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diff --git a/zarb-ml/mageia-discuss/2012-August/008547.html b/zarb-ml/mageia-discuss/2012-August/008547.html new file mode 100644 index 000000000..6c4527c52 --- /dev/null +++ b/zarb-ml/mageia-discuss/2012-August/008547.html @@ -0,0 +1,139 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> +<HTML> + <HEAD> + <TITLE> [Mageia-discuss] UEFI and Secure Boot + </TITLE> + <LINK REL="Index" HREF="index.html" > + <LINK REL="made" HREF="mailto:mageia-discuss%40mageia.org?Subject=Re%3A%20%5BMageia-discuss%5D%20UEFI%20and%20Secure%20Boot&In-Reply-To=%3C50362443.6060505%40laposte.net%3E"> + <META NAME="robots" CONTENT="index,nofollow"> + <META http-equiv="Content-Type" content="text/html; charset=us-ascii"> + <LINK REL="Previous" HREF="008546.html"> + <LINK REL="Next" HREF="008549.html"> + </HEAD> + <BODY BGCOLOR="#ffffff"> + <H1>[Mageia-discuss] UEFI and Secure Boot</H1> + <B>andre999</B> + <A HREF="mailto:mageia-discuss%40mageia.org?Subject=Re%3A%20%5BMageia-discuss%5D%20UEFI%20and%20Secure%20Boot&In-Reply-To=%3C50362443.6060505%40laposte.net%3E" + TITLE="[Mageia-discuss] UEFI and Secure Boot">andre999mga at laposte.net + </A><BR> + <I>Thu Aug 23 14:38:27 CEST 2012</I> + <P><UL> + <LI>Previous message: <A HREF="008546.html">[Mageia-discuss] UEFI and Secure Boot +</A></li> + <LI>Next message: <A HREF="008549.html">[Mageia-discuss] UEFI and Secure Boot +</A></li> + <LI> <B>Messages sorted by:</B> + <a href="date.html#8547">[ date ]</a> + <a href="thread.html#8547">[ thread ]</a> + <a href="subject.html#8547">[ subject ]</a> + <a href="author.html#8547">[ author ]</a> + </LI> + </UL> + <HR> +<!--beginarticle--> +<PRE>Morgan Leijström a écrit : +><i> onsdagen den 22 augusti 2012 21.43.07 skrev Rene Rasmussen: +</I>>><i> On Wed, 22 Aug 2012 19:51:31 +0100, Maurice Batey wrote: +</I>>>><i> On Wed, 22 Aug 2012 18:35:09 +0100, Anne Wilson wrote: +</I>>>>><i> To be honest, I'm not competent to start replacing chips on +</I>>>>><i> a RAM board, either. +</I>>>>><i> +</I>>>><i> It's a bit scary the first time, but if you follow one of the +</I>>>><i> +</I>>>><i> really helpful video clips out there on the 'net, it's not a big +</I>>>><i> deal. +</I>>>><i> +</I>>>><i> The main importance (apart from using the correct chip!) is to keep +</I>>>><i> your fingers from direct contact with the chip, to avoid any static +</I>>>><i> charge jumping across. +</I>><i> +</I>><i> To this point i do not fully agree; Metal tools give much stronger discharge +</I>><i> than fingers. But a reason to avoid toucing is to avoid contaminating around +</I>><i> pins with sweat (salt, acid), fat and other dirt. +</I>><i> +</I>><i> I have conductive plastic pliers for component handling, but they do not have +</I>><i> such firm grip as metal pliers. +</I>><i> +</I>><i> Then there are more expensive metalpliers with conductive plastic handles +</I>><i> +</I>><i> (conductive in this case means very very sightlyu conductive not measureabla +</I>><i> using standard multimeter, as it should avoid hard discharge, - just slowly +</I>><i> bleed away the charge) +</I>><i> +</I>><i> None of the options described is as important as avoiding charges to build up. +</I>><i> +</I>><i> In my workshop (i build electronics prototypes) i avoid clothes of synthetic +</I>><i> fabric, wear conductive slippers - if any, have conductive carpet, and +</I>><i> conductive mat on the relevant tables. But those are expensive is sold as +</I>><i> such. I have measured some cheaper rubber mats are good too. +</I>><i> +</I>><i> The less expensive approach is to use a wristband. +</I>><i> A plus is to avoid sunthetic clothing, and you could work on such pink bubble +</I>><i> palstic wrapping some electronics come with, it is antistatic. Avoid metal +</I>><i> and plastic table, prefer untreated wood. +</I>><i> +</I>>><i> +</I>>><i> Or set up an anti-static workplace. That would be the correct thing to +</I>>><i> do. +</I>>><i> Static discharges are probably responsible for 90% of all electronics +</I>>><i> going bad. +</I>><i> +</I>><i> (not counting design errors. My favourite complaint is that designers put +</I>><i> eletrolytics unecerrarily close to hot components - the most common repair we +</I>><i> do is to replace such.) +</I>><i> +</I>><i> ESD damages are not always immediately noticeable, but often age the component +</I>><i> so it have less life left (simply speaking) +</I>><i> +</I>>><i> I never touch any of my computer or electronics parts without my ESD +</I>>><i> wristband securely connected to my workspace. +</I>>><i> (having worked with electronics professionally for most of my life has +</I>>><i> taught me that!) +</I> +Sounds like good advice for 20 or 30 years ago, before chips normally had +tristate buffers and a common floor covering was those polyestre carpets which +were so good for rubbing your feet on so you could give an unsuspecting victim +a shock by touching them. +Chip technology has advanced enormously. Much circuitry is wave-soldered to +the process board, thus even more immune to static discharge and dirt. +And those cheap static-producing carpets are a lot rarer. +Single chips with delicate pins are also a lot rarer. +Static charge is more likely to disrupt a functioning system, rather than cause +any physical damage. + +I'd say the biggest risk to electronics today is damaging a process board by +flexing it too much. +I'd prefer a soft cardboard surface to anything else. (Protects both the +surface beneath and the electronics, and doesn't create a static charge.) + +>><i> +</I>>><i> regards, +</I>>><i> Rene +</I>>><i> +</I> +-- +André +</PRE> + + + +<!--endarticle--> + <HR> + <P><UL> + <!--threads--> + <LI>Previous message: <A HREF="008546.html">[Mageia-discuss] UEFI and Secure Boot +</A></li> + <LI>Next message: <A HREF="008549.html">[Mageia-discuss] UEFI and Secure Boot +</A></li> + <LI> <B>Messages sorted by:</B> + <a href="date.html#8547">[ date ]</a> + <a href="thread.html#8547">[ thread ]</a> + <a href="subject.html#8547">[ subject ]</a> + <a href="author.html#8547">[ author ]</a> + </LI> + </UL> + +<hr> +<a href="https://www.mageia.org/mailman/listinfo/mageia-discuss">More information about the Mageia-discuss +mailing list</a><br> +</body></html> |