Re: Dual Root setup

2023-03-04 Thread Genes Lists
On 3/4/23 18:22, Genes Lists wrote: But your cautionary comment is definitely something to keep an eye on. I already have these concerns noted at the bottom of the notes - since you pointed it out, It would be better for me to highlight them and move them earlier in the notes. thanks aga

Re: Dual Root setup

2023-03-04 Thread Genes Lists
On 3/4/23 18:08, Łukasz Michalski wrote: I have this setup on all servers that do not have battery backed HW raid cards and use mdadm there. I use systemd-boot as bootloader. Works well and can be done on existing system with just a single reboot. It is not easy - you have to create degraded r

Re: Dual Root setup

2023-03-04 Thread Łukasz Michalski
On 3/4/23 19:37, Genes Lists wrote: On 3/4/23 13:21, Uwe Sauter wrote: The usual Linux MD-RAID can have its metadata placed on different positions in the partition (see man (8) mdadm, option "-e, --metadata"). Knowing this it is no problem to create a partition on each disk of type EF00,

Re: Dual Root setup

2023-03-04 Thread Genes Lists
On 3/4/23 13:21, Uwe Sauter wrote: The usual Linux MD-RAID can have its metadata placed on different positions in the partition (see man (8) mdadm, option "-e, --metadata"). This is intriguing for sure but to be honest it has a bit of a brittle, hacky feel to it. My own preference is to

Re: Dual Root setup

2023-03-04 Thread Genes Lists
On 3/4/23 13:21, Uwe Sauter wrote: The usual Linux MD-RAID can have its metadata placed on different positions in the partition (see man (8) mdadm, option "-e, --metadata"). Knowing this it is no problem to create a partition on each disk of type EF00, create a RAID1 with metadata version

Re: Dual Root setup

2023-03-04 Thread Uwe Sauter
Am 04.03.23 um 19:05 schrieb Genes Lists: On 3/4/23 13:00, Uwe Sauter wrote: Hi Gene, out of curiosity: where do you see the advantages of such a setup compared to having your root filesystem on a RAID1? , Could be wrong, but I don't believe the is on RAID1 is it? Dual root is dual eve

Re: Dual Root setup

2023-03-04 Thread Genes Lists
On 3/4/23 13:05, Genes Lists wrote: Could be wrong, but I don't believe the is on RAID1 is it? Dual root is dual everything - esp, root, boot, the whole lot. You can clearly have an esp on each raid disk, so this could work as well - recovery might be little different than what I did but se

Re: Dual Root setup

2023-03-04 Thread Genes Lists
On 3/4/23 13:00, Uwe Sauter wrote: Hi Gene, out of curiosity: where do you see the advantages of such a setup compared to having your root filesystem on a RAID1? , Could be wrong, but I don't believe the is on RAID1 is it? Dual root is dual everything - esp, root, boot, the whole lot.

Re: Dual Root setup

2023-03-04 Thread Uwe Sauter
Hi Gene, out of curiosity: where do you see the advantages of such a setup compared to having your root filesystem on a RAID1? Regards, Uwe Am 04.03.23 um 18:56 schrieb Genes Lists: I know there's lots of info available about dual boot - but not much I could find on Dual Root. Wha

Dual Root setup

2023-03-04 Thread Genes Lists
I know there's lots of info available about dual boot - but not much I could find on Dual Root. What is Dual Root? This is a machine with 2 "root" disks where the second one is a hot standby - in event of root disk failure the second disk can be booted very quickly. This makes recoverin