From owner-freebsd-hackers Fri Dec 1 15:43:26 1995 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.6.12/8.6.6) id PAA05062 for hackers-outgoing; Fri, 1 Dec 1995 15:43:26 -0800 Received: from seagull.rtd.com (root@seagull.rtd.com [198.102.68.2]) by freefall.freebsd.org (8.6.12/8.6.6) with ESMTP id PAA05055 for ; Fri, 1 Dec 1995 15:43:19 -0800 Received: (from dgy@localhost) by seagull.rtd.com (8.6.12/8.6.9.1) id QAA14472 for freebsd-hackers@freefall.cdrom.com; Fri, 1 Dec 1995 16:43:14 -0700 From: Don Yuniskis Message-Id: <199512012343.QAA14472@seagull.rtd.com> Subject: Re: No Thumbs??? (lack of concensus) To: freebsd-hackers@freefall.FreeBSD.org (FreeBSD hackers) Date: Fri, 1 Dec 1995 16:43:13 -0700 (MST) X-Mailer: ELM [version 2.4 PL24] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Content-Length: 1722 Sender: owner-hackers@FreeBSD.ORG Precedence: bulk It seems that Julian Elischer said: > > > > Are these things comfortable in an external enclosure (e.g., two > > > > drives in a dual drive enclosure with a single fan)? Just how "hot" > > > > is "hot"? > > > > > > Hotter than that! :-) I wouldn't recommend it. One drive in a box > > > maybe. Two, well, maybe you could put a hot plate on top and cook > > > your breakfast in the morning.. :-) > > he's not kidding.. > I have a 3GB Hitachio drive here that's cooked itself > because it was put in a normal PC cabinet.. Ah, I'm not claiming to go down *that* road! This is a single, FH 5" external enclosure (PS on the *side*) with a single fan at the rear. > when it failed, I openned the cabinet and touched the drive > to see if it was mounted solidly.. Literally I burned myself > It didn't QUITE blister, but I had a red mark on my finger for four days.. > > since then I've started looking at this, and found several instances where > the drive was too hot to touch.. > > remember it's not the wattage, it's how fst you can DISIPATE that wattage. Granted. Given that I'm "holding the enclosure and Pd constant" and only allowing the *source* of the heat to vary (i.e. tape vs. disk), this is probably the best approximation I can make without having a real drive in the enclosure! Hence the reason I'm asking these questions! :> > a soldering Iron is often only 15 Watts, but it gets to, what, 300+ degrees F? Actually, more like 700F. > > Yikes! It seems that the drives tend to run 10 to 15W (typical). My > > tape drive is in the same case (single full height 5") and it doesn't > > seem to complain or get too hot -- in fact, the case barely gets warm! > > Am I missing something here??