Hi! Here's a set of test cases, two of them in some cases seem to scribble upon the wrong device:
* deg-mid-missing * deg-last-replaced (not on the innocent "re") * but never deg-last-missing When all goes ok, there are no errors other than wrong generation on the re-added disk (expected). When it goes bad, there's a lot of corruption. In all cases, though, the "Device missing:" field is wrong. I'm not yet sure how to trigger this, perhaps someone would have a clue? 8:30am, hitting the sack, will try again todorrow. Meow! -- ⢀⣴⠾⠻⢶⣦⠀ ⣾⠁⢠⠒⠀⣿⡁ A dumb species has no way to open a tuna can. ⢿⡄⠘⠷⠚⠋⠀ A smart species invents a can opener. ⠈⠳⣄⠀⠀⠀⠀ A master species delegates.
#!/bin/sh set -e set -x umount /mnt/vol1 ||: losetup -D dd if=/dev/zero bs=1048576 count=1 seek=4095 of=ra dd if=/dev/zero bs=1048576 count=1 seek=4095 of=rb dd if=/dev/zero bs=1048576 count=1 seek=4095 of=rc dd if=/dev/zero bs=1048576 count=1 seek=4095 of=rd mkfs.btrfs -draid1 -mraid1 ra rb rc rd losetup -D losetup -f ra losetup -f rb losetup -f rc losetup -f rd sleep 1 mount /dev/loop0 /mnt/vol1 cp -pr /bin /mnt/vol1 btrfs fi sync /mnt/vol1 btrfs fi us /mnt/vol1 umount /mnt/vol1 losetup -D losetup -f ra losetup -f rb losetup -f rd sleep 1 mount -odegraded /dev/loop0 /mnt/vol1 btrfs fi us /mnt/vol1 dd if=/dev/zero of=/mnt/vol1/foo bs=1048576 count=2222 umount /mnt/vol1 losetup -D losetup -f ra losetup -f rb losetup -f rc losetup -f rd sleep 1 mount /dev/loop0 /mnt/vol1 btrfs scrub start -B /mnt/vol1
#!/bin/sh set -e set -x umount /mnt/vol1 ||: losetup -D dd if=/dev/zero bs=1048576 count=1 seek=4095 of=ra dd if=/dev/zero bs=1048576 count=1 seek=4095 of=rb dd if=/dev/zero bs=1048576 count=1 seek=4095 of=rc dd if=/dev/zero bs=1048576 count=1 seek=4095 of=rd mkfs.btrfs -draid1 -mraid1 ra rb rc rd losetup -D losetup -f ra losetup -f rb losetup -f rc losetup -f rd sleep 1 mount /dev/loop0 /mnt/vol1 cp -pr /bin /mnt/vol1 btrfs fi sync /mnt/vol1 btrfs fi us /mnt/vol1 umount /mnt/vol1 losetup -D losetup -f ra losetup -f rb losetup -f rc sleep 1 mount -odegraded /dev/loop0 /mnt/vol1 btrfs fi us /mnt/vol1 dd if=/dev/zero of=/mnt/vol1/foo bs=1048576 count=2222 umount /mnt/vol1 losetup -D losetup -f ra losetup -f rb losetup -f rc losetup -f rd sleep 1 mount /dev/loop0 /mnt/vol1 btrfs scrub start -B /mnt/vol1
#!/bin/sh set -e set -x umount /mnt/vol1 ||: losetup -D dd if=/dev/zero bs=1048576 count=1 seek=4095 of=ra dd if=/dev/zero bs=1048576 count=1 seek=4095 of=rb dd if=/dev/zero bs=1048576 count=1 seek=4095 of=rc dd if=/dev/zero bs=1048576 count=1 seek=4095 of=rd dd if=/dev/zero bs=1048576 count=1 seek=4095 of=re mkfs.btrfs -draid1 -mraid1 ra rb rc rd losetup -D losetup -f ra losetup -f rb losetup -f rc losetup -f rd sleep 1 mount /dev/loop0 /mnt/vol1 cp -pr /bin /mnt/vol1 btrfs fi sync /mnt/vol1 btrfs fi us /mnt/vol1 umount /mnt/vol1 losetup -D losetup -f ra losetup -f rb losetup -f rc losetup -f re sleep 1 mount -odegraded /dev/loop0 /mnt/vol1 btrfs fi us /mnt/vol1 dd if=/dev/zero of=/mnt/vol1/foo bs=1048576 count=2222 umount /mnt/vol1 losetup -D losetup -f ra losetup -f rb losetup -f rc losetup -f rd sleep 1 mount /dev/loop0 /mnt/vol1 btrfs scrub start -B /mnt/vol1
