Channel Detect Errors when Backing Up Linear VSAM Datasets IOS000I or IOS1000I

Products

• Disk Backup and Restore - MVS
• DISK BACKUP AND RESTORE- ADD-ON OPTIO
• DISK BACKUP AND RESTORE

Issue/Introduction

What causes Channel Detect Errors when running a BACKUP or ARCHIVE of Linear VSAM files (LDS)?
ex: IOS000I CD1C,2F,CMD,86,0E00,,5B7A0000,CMD008,@SSR7261, 221

Environment

Release: Disk™ Backup and Restore

Resolution

The message  IOS000I CD1C,2F,CMD,86,0E00  indicates:
CMD=Command reject
86=The command code of the running channel command word (CCW) when the error occurred.
0E00=The status portion of the subchannel status word (SCSW). 

X'86' is a multi-track read data issued starting at cylinder/track 5B7A/0E00 and failing on cylinder/track 5B7A/0000 for device CMD008.
Using SYSPARM USEDSSIO with or including LDS will resolve the issue.
ex. USEDSSIOLDS