ext4 loopback device, Buffer I/O Error on reboot

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Posted by cvb on Server Fault See other posts from Server Fault or by cvb
Published on 2012-06-11T21:43:50Z Indexed on 2012/06/11 22:41 UTC
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I am trying to mount a loopback device on my ext4 formatted ssd drive. I get these errors when I reboot on Linux kernel 2.6.38.8

Buffer I/O error on device loop1, logical block 0

Here is what I do:

dd if=/dev/zero of=/mnt/s/lodev bs=4096 count=250000

mkfs.ext4 /mnt/s/lodev

mount -n -o loop,rw /mnt/s/lodev /mnt/test

The loopback mount is successful, but on reboot I get errors as mentioned above. Even mouting with 'sync','data=writeback' does not help.

I tried to losetup a device, but see the same behavior. I also reformatted the base device and created the loopback device and mounted as above, I still see these errors. I do not see them when I format them as vfat.

Appreciate any suggestions on this problem.

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