From: Marco Lorenzo Crociani <marcoc@prismatelecomtesting.com>
To: linux-btrfs@vger.kernel.org
Subject: Wrong df Avail space on three disk RAID1 when empty
Date: Tue, 2 Feb 2016 15:16:40 +0100 [thread overview]
Message-ID: <56B0BA48.6070603@prismatelecomtesting.com> (raw)
Hi,
df on btrfs RAID1 fs on 3 disks (they are RAID0 hardware, two disk,
arrays but its not important right?) show wrong avail space when empty
# uname -a
Linux kvm4.prisma 4.4.0-2.el7.elrepo.x86_64 #1 SMP Tue Jan 26 13:06:01
EST 2016 x86_64 x86_64 x86_64 GNU/Linux
# btrfs --version
btrfs-progs v4.4
# btrfs fi show
Label: 'data' uuid: 4421464d-479c-44c4-9f01-8df0f7d05bd2
Total devices 3 FS bytes used 640.00KiB
devid 1 size 7.28TiB used 2.00GiB path /dev/sdb
devid 2 size 7.28TiB used 2.01GiB path /dev/sdc
devid 3 size 7.28TiB used 2.01GiB path /dev/sdd
# btrfs fi df /data
Data, RAID1: total=1.00GiB, used=512.00KiB
System, RAID1: total=8.00MiB, used=16.00KiB
Metadata, RAID1: total=2.00GiB, used=112.00KiB
GlobalReserve, single: total=16.00MiB, used=0.00B
I expect to get from df -h some like
Filesystem Size Used Avail Use% Mounted on
/dev/sdb 11T 17M 11T 1% /data
but I get:
Filesystem Size Used Avail Use% Mounted on
/dev/sdb 11T 17M 7,3T 1% /data
If I fill the fs
# ls -laht
totale 11T
-rw-r--r--. 1 root root 921G 1 feb 16.17 prova10
drwxr-xr-x. 1 root root 134 1 feb 15.23 .
-rw-r--r--. 1 root root 1,0T 1 feb 14.00 prova9
-rw-r--r--. 1 root root 1,0T 1 feb 13.07 prova8
-rw-r--r--. 1 root root 1,0T 1 feb 12.20 prova7
-rw-r--r--. 1 root root 1,0T 28 gen 21.50 prova6
-rw-r--r--. 1 root root 1,0T 28 gen 21.08 prova5
-rw-r--r--. 1 root root 1,0T 28 gen 20.28 prova4
-rw-r--r--. 1 root root 1,0T 28 gen 19.50 prova3
-rw-r--r--. 1 root root 1,0T 28 gen 19.13 prova2
-rw-r--r--. 1 root root 1,0T 28 gen 18.37 prova1
-rw-r--r--. 1 root root 1,0T 28 gen 18.02 prova0
dr-xr-xr-x. 18 root root 4,0K 28 gen 15.30 ..
I get:
Filesystem Size Used Avail Use% Mounted on
/dev/sdb 11T 11T 256K 100% /data
# btrfs fi df /data/
Data, RAID1: total=10.90TiB, used=10.90TiB
System, RAID1: total=8.00MiB, used=1.50MiB
Metadata, RAID1: total=13.00GiB, used=11.24GiB
GlobalReserve, single: total=512.00MiB, used=0.00B
--
Marco Crociani
Prisma Telecom Testing S.r.l.
via Petrocchi, 4 20127 MILANO ITALY
Phone: +39 02 26113507
Fax: +39 02 26113597
e-mail: marcoc@prismatelecomtesting.com
web: http://www.prismatelecomtesting.com
next reply other threads:[~2016-02-02 14:23 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-02 14:16 Marco Lorenzo Crociani [this message]
2016-02-02 14:35 ` Wrong df Avail space on three disk RAID1 when empty Hugo Mills
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=56B0BA48.6070603@prismatelecomtesting.com \
--to=marcoc@prismatelecomtesting.com \
--cc=linux-btrfs@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.