~24 years ago I had 2x 15k SCSI drives that were 3.5” wide but the full height of a 5.25” drive. For the time the things were fast as hell… they were also, however, hot as hell. So I got some large aluminum heat sinks and attached them to each side and made a 5.25” drive adapter out of aluminum. Since it was open to the front my case exhaust fans cooled the drives as it was the main intake for the case and it worked pretty darn well until I upgraded.
~24 years ago I had 2x 15k SCSI drives that were 3.5” wide but the full height of a 5.25” drive. For the time the things were fast as hell… they were also, however, hot as hell. So I got some large aluminum heat sinks and attached them to each side and made a 5.25” drive adapter out of aluminum. Since it was open to the front my case exhaust fans cooled the drives as it was the main intake for the case and it worked pretty darn well until I upgraded.