Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site watdcsu.UUCP Path: utzoo!watmath!watdcsu!rsellens From: rsellens@watdcsu.UUCP (Rick Sellens - Mech. Eng.) Newsgroups: net.micro.pc Subject: Re: Adding a hard disk to your IBM PC Message-ID: <926@watdcsu.UUCP> Date: Fri, 8-Feb-85 14:58:54 EST Article-I.D.: watdcsu.926 Posted: Fri Feb 8 14:58:54 1985 Date-Received: Sat, 9-Feb-85 05:46:31 EST References: <420@rlgvax.UUCP> Reply-To: rsellens@watdcsu.UUCP (Rick Sellens - Mech. Eng.) Distribution: net Organization: U of Waterloo, Ontario Lines: 27 Summary: Re: running a hard disk with the 65 watt power supply I added a 10 meg half height drive to my fully loaded, 64K mother board PC last June. I had no problem until I had had the machine on for about 3 hours when the system just crapped out. After a fair bit of messing around I found the following was the problem - When chips are hot they draw more current. - When the floppy drive starts up there is an initial high current transient. - If that transient goes over the power supply limits the supply will shut down. The result is semi repeatable crashes when the machine is hot and the floppy drive is accessed. The simple solution is more power. It can be either a replacement XT type power supply (big $), a "clip on" sold for just this purpose (smaller $), or even the power supply from an external floppy drive. I took the last course because a friend had an unused floppy enclosure that he let me have for next to nothing. I've been running this way for about eight months with no problems. Rick Sellens UUCP: watmath!watdcsu!rsellens CSNET: rsellens%watdcsu@waterloo.csnet ARPA: rsellens%watdcsu%waterloo.csnet@csnet-relay.arpa