blk_update_request I/O error, dev sde, sector 0

kernel: blk_update_request: I/O error, dev sde, sector 0
kernel: blk_update_request: I/O error, dev sdf, sector 0
kernel: blk_update_request: I/O error, dev sdd, sector 0
kernel: blk_update_request: I/O error, dev sdc, sector 0

Why this error occurred? Can we ignore this alert?

How can we resolve this?