Shrinking strategy fails with 1M free

g2p / blocks

Enable bcache or LVM on existing block devices

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Shrinking strategy fails with 1M free #27

Closed mullrich closed 9 years ago

mullrich commented 9 years ago

I'm trying to convert a partition to bcache. I created the partition some time ago using parted -s -a opt /dev/sdx mklabel gpt mkpart primary 1m 100%, so there should be 1M in front. Why does bcache fail in this case? I am aware of issue #1, but wouldn't have thought this was the problem here. Error message is The range we want to reserve overlaps with the start of a reserved area at [0, 33] (metadata), the shrinking strategy will not work. I'm on Ubuntu 14.04 (3.19), Python 3.4. Thanks!

g2p commented 9 years ago

There's GPT metadata at the start of the partition, which cannot be removed. If this is a new system, start the partition at 2M, otherwise you could use the bcache on LVM approach.