Mike Lovell wrote:
Yan Seiner wrote:
I have a drbd device that I want to convert back to the underlying md
device. Is there some way to do that in place? Or do I have to move
all of the data off the device and reformat?
And how do I reformat the device to remove all of the drbd info?
i don't think you have to do anything to be able to use the underlying
md device except stopping drbd and unloading the kernel modules. once
drbd is off, you should be able to mount and use any filesystems you
have on the md device without any changes.
i wouldn't bother trying to remove the drbd metadata because it is
using a small portion of the disk. i haven't done it before and it
sounds kind of risky. iirc, it is only a couple megabytes of space for
hundreds of gigabytes of capacity. this is going to gain so little
space back i wouldn't risk it. i would just stop drbd, remove the
disks from drbd.conf, and use the device normally.
Exactly correct. Being paranoid, I backed up the entire partition, then
rebooted the machine making sure drbd would not start. I could access
the data with no problem.
This does beg a question, though.
I start drbd and then run fsck on the drbd device. It would be faster
to run fsck on the underlying file system, and then start drbd. That
would make life easier as one could do all the file operations before
even starting the network at boot.
Is this advisable?
--Yan
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