Date: Tue, 20 Jun 1995 00:10:12 -0700 (PDT) From: "Rodney W. Grimes" <rgrimes@gndrsh.aac.dev.com> To: rcarter@geli.com (Russell L. Carter) Cc: freebsd-bugs@freebsd.org, rcarter@geli.com Subject: Re: SOLVED: Re: more on st cataclysmic error 8-) Message-ID: <199506200710.AAA02600@gndrsh.aac.dev.com> In-Reply-To: <199506200605.XAA00362@geli.clusternet> from "Russell L. Carter" at Jun 19, 95 11:05:53 pm
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> > > is the middle of June, temperatures have climbed into the middle > 70Fs here, and damn, but the tape drive is overheating! I pulled > it out of the case and have now just successfully backed up 1G+ > twice in a row, so improved cooling might be the solution. (I installed > this thing in Jan, and we've had a regular winter extending to > middle June, very odd.) Ahh.. didn't even think about that, but yes, DAT drives are hot running. I always place them in the the case such that there is dead air under them and preferable right in line with the power supply air inlets so that you get good air flow to the tape drive. I never place another device immediatly below or above a DAT drive unless I absolutely must. The down side of this placement is that it likes to suck all the room dust through your dust sensitive tape drive :-(. Also note that dual fan cases with one fan in front pushing air and one fan in the power supply pulling air actually cause very poor air flow to occur accross the drive bays. I usually reverse the front fan and have it blow as well thus reducing the problem of direct air flow from the inlet fan to the outlet fan with little else getting cooled. [I actually just prefer single fan cases with a decent fan in the power supply since it eliminates the bad air flow I have seen in so many cases that use a push/pull fan combo.] Or if it is to be multiple fans they should all be mounted in the rear of the case blowing outward, I like negative pressure dust sucking monsters, so much infact the MSE/800 I worked on for Rolm Milspec had 8 EGG variable speed fans in it that could push 2000CFM combined and vacumn a 6 square foot area infront of the machine for you :-) If you wanted to post a note about machine status you just wrote it on a 8.5" x 11" sheet and hurled in front of the machine, it would get sucked onto the front and stay... :-) -- Rod Grimes rgrimes@gndrsh.aac.dev.com Accurate Automation Company Custom computers for FreeBSD
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