[DRBD-user] DRBD installation problems

Patrick Jaromin Patrick at JGSullivan.com
Tue Mar 1 15:51:10 CET 2005


> -----Original Message-----
> From: drbd-user-bounces at linbit.com [mailto:drbd-user-bounces at linbit.com]
> On Behalf Of Alex Vrenios
> Sent: Monday, February 28, 2005 5:17 PM
> To: drbd-user at linbit.com
> Subject: RE: [DRBD-user] DRBD installation problems
> 
> Hi,
> 
> I just posted an answer to the same question, because I had the same
> problem
> and solved it. (At least I think I did!)
> 
> First, I have 0.7.10 on a Redhat 9 pair and I dedicated two 4G drives to
> DBRD, one added to each PC at /dev/hdd. I made two partitions on each: 3G
> and 1G defined as /dev/hdd1 and /dev/hdd2, respectively. Then I issued:
> 
> root# drbdsetup /dev/drbd0 disk /dev/hdd1 /dev/hdd2 1
> 
> where /dev/hdd1 is my "resource file" that I want DRBD to mirror, dev/hdd2
> is the "meta data" file that DRBD uses to track mirroring, and 1 (the
> number
> one) is the index number that seems to work. (Someone here recommended
> using
> -1,but that was an invalid choice according to the drbdsetup command. 1
> works, but 2 doesn't - I have no idea what this means.)


If you choose to use the "internal" metadata device, the correct index 
is -1. 

> 
> More (not all) info on meta data file sizes and use can be found in the
> man
> page for drbdsetup: "man drbdsetup" works on my PC under RH9.
> 
> Finally, after the drbdsetup command above, I issue:
> 
>    root# mkfs -b 3072 /dev/drbd0
> 
>    root# cd /; mkdir /data
> 
>    root# mount /dev/drbd0 /data
> 
>    root# chmod 777 /data
> 
> After these commands, I add "/etc/init.d/drbd   start" to my rc.local
> 

I would suggest not putting the startup in the rc.local file. This would
require you to add any future services that rely on drbd to the rc.local
file as well. 

I've set mine up S11 in all run levels (just after networking on CentOS 2.1.



> >From then on, my application user id can access and write data to the
> /data
> area on the primary machine, and it is mirrored to my backup PC.
> 
> DISCLAIMER: I am still trying to figure out DRBD, especially the .conf
> file
> entries, so I am by no means an expert. The above worked for me...
> 
> Alex
> 
> -----Original Message-----
> From: drbd-user-bounces at lists.linbit.com
> [mailto:drbd-user-bounces at lists.linbit.com] On Behalf Of Luis Eduardo
> Vivero
> Peña
> Sent: Monday, February 28, 2005 11:28 AM
> To: drbd-user at lists.linbit.com
> Subject: [DRBD-user] DRBD installation problems
> 
> 
> Hi guys,
> 
> 
> I'm traying to configure DRBD under Debian GNu/Linux 3.1 (what difficult
> letters combination to remember... :) ) and I have readed the
> documentation.
> 
> I have compiled (drbd-0.7 from official sources) and charged the drbd
> module
> (modprobe drbd) without problems (but the documentation is a little
> wrong).
> This specify that I must to configure the device with the following
> command:
> 
> drbdsetup /dev/nb0 disk /dev/hda4
> 
> and it's answer me:
> 
> disk lower_dev meta_data_dev meta_data_index [{--size|-d} val]
>          [{--on-io-error|-e} val]
> Not enough arguments.
> 
> The message is clear, but I don't know what is the parameters 'lower_dev',
> 'meta_data_dev' and 'meta_data_index'.
> 
> 
> I was looking for in google but I cannot find the solution.
> Can you gave me a light please?
> 
> 
> 
> --
> Luis Eduardo Vivero Peña
> Corporación Linux S.A.
> www.corplinux.cl
> 
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