Re: [DRBD-user] drbd 35Tb disk with ext4

Dirk Bonenkamp - ProActive Tue, 28 May 2013 03:23:00 -0700

Title: ProActive Software

No, that's only the case when you want to use dual primary mode.

I'm not sure how things work with existing data on a partition, never did that. Maybe someone else can say something about that.

Cheers,

Dirk

Op 28-5-2013 11:50, Steve Kieu schreef:

I believe that you need a network filesystem on top of DRDB rather.

Example like Redhat GFS, ocfs2 etc..

ext4 is not network aware FS.

cheers

On Tue, May 28, 2013 at 6:50 PM, Vasiliy I Ozerov <[email protected]> wrote:

Good day!

I have a little problem running drbd.

System: Debian Squeeze 6.0.6

Kernel: 2.6.32-5-amd64

DRBD: 8.3.13-2

Config for home resource:

resource home {

on backup {

device /dev/drbd1;

disk /dev/sda5;

address 78.47.3.54:7789;

meta-disk /dev/ram0[14];

}

on backup2 {

device /dev/drbd1;

disk /dev/sda4;

address 78.47.3.86:7789;

meta-disk internal;

}

}

ram0 - 2Gb Size

I make the following actions:

# drbdadm create-md home

# /etc/init.d/drbd start

Then I see the following:

root@backup2 /etc/drbd.d # cat /proc/drbd

version: 8.3.7 (api:88/proto:86-91)

srcversion: EE47D8BF18AC166BE219757

1: cs:Connected ro:Secondary/Secondary ds:Inconsistent/Inconsistent B r----

ns:0 nr:0 dw:0 dr:0 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:4293787648

Then I started sync:

root@backup /etc/drbd.d # drbdadm -- --overwrite-data-of-peer primary home

root@backup /etc/drbd.d # cat /proc/drbd

version: 8.3.7 (api:88/proto:86-91)

srcversion: EE47D8BF18AC166BE219757

1: cs:SyncSource ro:Primary/Secondary ds:UpToDate/Inconsistent B r----

ns:11232 nr:0 dw:0 dr:11436 al:0 bm:0 lo:0 pe:21 ua:0 ap:0 ep:1 wo:b oos:4293777088

[>....................] sync'ed: 0.1% (4193140/4193152)M

finish: 110:26:11 speed: 10,560 (10,560) K/sec

It's ok.

But when I try to mount /dev/drbd1 I see the following:

root@backup /etc/drbd.d # mount -t ext4 /dev/drbd1 /home/

mount: wrong fs type, bad option, bad superblock on /dev/drbd1,

missing codepage or helper program, or other error

In some cases useful info is found in syslog - try

dmesg | tail or so

And in dmesh I saw, that drbd started to sync only 4Tb:

[37354503.285925] block drbd1: Forced to consider local data as UpToDate!

[37354503.285972] block drbd1: Creating new current UUID

[37354509.351392] block drbd1: drbd_sync_handshake:

[37354509.351424] block drbd1: self ACD94469A7E81D3F:0000000000000004:0000000000000000:0000000000000000 bits:1073446912 flags:0

[37354509.351478] block drbd1: peer 0000000000000004:0000000000000000:0000000000000000:0000000000000000 bits:1073446912 flags:0

[37354509.351531] block drbd1: uuid_compare()=2 by rule 30

[37354509.351557] block drbd1: Becoming sync source due to disk states.

[37354509.351585] block drbd1: Writing the whole bitmap, full sync required after drbd_sync_handshake.

[37354509.401466] block drbd1: meta data flush failed with status -5, disabling md-flushes

[37354509.401501] block drbd1: 4095 GB (1073446912 bits) marked out-of-sync by on disk bit-map.

[37354509.401540] block drbd1: conn( Connected -> WFBitMapS )

[37354511.724636] block drbd1: conn( WFBitMapS -> SyncSource )

[37354511.724676] block drbd1: Began resync as SyncSource (will sync 4293787648 KB [1073446912 bits set]).

I tried to use flexible-meta-disk, but with no luck.

Can you help me to solve this problem?

Thank you!

--

Vasiliy I Ozerov

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--
Steve Kieu
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T	023 - 5422299

www.proactive.nl

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Re: [DRBD-user] drbd 35Tb disk with ext4

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