I do have networker 8.2.1 nmm 8.2.1.

My exchange backups did ran 100% for months.. the hardware support people did a upgrade on the firmware on the exchnge server. When the server boot, the disk dis not present to the exchange box. after they fixed it my exchange backups failed witherror  "cannot create replica.."

I then enter the parameter NSR_CHECK_JET_ERRORS= NONE and backup run smooth again. Pease help why did this fix the problem and what does thos parameter do.