Re: [CentOS] Anaconda : MBR vs. GPT
Le 28/11/2020 à 18:58, Simon Matter a écrit : > I haven't a lot of experience here but I always thought the general rule > for boot disks is: classic BIOS -> MBR and UEFI -> GPT. After some more research, I think I found the definitive answer to the problem. It's a little bit more complicated. UEFI -> GPT BIOS -> MBR BIOS with disk > 2^32 sectores (2 TiB) -> GPT And searching for this, I stumbled over docs.centos.org, whose existence I ignored. Must be relatively new: https://docs.centos.org/en-US/centos/install-guide/StorageSpoke-x86/ See section "MBR and GPT considerations". Cheers, Niki -- Microlinux - Solutions informatiques durables 7, place de l'église - 30730 Montpezat Site : https://www.microlinux.fr Blog : https://blog.microlinux.fr Mail : i...@microlinux.fr Tél. : 04 66 63 10 32 Mob. : 06 51 80 12 12 ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Anaconda : MBR vs. GPT
> Hi, > > I've always been a bit puzzled by the fact that Anaconda provides no > option to > manually create a partition table and specify if it's MBR or GPT. > > From what I can tell - at least under CentOS 7.x - Anaconda will default > to > MBR, even if I specify a BIOS Boot partition. Maybe it switches > automatically > to GPT if the disk size requires it ( > 2 TB IIRC) though I don't have any > corresponding hardware here to test it. I haven't a lot of experience here but I always thought the general rule for boot disks is: classic BIOS -> MBR and UEFI -> GPT. Regards, Simon ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
[CentOS] Anaconda : MBR vs. GPT
Hi, I've always been a bit puzzled by the fact that Anaconda provides no option to manually create a partition table and specify if it's MBR or GPT. From what I can tell - at least under CentOS 7.x - Anaconda will default to MBR, even if I specify a BIOS Boot partition. Maybe it switches automatically to GPT if the disk size requires it ( > 2 TB IIRC) though I don't have any corresponding hardware here to test it. Is this documented somewhere? Or is there a nifty little trick to tell Anaconda to prefer GPT partition tables? Cheers, Niki -- Microlinux - Solutions informatiques durables 7, place de l'église - 30730 Montpezat Site : https://www.microlinux.fr Blog : https://blog.microlinux.fr Mail : i...@microlinux.fr Tél. : 04 66 63 10 32 Mob. : 06 51 80 12 12 ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Emulate Ghost4Linux with standard Linux commands?
> On Nov 28, 2020, at 7:12 AM, Nicolas Kovacs wrote: > > Le 28/11/2020 à 08:13, Nicolas Kovacs a écrit : >> Now here's the question. From within my live system, how could I compress >> my system into a compact image and then send it to a distant FTP server? > > I'll answer this myself, since I just experimented and found a strikingly > simple solution using dd and SSH (better than FTP). > > Backup the server over the network from a live rescue session: > > # dd if=/dev/sda status=progress | gzip --fast - | \ > ssh microli...@backup.microlinux.fr \ > dd of=centos-7.9-server-image.gz > > Restore this image from a live rescue session: > > # ssh microli...@backup.microlinux.fr \ > dd if=centos-7.9-server-image.gz | \ > gunzip --fast - | dd of=/dev/sda status=progress > As you mention “compress” in your question, you could also add -C flag to ssh command (to turn on compression) Valeri > Why didn't I think of this before ? > > :o) > > Niki > > -- > Microlinux - Solutions informatiques durables > 7, place de l'église - 30730 Montpezat > Site : https://www.microlinux.fr > Blog : https://blog.microlinux.fr > Mail : i...@microlinux.fr > Tél. : 04 66 63 10 32 > Mob. : 06 51 80 12 12 > ___ > CentOS mailing list > CentOS@centos.org > https://lists.centos.org/mailman/listinfo/centos ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Emulate Ghost4Linux with standard Linux commands?
Le 28/11/2020 à 08:13, Nicolas Kovacs a écrit : > Now here's the question. From within my live system, how could I compress > my system into a compact image and then send it to a distant FTP server? I'll answer this myself, since I just experimented and found a strikingly simple solution using dd and SSH (better than FTP). Backup the server over the network from a live rescue session: # dd if=/dev/sda status=progress | gzip --fast - | \ ssh microli...@backup.microlinux.fr \ dd of=centos-7.9-server-image.gz Restore this image from a live rescue session: # ssh microli...@backup.microlinux.fr \ dd if=centos-7.9-server-image.gz | \ gunzip --fast - | dd of=/dev/sda status=progress Why didn't I think of this before ? :o) Niki -- Microlinux - Solutions informatiques durables 7, place de l'église - 30730 Montpezat Site : https://www.microlinux.fr Blog : https://blog.microlinux.fr Mail : i...@microlinux.fr Tél. : 04 66 63 10 32 Mob. : 06 51 80 12 12 ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
