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Groups > comp.sys.raspberry-pi > #25376
| From | Martin Gregorie <martin@mydomain.invalid> |
|---|---|
| Newsgroups | comp.sys.raspberry-pi |
| Subject | Re: USB card adapters crash Pi4 |
| Date | 2021-01-02 00:52 +0000 |
| Organization | A noiseless patient Spider |
| Message-ID | <rsog5b$cbb$1@dont-email.me> (permalink) |
| References | <rso244$fck$1@dont-email.me> <slrnruvc8r.jhh.nlazicBEZ_OVOGA@mudrac.ffzg.hr> |
On Fri, 01 Jan 2021 23:32:43 +0000, Nikolaj Lazic wrote: > Dana Fri, 1 Jan 2021 20:53:25 -0000 (UTC), bob prohaska > <bp@www.zefox.net> napis'o: >> Just tried using a couple of USB card adapters with my 8GB Pi4. >> Both cause immediate loss of USB hard disk access. Unplugging the >> offending adapter does not restore normal operation. Power cycling puts >> matters right without apparent ill effect. > > Not enough power? From your description it sounds as if you're booting with the adapters disconnected and the hangup occurs when one or both are connected to the Pi. Is that what happened? Do they work correctly when used together on another computer? Have you got a multimeter, osscilloscope or any other way to check the Pi's supply voltage? ------- I tend to keep a Pi power cable modified so I can measure the voltage across it. I run the cable through a small plastic box with terminals on the lid, the terminals are type used on oscilloscopes or multimeters for connecting test probes. These are worth using because they're difficult to short accidentally. The terminals on the box are connected to the red and black wires in the power cable. So that putting a multimeter or 'scope across them lets you monitor the supply voltage going into the Pi. I sometimes put two terminals in series on the red cable with an on/off switch on the bit of wire between the 'red' terminals: this makes current measurement easy: turn the switch off and connect a meter on the two 'red terminals to measure current. Don't wanna measure current? disconnect meter from red terminals and turn the switch on. You mightn't use this gadget very often, but boy is it useful to have one when you suddenly need to check voltage or current in a USB terminated cable. Farnell, Conrad and similar outfits sell suitable boxes and terminals as well as soldering irons and multimeters -- -- Martin | martin at Gregorie | gregorie dot org
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USB card adapters crash Pi4 bob prohaska <bp@www.zefox.net> - 2021-01-01 20:53 +0000
Re: USB card adapters crash Pi4 Nikolaj Lazic <nlazicBEZ_OVOGA@mudrac.ffzg.hr> - 2021-01-01 23:32 +0000
Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-02 00:52 +0000
Re: USB card adapters crash Pi4 bob prohaska <bp@www.zefox.net> - 2021-01-02 02:13 +0000
Re: USB card adapters crash Pi4 "Dave Liquorice" <allsortsnotthisbit@howhill.com> - 2021-01-02 09:49 +0000
Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-02 12:34 +0000
Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-02 12:51 +0000
Re: USB card adapters crash Pi4 Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> - 2021-01-02 13:23 +0000
Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-02 14:52 +0000
Re: USB card adapters crash Pi4 Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> - 2021-01-02 17:27 +0000
Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-02 18:05 +0000
Re: USB card adapters crash Pi4 Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> - 2021-01-02 19:45 +0000
Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-02 20:41 +0000
Re: USB card adapters crash Pi4 Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> - 2021-01-03 05:53 +0000
Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-03 14:39 +0000
Re: USB card adapters crash Pi4 Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> - 2021-01-03 15:41 +0000
Re: USB card adapters crash Pi4 Joe <joe@jretrading.com> - 2021-01-03 18:38 +0000
Re: USB card adapters crash Pi4 Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2021-01-03 19:15 +0000
