Different disk models to extend an aggregate

Hi All,

Our ageing FAS2220 is on its last legs (EOL end of November), were hoping to get a shiny C190 soon but in the meantime have to keep our old friend running and its running low on space.

We have managed to source a few disks (cheap refurbs) to extend the aggregate as an interim measure but they are slightly different models to the existing ones in the aggregate.

All are 450GB 10k SAS however the existing are X421_FAL12 where the new ones are X421_HCOBD. Are the two compatible and is it safe just to add them to the aggregate?

Thanks in advance for any replies!