Backup jobs failed

Tell us more about the PureDisk server as it seems to be where the problem is:

4/10/2015 7:46:24 AM - Critical bpdm(pid=15280) Storage Server Error: (Storage server: PureDisk:backup-m01.com) PdvfsRead: Failed to read from spoold (Input/output error). Ensure storage server services are running and operational. V-454-19
4/10/2015 7:46:24 AM - Critical bpdm(pid=15280) sts_read_image failed: error 2060017 system call failed     
4/10/2015 7:46:24 AM - Critical bpdm(pid=15280) image read failed: error 2060017: system call failed    
4/10/2015 7:46:24 AM - Error bpdm(pid=15280) cannot read image from disk, Invalid argument     
4/10/2015 7:46:25 AM - Info backup.com(pid=15280) StorageServer=PureDisk:backup-m01.com; Report=PDDO 

Similar error in this forum post:

https://vox.veritas.com/t5/NetBackup-Appliance/Netbackup-5200-Duplication-Jobs-Fail-with-Error-191-then-keep-re/m-p/526411

 Try to verify image EDCPFILE_1428131051 (and others failing to duplicate) and see what the result is.