Re: USB card adapters crash Pi4 The Natural Philosopher <tnp@invalid.invalid> - 2021-01-04 03:17 +0000
Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-04 11:33 +0000
Re: USB card adapters crash Pi4 Ahem A Rivet's Shot <steveo@eircom.net> - 2021-01-04 12:24 +0000
Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-04 13:58 +0000
Re: USB card adapters crash Pi4 Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2021-01-04 10:21 -0500
Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-04 15:33 +0000
Re: USB card adapters crash Pi4 Björn Lundin <b.f.lundin@gmail.com> - 2021-01-23 23:03 +0100
Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-23 22:54 +0000
Re: USB card adapters crash Pi4 Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2021-01-23 18:30 -0500
Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-24 14:42 +0000
Re: USB card adapters crash Pi4 Pancho <Pancho.Dontmaileme@outlook.com> - 2021-01-23 23:31 +0000
Re: USB card adapters crash Pi4 Scott Alfter <scott@alfter.diespammersdie.us> - 2021-01-25 17:23 +0000
Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-25 18:31 +0000
Re: USB card adapters crash Pi4 Jim H <invalid@invalid.invalid> - 2021-01-25 18:47 +0000
Re: USB card adapters crash Pi4 Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2021-01-26 10:59 -0500
Re: USB card adapters crash Pi4 Scott Alfter <scott@alfter.diespammersdie.us> - 2021-01-26 17:13 +0000
Re: USB card adapters crash Pi4 mjb@signal11.invalid (Mike) - 2021-01-26 23:11 +0000
Re: USB card adapters crash Pi4 Richard Kettlewell <invalid@invalid.invalid> - 2021-01-25 18:55 +0000
Re: USB card adapters crash Pi4 Dennis <dennis@none.none> - 2021-01-25 15:21 -0600
Re: USB card adapters crash Pi4 The Natural Philosopher <tnp@invalid.invalid> - 2021-01-24 09:36 +0000
Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-03 19:36 +0000
Re: USB card adapters crash Pi4 Joe <joe@jretrading.com> - 2021-01-03 21:16 +0000
Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-03 22:40 +0000
Re: USB card adapters crash Pi4 Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2021-01-03 20:44 -0500
Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-04 11:46 +0000
Re: USB card adapters crash Pi4 Joe <joe@jretrading.com> - 2021-01-04 09:38 +0000
Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-04 12:03 +0000
Re: USB card adapters crash Pi4 Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2021-01-04 11:01 -0500
Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-04 17:15 +0000
Re: USB card adapters crash Pi4 Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2021-01-04 14:03 -0500
Re: USB card adapters crash Pi4 Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> - 2021-01-05 06:17 +0000
Re: USB card adapters crash Pi4 Deloptes <deloptes@gmail.com> - 2021-01-02 16:06 +0100
Re: USB card adapters crash Pi4 A. Dumas <alexandre@dumas.fr.invalid> - 2021-01-02 16:36 +0000
Re: USB card adapters crash Pi4 The Natural Philosopher <tnp@invalid.invalid> - 2021-01-02 16:38 +0000
Re: USB card adapters crash Pi4 Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> - 2021-01-02 17:29 +0000
Re: USB card adapters crash Pi4 Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> - 2021-01-02 17:18 +0000
Re: USB card adapters crash Pi4 David Higton <dave@davehigton.me.uk> - 2021-01-02 20:21 +0000
Re: USB card adapters crash Pi4 Theo <theom+news@chiark.greenend.org.uk> - 2021-01-03 10:07 +0000
Re: USB card adapters crash Pi4 Theo <theom+news@chiark.greenend.org.uk> - 2021-01-03 18:39 +0000
Re: USB card adapters crash Pi4 "Dave Liquorice" <allsortsnotthisbit@howhill.com> - 2021-01-02 13:08 +0000
Re: USB card adapters crash Pi4 Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> - 2021-01-02 09:10 +0000
Re: USB card adapters crash Pi4 druck <news@druck.org.uk> - 2021-01-02 12:36 +0000
Re: USB card adapters crash Pi4 bob prohaska <bp@www.zefox.net> - 2021-01-02 20:45 +0000
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