e86652c5fb54 /mnt/raid5 xfs defaults 0 0

replace "target-directory" with the actual directory you are targeting and the filesystem with whatever kind of filesystem you have on those raid devices (ext4, xfs, etc....).

Gordster
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