Hi all, Frist of all, thank you for Ext4's developer. I have encounterd a crash problem of ext4 file system on Kernel 3.18.20 with mounting rw,seclabel,nosuid,nodev,relatime,discard,noauto_da_alloc,data=ordered 0 0. [ 22.361511] EXT4-fs error (device sda8): ext4_mb_generate_buddy:757: group 0, block bitmap and bg descriptor inconsistent: 21208 vs 21219 free clusters I think, the reason is that recovered transactions has not recovered over 39809 during booting. Booting N-2 [ 16.416979] (jbd2_journal_recover, 279): JBD2: recovery, exit status 0, recovered transactions 39665 to 39728 Last commit_sequence=39796 Booting N-1 [ 16.626582] (jbd2_journal_recover, 279): JBD2: recovery, exit status 0, recovered transactions 39730 to 39797 Last commit_sequence=39866 Booting N [ 14.118542] (jbd2_journal_recover, 279): JBD2: recovery, exit status 0, recovered transactions 39799 to 39809 The root casue will be explained the more detail in the follwing. Jounral Blocks ... <Descriptor block #39808> <Data blocks> <Commit block #39808> <All zero block> <Descriptor block #39809> <Data blocks> <Commit block #39809> ... I'm wondering that journal has all zero data, only 1 block. How it can be possible? Any tips or help would be appreciated. Regards, Abraham Choi -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html