Introduction

The following material is intended to serve as an example and a reference guide to help spot when disk input/output errors coming from the hardware are creating problems for the backup agent, with somewhat varying error messages shown in the backup console and in PCS logs. The existence of hardware disk errors is not only a problem for the creation of backups - it can pose a hidden yet significant danger to the stability and operability of the customer's machine, and can easily lead to data loss - so spotting those on time can be crucial.