Hello Markus,
this could be a possible typo as the X488A-R5 drive translates into the Hitachi HUC109090CSS600 drive.
The drive itself has an interface of 6GB/s. Though, an official statement would be nice. 😉
I'm quite sure that the connection to an IOM6 won't be throttled, but I would not recommend mixing 3GB/s and 6GB/s disks in the same aggregate. (but maybe it's only a typo)
![drive.JPG drive.JPG](https://community.netapp.com/t5/image/serverpage/image-id/1657i5957E7ED46F26AB5/image-size/original?v=mpbl-1&px=-1)
![SAS_Disk.JPG SAS_Disk.JPG](https://community.netapp.com/t5/image/serverpage/image-id/1658i7896CDC23A0590E4/image-size/original?v=mpbl-1&px=-1)
Regards
Michael