Re: bcache with existing ext4 filesystem

From: Theodore Ts'o
Date: Tue Jul 25 2017 - 00:52:08 EST


On Mon, Jul 24, 2017 at 10:04:51PM +0200, Pavel Machek wrote:
> Question for you was... Is the first 1KiB of each ext4 filesystem still
> free and "reserved for a bootloader"?

Yes.

> If I needed more for bcache superblock (8KiB, IIRC), would that be
> easy to accomplish on existing filesystem?

Huh? Why would the bcache superblock matter when you're talking about
the ext4 layout? The bcache superblock will be on the bcache
device/partition, and the ext4 superblock will be on the ext4
device/partition.

- Ted