How to get more information about "bad blocks" using mdadm

Solution Verified - Updated -

Issue

  • mdadm maintains a BBL (Bad Block List) for a disk used in raid mode

  • presence of bad blocks in BBL is notices when examining raid devices with mdadm -E /dev/<disk><partition_numer>

    $ mdadm -E /dev/<disk><partition_number>
...
Bad Block Log : 512 entries available at offset 32 sectors - bad blocks present.
...

  • how to list "bad blocks" for this particular device and get more information from the BBL (Bad Block List)?

Environment

  • Red Hat Enterprise Linux (RHEL)
  • mdadm

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more.

Current Customers and Partners

Log in for full access

Log In

New to Red Hat?

Learn more about Red Hat subscriptions

Using a Red Hat product through a public cloud?

How to access this content