Resize doesnt work as expected

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hello, i have found a small issue but i doesn't know if this is intended.

Starting with a RAID 1 setup with 3 x 4GB devices.
If you replace one of this devices with a 2GB device and run "resize
max" nothing happens.
Only if you resize with the device-ID the additional GB will be usable.
Loop at this demo:
(its my first try with  loopback devices :))


[ -f /tmp_resize ] && rm -f /tmp_resize

mkdir /tmp_resize
dd if=/dev/zero of=/tmp_resize/btrfs-vol1.img bs=1G count=1
dd if=/dev/zero of=/tmp_resize/btrfs-vol2.img bs=1G count=1
dd if=/dev/zero of=/tmp_resize/btrfs-vol3.img bs=1G count=1
dd if=/dev/zero of=/tmp_resize/btrfs-vol4.img bs=1G count=1
dd if=/dev/zero of=/tmp_resize/btrfs-vol5.img bs=2G count=1

losetup /dev/loop1 /tmp_resize/btrfs-vol1.img
losetup /dev/loop2 /tmp_resize/btrfs-vol2.img
losetup /dev/loop3 /tmp_resize/btrfs-vol3.img
losetup /dev/loop4 /tmp_resize/btrfs-vol4.img
losetup /dev/loop5 /tmp_resize/btrfs-vol5.img

mkfs.btrfs -d raid1 /dev/loop1 /dev/loop2 /dev/loop3 /dev/loop4

btrfs filesystem show /dev/loop2

mkdir /media/test

mount /dev/loop3 /media/test

echo "Vorher"
btrfs fi sh

echo "Replace 1G device with 2G device"
btrfs repl start /dev/loop4 /dev/loop5 /media/test

echo "After replace, still 1GB usable"
btrfs fi sh

echo "Resize"
btrfs fi res max /media/test

echo "After resize, still 1GB usable !!!!"
btrfs fi sh

echo "Resize with device id"
btrfs fi res 4:max /media/test

echo "!!! now 2GB usable !!!!"
btrfs fi sh
--
To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Linux Filesystem Development]     [Linux NFS]     [Linux NILFS]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux