Disk failure on PX6-300D

[killianno]

Hi all,

One of my PX6 disks is out.(RAID5)
Disks in this NAS are ST3000DM001-1CH166 (CC27).
I receive a ST3000DM001-1ER166 instead of ST3000DM001-1CH166.
Do you think that I can replace the 1CH166 by a 1ER166?

Thanks a lot for you answers.

Pat.