I posted the wrong part numbers...
hicksd8, sorry if I have wasted your time.....
The sun drive I remove (failed drive) part number is
SUN: ST314655SSUN146G
Seagate: ST3146855SS
And i'm replacing it with a drive with just seagate ST3146855SS without
the additional Sun part model number on it.
The drive is part of a ZFS pool... and it's a spare drive too.