Am 13.09.22 um 14:47 schrieb Pascal Hambourg:
On 13/09/2022 at 14:21, Reindl Harald wrote:
Am 13.09.22 um 14:03 schrieb Pascal Hambourg:
On 13/09/2022 at 13:50, Reindl Harald wrote:
Am 13.09.22 um 13:48 schrieb Pascal Hambourg:
Legacy boot on GPT has some requirements, but it works
but we are talking about a LIVE-migration/reshape of existing disks
with no place left for another partition
So what ? Aren't you going to create a GPT partition table on your
4-TB drives ? Else you won't be able to use the space beyond 2 TiB. (*)
A GPT partition table supports up to 128 partitions by default.
i won't have a choice as it looks like and so the easiest choice would
be migrate /boot completly to a USB-stick and simply ignore the
current /boot RAID1 which is just 482M small
I don't see how it is easier. Also, USB sticks are not reliable
relieble enough for /boot and given that i run a HP microserver with the
whole OS on a USB stick since 2016 to have only the RAID10 data on the 4
drives....
However you are right that you can get rid of the current /boot array; I
don't see the need for a separate /boot, its contents could be included
in the root filesystem.
and the initrd lives where?
chicken / egg
since finally the new machines in the next step only support UEFI and
the uefi-system partition can't live on a RAID it would end there over
time anyways
Software is not natively supported by EFI boot but there are a few
tricks to set up a redundant EFI boot: create independent EFI partitions
on each disk, or create a RAID 1 array with metadata 1.0 (at the end of
the partition) so that the UEFI firmware can see each RAID partition as
a normal EFI partition with a FAT filesystem.
sounds all not appealing
so for now my last remaining question is "how would the command look
for "Then with just two drives you change the raid to raid-1"
I would not convert existing arrays. Rather create new arrays on the new
disks and copy the data
i want my identical machines to stay as they are with all their UUIDs
which is the main topic here
it's not funny when you are used to rsync your /etc/fstab over 11 years
that doing so would lead in a unbootbale system on the other side
in a perfect world new hardware would still support 4 SATA drives and
UEFI would be able to boot from a RAID1 like BIOS-boot does no matter
which of the 4 drives are there and the hardware replacement would be
insert the 4 old disks and power on
all that new crap sucks completly
