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- #!/bin/bash
- function clean_up {
- umount mntpoint
- rmdir mntpoint
- losetup -d $DEV4
- losetup -d $DEV3
- losetup -d $DEV2
- losetup -d $DEV1
- rm disk1 disk2 disk3 disk4
- exit
- }
- trap clean_up SIGHUP SIGINT SIGTERM EXIT
- truncate -s 20G disk1 && \
- truncate -s 20G disk2 && \
- truncate -s 10G disk3 && \
- truncate -s 10G disk4 && \
- DEV1=$(losetup -f --show disk1) && \
- DEV2=$(losetup -f --show disk2) && \
- DEV3=$(losetup -f --show disk3) && \
- DEV4=$(losetup -f --show disk4) && \
- mkfs.btrfs -m raid1 -d raid1 $DEV1 $DEV2 && \
- mkdir mntpoint && \
- mount $DEV1 mntpoint -odevice=$DEV2 && \
- dd if=/dev/zero of=mntpoint/testfile bs=1M count=17000 && \
- umount mntpoint && \
- btrfs filesystem show $DEV1 && \
- losetup -d $DEV2 && \
- mount $DEV1 mntpoint -odegraded && \
- btrfs device add $DEV3 $DEV4 mntpoint && \
- btrfs device delete missing mntpoint
- btrfs filesystem show $DEV1
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