i have this structure of hdd on my server:
fdisk -l
Disk /dev/sda: 2.7 TiB, 3000592982016 bytes, 5860533168 sectors
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: gpt
Disk identifier: EA206948-7BBC-4AD9-8835-40746D07F575
Device Start End Sectors Size Type
/dev/sda1 40 2048 2009 1004.5K BIOS boot
/dev/sda2 4096 409602047 409597952 195.3G Linux RAID
Disk /dev/sdb: 2.7 TiB, 3000592982016 bytes, 5860533168 sectors
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: gpt
Disk identifier: D2514683-E466-41C0-82AD-44635CA12AE8
Device Start End Sectors Size Type
/dev/sdb1 40 2048 2009 1004.5K BIOS boot
/dev/sdb2 4096 409602047 409597952 195.3G Linux RAID
Disk /dev/md2: 195.3 GiB, 209714085888 bytes, 409597824 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
How you can see total size of my hdd-s - 2,7T. Also, i have program raid for /. This is /dev/sda2 and /dev/sdb2. How i can create other partition with /dev/sda3 and /dev/sdb3 with size 500GB on both disks and make Linux RAID 1, like i am using on /dev/sda2 and /dev/sdb2 ?
I tried with using of fdisk. I made two partitions with 500GB for each. I made mdadm:
mdadm --create /dev/md3 --metadata=0.90 --level=mirror --raid-devices=2 /dev/sda3 /dev/sdb3
and i added ARRAY /dev/md3 UUID=3a5d7bb4:7f8f4e1f:a4d2adc2:26fd5302 to /etc/mdadm/mdadm.conf. also i added my /dev/md3 to fstab, but after reboot, my system was not loaded. Where i have error ? How can i do this operation ? How can i do to have for /dev/sda3 and /dev/sdb3 Linux Raid and not Linux filesystem
but after reboot, my system was not loaded.what exactly was the error? What do you mean by 'not loaded'? Did the system not boot at all, or what? What Linux distro? For some, you might need to regenerated your initrd, when updating your mdadm.conf.