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I have a server with a LSI raid controller. The server shows two devices sda and sdb. sdb is not partitioned but has a xfs fs formatted directly (i don't know why) into it. We decide to reboot it after 100+ days of working flawlessly to test a new startup script. When coming back online it drops into an emergency boot complaining that superblock not found. I did xfs_repair -n and it could not find a secondary superblock. What is really strange is that if I mount it read-only in the console it mounts ok.

panitaxx
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  • You should add more information like relevant line of */etc/fstab*, the exact commands and output you did with `xfs_repair` and also the relevant part of `dmesg` after running `xfs_repair`. – Thomas Jul 21 '18 at 05:20

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After reading Thomas comment I an found error. I checked fstab and verify mounted fs. Both types were different. fstab had type xfs but the filesystem was really ext4. so the error was in the fstab.

panitaxx
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