1*6a54128fSAndroid Build Coastguard Worker*** e2fsck 2*6a54128fSAndroid Build Coastguard Workerext2fs_open2: Bad magic number in super-block 3*6a54128fSAndroid Build Coastguard Worker../e2fsck/e2fsck: Superblock invalid, trying backup blocks... 4*6a54128fSAndroid Build Coastguard Worker../e2fsck/e2fsck: Bad magic number in super-block while trying to open test.img 5*6a54128fSAndroid Build Coastguard Worker 6*6a54128fSAndroid Build Coastguard WorkerThe superblock could not be read or does not describe a valid ext2/ext3/ext4 7*6a54128fSAndroid Build Coastguard Workerfilesystem. If the device is valid and it really contains an ext2/ext3/ext4 8*6a54128fSAndroid Build Coastguard Workerfilesystem (and not swap or ufs or something else), then the superblock 9*6a54128fSAndroid Build Coastguard Workeris corrupt, and you might try running e2fsck with an alternate superblock: 10*6a54128fSAndroid Build Coastguard Worker e2fsck -b 8193 <device> 11*6a54128fSAndroid Build Coastguard Worker or 12*6a54128fSAndroid Build Coastguard Worker e2fsck -b 32768 <device> 13*6a54128fSAndroid Build Coastguard Worker 14*6a54128fSAndroid Build Coastguard Workertest.img contains a xfs file system labelled 'test_filsys' 15*6a54128fSAndroid Build Coastguard Worker*** debugfs 16*6a54128fSAndroid Build Coastguard Workerdebugfs: Bad magic number in super-block while trying to open test.img 17*6a54128fSAndroid Build Coastguard Workertest.img contains a xfs file system labelled 'test_filsys' 18*6a54128fSAndroid Build Coastguard Worker*** tune2fs 19*6a54128fSAndroid Build Coastguard Worker../misc/tune2fs: Bad magic number in super-block while trying to open test.img 20*6a54128fSAndroid Build Coastguard Workertest.img contains a xfs file system labelled 'test_filsys' 21*6a54128fSAndroid Build Coastguard Worker*** mke2fs 22*6a54128fSAndroid Build Coastguard WorkerCreating filesystem with 16384 1k blocks and 4096 inodes 23*6a54128fSAndroid Build Coastguard WorkerSuperblock backups stored on blocks: 24*6a54128fSAndroid Build Coastguard Worker 8193 25*6a54128fSAndroid Build Coastguard Worker 26