Re: change UUID of RAID devcies
From: Reindl Harald <hidden>
Date: 2022-09-13 11:12:34
Am 13.09.22 um 12:39 schrieb Pascal Hambourg:
On 13/09/2022 at 12:28, Reindl Harald wrote:quoted
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?Which 2 TB limitation ? EDD BIOS calls use 64-bit LBA and should not have any practical limitation unless the BIOS implementation is flawed.quoted
in that case i think i would need GPT partitioning and does GRUB2 support booting from GPT-partitioned disks in BIOS-mode?Yes, but it requires a "BIOS boot" partition for the core image (usually less than 100 kB, so 1 MB is plenty enough). Also some flawed BIOS require that a legacy partition entry in the protective MBR has the "boot" flag set
https://www.cyberciti.biz/tips/fdisk-unable-to-create-partition-greater-2tb.html "For example, you cannot create 3TB or 4TB partition size (RAID based) using the fdisk command. It will not allow you to create a partition that is greater than 2TB" makes me nervous how to get a > 3 TB partition for /dev/md2 -------------------- and finally how would the command look for "Then with just two drives you change the raid to raid-1"? the first two drives are ordered to start with 1 out of 4 machines ASAP given that the machine in front of me is running since 2011/06 365/24......