Am 13.09.22 um 13:35 schrieb Pascal Hambourg:
On 13/09/2022 at 13:30, Reindl Harald wrote:
Am 13.09.22 um 13:17 schrieb Pascal Hambourg:
On 13/09/2022 at 13:12, Reindl Harald wrote:
Am 13.09.22 um 12:39 schrieb Pascal Hambourg:
On 13/09/2022 at 12:28, Reindl Harald wrote:
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.
(...)
"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
This is a DOS/MBR partition scheme limitation, not a BIOS limitation,
and irrelevant with GPT partition scheme.
how to get a > 3 TB partition for /dev/md2
Use GPT
yeah but the goal is to convert a existing RAID1/RAID10/RAID10 setup
with 4x2 TB drives to RAID1/RAID1/RAID1 with 2x4 Tb drives and so my
/boot won't work with GPT :-)
Why wouldn't your /boot work with GPT ? It works for me
because you said so?
[root@srv-rhsoft:~]$ fdisk -l /dev/sda
Disk /dev/sda: 1.82 TiB, 2000398934016 bytes, 3907029168 sectors
Disk model: Samsung SSD 860
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x000d9ef2
Device Boot Start End Sectors Size Id Type
/dev/sda1 * 2048 1026047 1024000 500M fd Linux raid
autodetect
/dev/sda2 1026048 31746047 30720000 14.6G fd Linux raid
autodetect
/dev/sda3 31746048 3906971647 3875225600 1.8T fd Linux raid
autodetect
-------- Weitergeleitete Nachricht --------
Betreff: Re: change UUID of RAID devcies
Datum: Tue, 13 Sep 2022 12:39:50 +0200
Von: Pascal Hambourg <pascal@xxxxxxxxxxxxxxx>
An: Reindl Harald <h.reindl@xxxxxxxxxxxxx>, Linux RAID Mailing List
<linux-raid@xxxxxxxxxxxxxxx>
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.
