-------- Original Message --------
Subject: Re: Problem converting data raid0 to raid1: enospc errors
during balance
From: Chris Murphy <li...@colorremedies.com>
To: Qu Wenruo <quwen...@cn.fujitsu.com>
Date: 2014年10月27日 12:40
On Oct 26, 2014, at 7:40 PM, Qu Wenruo <quwen...@cn.fujitsu.com> wrote:
Hi,
Although I'm not completely sure, but it seems that, you really ran out of
space.
[1] Your array won't hold raid1 for 1.97T data
Your array used up 1.97T raid0 data, it takes 1.97T for raid0.
But if converted to 1.97T, it will occupy 1.97T X2 = 3.94T.
Your array are only 2.73T, it is too small to contain the data.
I'm not understanding. The btrfs fi show, shows 4x 2.73TiB devices, so that
seems like it's a 10+TiB array.
There's 2.04TiB raid0 data chunks, so roughly 500GiB per device, yet 1.94TiB is
reported used per device by fi show. Confusing.
Also it's still very confusing: Data, RAID1: total=2.85TiB, used=790.46GiB
whether this means 2.85TiB out of 10TiB is allocated, or if it's twice that due
to raid1. I can't ever remember this presentation detail, so again the secret
decode ring where the UI doesn't expressly tell us what's going on is going to
continue to be a source of confusion for users.
Chris Murphy
Oh, I misread the output....
That turns strange now....
BTW what's the output of 'df' command?
Thanks,
Qu
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