Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > alt.os.linux > #33095
| From | blind Pete <0123peter@gmail.com> |
|---|---|
| Newsgroups | alt.os.linux |
| Subject | Re: UEFI question |
| Date | 2016-01-01 21:20 +1100 |
| Organization | A noiseless patient Spider |
| Message-ID | <jf0ilc-fk8.ln1@psd.motzarella.org> (permalink) |
| References | <n60hg5$h8a$1@dont-email.me> <n60j2j$2chn$1@saria.nerim.net> <n60khc$rip$1@dont-email.me> |
crankypuss wrote: > Pascal Hambourg wrote: > >> Hello, >> >> crankypuss a écrit : >>> from, >>> http://adam8157.info/blog/2015/04/hybrid-bootable-usb-stick-for-uefi-and-legacy-bios >>> >>> "Legacy BIOS needs bootloaders to be installed into MBR >> >> Yes. >> >>> and the reserved space after it. >> >> No. Anywhere else is fine too. >> >>> UEFI only needs bootloaders in ESP(EFI System Partition). >> >> Yes. >> >>> There is no resource competition between legacy BIOS and UEFI >>> requirements." >> >> Yes, in theory. But practice may be different due to BIOS and UEFI >> implementations. Agreed, and you have to expect to trip over twice as many firmware bugs - that might interact in interesting ways. > Thanks Pascal. > > I recognize that there are broken firmware implementations, that's how > you learn which makers to avoid. <g> > > From the theoretical correctness of those statements, I tend to conclude > that a legacy BIOS system will remain unaffected by the presence/absence > of an ESP, it's just some other partition not to be concerned with. > However, the ESP only appears in GPT tables (doesnt' it?), so there's a > question of whether (all non-broken) legacy BIOS systems will boot from > a GPT-formatted device (and I've heard anecdotal comments that lead me > to believe they will, but I haven't yet validated that myself). Legacy BIOS firmware or UEFI firmware in legacy mode? It is possible to prepare a hybrid drive that looks like an MSDOS partitioned drive to a legacy BIOS, but is usable as a GPT drive. Such things are generally regarded as unreliable abominations. > It also leads me to conclude that (non-broken) UEFI firmware recognizes > the ESP, but it's unclear whether it navigates the filesystem within the > ESP or simply recognizes it by some set of flags and runs a first-stage > loader from the recognized partition? UEFI is required to recognize a fork of VFAT, but may recognize more. -- blind Pete Sig goes here...
Back to alt.os.linux | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
UEFI question crankypuss <invalid@invalid.invalid> - 2015-12-30 05:11 -0700
Re: UEFI question Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2015-12-30 13:35 +0100
Re: UEFI question crankypuss <invalid@invalid.invalid> - 2015-12-30 06:03 -0700
Re: UEFI question Bit Twister <BitTwister@mouse-potato.com> - 2015-12-30 13:48 +0000
Re: UEFI question crankypuss <invalid@invalid.invalid> - 2015-12-30 14:10 -0700
Re: UEFI question "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2015-12-30 16:26 -0500
Re: UEFI question Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2015-12-31 10:21 +0100
Re: UEFI question "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2015-12-31 08:50 -0500
Re: UEFI question Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2015-12-31 16:19 +0100
Re: UEFI question crankypuss <invalid@invalid.invalid> - 2015-12-31 11:51 -0700
Re: UEFI question Bit Twister <BitTwister@mouse-potato.com> - 2015-12-31 19:34 +0000
Re: UEFI question Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2015-12-31 21:52 +0100
Re: UEFI question "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2016-01-01 18:58 -0500
Re: UEFI question Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2016-01-02 02:19 +0100
Re: UEFI question blind Pete <0123peter@gmail.com> - 2016-01-03 16:30 +1100
Re: UEFI question Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2016-01-03 11:12 +0100
Re: UEFI question Eef Hartman <E.J.M.Hartman@gmail.com> - 2016-01-03 12:44 +0000
Re: UEFI question Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2016-01-03 15:16 +0100
Re: UEFI question blind Pete <0123peter@gmail.com> - 2016-01-03 23:12 +1100
Re: UEFI question Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2016-01-03 15:22 +0100
Re: UEFI question crankypuss <invalid@invalid.invalid> - 2016-01-02 01:53 -0700
Re: UEFI question Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2016-01-02 12:08 +0100
Re: UEFI question crankypuss <invalid@invalid.invalid> - 2016-01-02 10:47 -0700
Re: UEFI question crankypuss <invalid@invalid.invalid> - 2015-12-31 02:37 -0700
Re: UEFI question Bit Twister <BitTwister@mouse-potato.com> - 2015-12-30 22:18 +0000
Re: UEFI question Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2015-12-31 10:16 +0100
Re: UEFI question crankypuss <invalid@invalid.invalid> - 2015-12-31 02:46 -0700
Re: UEFI question blind Pete <0123peter@gmail.com> - 2016-01-01 21:20 +1100
Re: UEFI question crankypuss <invalid@invalid.invalid> - 2016-01-01 05:08 -0700
Re: UEFI question Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2016-01-01 21:51 +0100
Re: UEFI question crankypuss <invalid@invalid.invalid> - 2016-01-01 15:17 -0700
Re: UEFI question Bit Twister <BitTwister@mouse-potato.com> - 2016-01-01 23:06 +0000
Re: UEFI question crankypuss <invalid@invalid.invalid> - 2016-01-02 02:16 -0700
Re: UEFI question Bit Twister <BitTwister@mouse-potato.com> - 2016-01-02 10:04 +0000
Re: UEFI question crankypuss <invalid@invalid.invalid> - 2016-01-02 03:39 -0700
Re: UEFI question blind Pete <0123peter@gmail.com> - 2016-01-03 15:20 +1100
Re: UEFI question blind Pete <0123peter@gmail.com> - 2016-01-03 15:14 +1100
csiph-web