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HI i try to add DRBD in centos7 with my two physical server, when i am try create drbdadm create-md drbd0

error is open(/dev/sdb3) failed: Device or resource busy is it i am mapping correct drive in my configuration can someone verify and correct em i added the both Fdisk screenshot and drbd res file

can anyone advice me or share any link ,it will great help

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  • Please copy and paste your plain text outputs and configurations as text and not images or "screenshots". I looked at your screenshots, and I don't see any mention of /dev/sdb, can you include output from lsblk?
    – Matt Kereczman
    Mar 17, 2022 at 23:27
  • @MattKereczman: [root@node2 ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 6.6T 0 disk ├─sda1 8:1 0 1.5M 0 part ├─sda2 8:2 0 1G 0 part /boot └─sda3 8:3 0 6.6T 0 part ├─centos-root 253:0 0 50G 0 lvm / ├─centos-swap 253:1 0 23.4G 0 lvm [SWAP] └─centos-home 253:2 0 6.5T 0 lvm /home sr0 11:0 1 1024M 0 rom [root@node2 ~]#
    – Ana Mal
    Mar 18, 2022 at 2:22
  • I would add things like that to your question, so it doesn't lose formatting like it does in the comments. Either way, I don't see /dev/sdb in any of that output, which is the block device you're trying to use as DRBD's backing device in the configuration.
    – Matt Kereczman
    Mar 21, 2022 at 19:51

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