Bad 2500A?

All meida written with 4x and the original firmware. Four out of twelve Verbatim DVD-R 4x show bad sectors. A Verbatim +RW 4x works perfect. :frowning: I am really confused. Should I rma this drive?

What IDE drivers are you using?

Onboard Controller (KT133A)
Primary Master Samsung SP1614N 160GB UDMA5
Secondary Master NEC 2500A UDMA2
Promise Controller
Primary Master AOpen 1648/AAP
Secondary Master IBM DJNA 351520 15GB
Secondary Slave Maxtor 4R080J0 80GB