dmesg | grep sde1 
[    6.052365]  sde: sde1 sde2
[   24.311524] EXT4-fs (sde1): mounted filesystem with ordered data mode
[68135.597687] EXT4-fs error (device sde1): ext4_mb_generate_buddy: EXT4-fs: group 5: 25765 blocks in bitmap, 25798 in gd
[68135.598650] Aborting journal on device sde1-8.
[68135.757257] EXT4-fs (sde1): Remounting filesystem read-only
[68135.927158] EXT4-fs (sde1): delayed block allocation failed for inode 29 at logical offset 0 with max blocks 1600 with error -30
[68135.929875] EXT4-fs (sde1): ext4_da_writepages: jbd2_start: 1600 pages, ino 29; err -30