Hard Drive Boundary

Is there an upper limit that Solaris 5 will see on a hard drive? My question comes from the fact that I installed a new unformatted 20gb seagate drive in an ultra 5 running solaris 5. When I enter format, the output shows only 8gb (7.7 something minus the buffer). Is there a patch I can install or anything I can do to enable the workstation to see the entire 20gb disk? I have some similar ultra-5's that are running 2.7 that dont have this issue.

Thanks

Mike

[481 byte] By [mikep_vt90] at [2007-11-26 8:30:18]