Am 12.09.22 um 23:37 schrieb Wol:
On 12/09/2022 16:04, Reindl Harald wrote:
the reason for that game is that the machines are running for 10 years
now and all the new desktop hardware can't hold 4x3.5" disks and so
just put them in a new one isn't possible
How many SATA ports does the mobo have? Can you --replace onto the new
drives (especially if it's raid-10!), then just fail the remaining two
drives?
Iirc raid-10 doesn't require the drives to be the same size, so provided
the two new drives are big enough, that should just work.
Then with just two drives you change the raid to raid-1
i had this idea also and the drives have 3 partitions in that order, two
machines 4x1TB and two machines 4x2TB
/boot is a RAID1, the other two RAIDS are RAID10
/dev/md0 ext4 482M 77M 401M 17% /boot
/dev/md1 ext4 29G 8,9G 20G 31% /
/dev/md2 ext4 3,6T 2,0T 1,7T 55% /data
/dev/md0 ext4 474M 45M 426M 10% /boot
/dev/md1 ext4 39G 22G 17G 58% /
/dev/md2 ext4 1,8T 1,1T 699G 61% /data
when i understand you correctly:
* replace two disks with double sized SSD's
* partition / and /data double sized
* "mdadm /dev/md1 --add /dev/sdcX" the double sized
* wait resync
* finally remove the two old half sized
* reshape md1 and md2 to RAID1
how would the command look for "Then with just two drives you change the
raid to raid-1"?
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BTW: currently the machines are BIOS-boot - am i right that the 2 TB
limitation only requires that the parts which are needed for booting are
on the first 2 TB and i can use 4 TB SSD's on the two bigger machines?
in that case i think i would need GPT partitioning and does GRUB2
support booting from GPT-partitioned disks in BIOS-mode?
