dm-zero device mount errors

Question

I am trying to create a dm-zero device and mount it,but getting the following errors during mount.I have been stuck here for very long. Any help will be appreciated.

Error

mount: wrong fs type, bad option, bad superblock on /dev/mapper/zero_1, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so

steps I followed are:

dmsetup create zero_1 --table '0 20000 zero'
mkfs -t ext2 /dev/mapper/zero_1
mount -t ext2 /dev/mapper/zero_1 /mnt

dmesg says:

[ 2547.110310] EXT2-fs (dm-0): error: can't find an ext2 filesystem on dev dm-0.

score 0 · Answer 1 · answered Aug 18 '14 at 12:35

0

Really? dm-zero creates device that returns only 0s. So you will never see ext2 filesystem.

answered Aug 18 '14 at 12:35

Alexander Dzyoba

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could you elobrate why I am getting this error and what needs to be done. – user3864733 Aug 18 '14 at 12:43
First, could you tell us why are you using dm-zero? What are you trying to do? – Alexander Dzyoba Aug 18 '14 at 13:02

dm-zero device mount errors

1 Answers1