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I've got these errors, but I don't know what partition/disk corresponds to dm3 or even dm-3-8.

[22083.266714] Buffer I/O error on dev dm-3, logical block 33062912, lost sync page write [22083.266727] JBD2: Error -5 detected when updating journal superblock for dm-3-8. [22083.266729] Aborting journal on device dm-3-8. [22083.266847] Buffer I/O error on dev dm-3, logical block 33062912, lost sync page write [22083.266855] JBD2: Error -5 detected when updating journal superblock for dm-3-8. [22083.267357] Buffer I/O error on dev dm-3, logical block 0, lost sync page write [22083.267368] EXT4-fs (dm-3): I/O error while writing superblock

How I know which partition corresponds to dm-3?

Lucas Pinto
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1 Answers1

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You can use dmsetup to list dependencies of dm-3:

dmsetup deps -o devname /dev/dm-3

or, to show a list of all device mapper devices and its dependent devices:

dmsetup ls --tree -o blkdevname
Mateusz
  • 121