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Groups > linux.debian.user > #202700
| From | Pascal Hambourg <pascal@plouf.fr.eu.org> |
|---|---|
| Newsgroups | linux.debian.user |
| Subject | Re: Unable to boot BIOS/GPT system. |
| Date | 2018-11-23 00:10 +0100 |
| Message-ID | <wX6gF-1m3-9@gated-at.bofh.it> (permalink) |
| References | <wX1TH-6Z7-1@gated-at.bofh.it> <wX2PL-7z4-1@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
Le 22/11/2018 à 20:19, Steve McIntyre a écrit : > quantera@gmail.com wrote: >> >> I am trying to install Debian on a 4TB external HDD. Since I want >> to boot the HDD (also) on old systems which support only BIOS, >> and since the HDD is larger than 2TB, I decided to go with GPT >> partition table and BIOS boot (or, in other words: BIOS/GTP). >> I partitioned the HDD accordingly (see the details below), and >> installed Debian. During a pre-installation configuration the >> installer recognized BIOS boot partition, I configured the root >> partition as ext4 and installed grub into the disk's MBR. But >> when (after an installation) I am trying to boot the HDD, I receive >> an error message: 'error: unknown filesystem' and drop into a >> grub rescue mode. >> >> What is the problem here and how it can be solved? It seems as >> though grub's Stage 1.5 loader (that is - core.img, which is >> supposed to be embedded in BIOS boot partition) doesn't contain >> modules needed to read ext4 filesystem, which seems very strange. > > ... > >> Number Start End Size File system Name Flags >> 1 1.00MiB 2.00MiB 1.00MiB bios_grub >> 2 2.00MiB 16000MiB 15998MiB linux-swap(v1) >> 3 16000MiB 3815414MiB 3799414MiB > > I'd expect that Grub won't be able to reliably work with that setup - > partition 3 goes past the 2TB mark, so the BIOS won't be able to map > it properly. Don't forget, when grub is reading the disk all it can > rely on are BIOS calls. Add yourself a small-ish /boot partition first > and you may be OK. The limit of EDD BIOS calls which uses 64 bit LBA addressing is way beyond 2 TiB. But that specific BIOS implementation may be broken and unable to read beyond that limit. So indeed a boot or root partition at the beginning of the disk may help.
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Unable to boot BIOS/GPT system. Daniel Fishman <quantera@gmail.com> - 2018-11-22 19:30 +0100
Re: Unable to boot BIOS/GPT system. Daniel Fishman <quantera@gmail.com> - 2018-11-22 20:10 +0100
Re: Unable to boot BIOS/GPT system. Georgi Naplatanov <gosho@oles.biz> - 2018-11-22 20:40 +0100
Re: Unable to boot BIOS/GPT system. Daniel Fishman <quantera@gmail.com> - 2018-11-22 21:40 +0100
Re: Unable to boot BIOS/GPT system. Georgi Naplatanov <gosho@oles.biz> - 2018-11-22 20:10 +0100
Re: Unable to boot BIOS/GPT system. Steve McIntyre <steve@einval.com> - 2018-11-22 20:30 +0100
Re: Unable to boot BIOS/GPT system. Daniel Fishman <quantera@gmail.com> - 2018-11-22 21:30 +0100
Re: Unable to boot BIOS/GPT system. Pascal Hambourg <pascal@plouf.fr.eu.org> - 2018-11-23 07:40 +0100
Re: Unable to boot BIOS/GPT system. "Thomas Schmitt" <scdbackup@gmx.net> - 2018-11-23 09:20 +0100
Re: Unable to boot BIOS/GPT system. Pascal Hambourg <pascal@plouf.fr.eu.org> - 2018-11-23 21:10 +0100
Re: Unable to boot BIOS/GPT system. Pascal Hambourg <pascal@plouf.fr.eu.org> - 2018-11-23 00:10 +0100
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