Summary: Best drives I could get for my ReadyNAS Duo v1. The speed upgrade from the factory drives is night and day. I can now watch and transfer videos/files simultaneously without lag or video stutter. Well worth it. Follow instructions and ensure backups have been performed prior to any drive upgrade/replacement. Enjoy!
Summary: First, a disclaimer; if you purchase this item and you want the P/N 0F12115, make sure you ASK for that specific P/N. They are often sold in a bulk lot with the 32 Mb cache, 3 Gb/s drives. While the performance difference is arguably marginal, the performance tests I read were for a very specific model and I wanted to make sure I got the exact one, which I did not get initially from two different sellers. You may or may not care, but just be advised.
Summary: Bought 6 for a RAID storage server. RAID wouldn't initialize due to drive errors, so my IT department ran a suite of diagnostic tests on them. 3 came back as dead on arrival - right out of the box in sealed packaging. I'll update rating if RMA process works.