[83100.022162] EXT4-fs error (device sda2): ext4_ext_search_left:1222: inode #525537: comm flush-8:0: ix (14698) != EXT_FIRST_INDEX (0) (depth 1)!
[83100.022169] Aborting journal on device sda2-8.
[83100.023069] EXT4-fs (sda2): Remounting filesystem read-only
[83100.023077] EXT4-fs error (device sda2) in ext4_da_writepages:2298: IO failure
[83100.023221] EXT4-fs (sda2): ext4_da_writepages: jbd2_start: 216 pages, ino 525537; err -30