[DRBD-user] 4TB limit

[Mikael Andersson]

I do still have issues getting /dev/drbd1 device to come over 4TB limit (4293787648 byte)
Now I think I have tested just about everything I can come up with, I found something I don't understand.

When I configure "meta-disk internal" then I get what I want in size, about 9TB.
But when I set "meta-disk /dev/sdb1[1]" I get the 4T limit.

Then I tested 1GB as md size, thinking more than enough, no difference.
I also calculated the size using http://www.drbd.org/users-guide/ch-internals.html#s-external-meta-data , but with no luck.
I made sure I didn't calculated wrong by forcing a colleague calculate the same thing.

Anyone have had same issues or is it just me? My system perhaps trying to force me to use internal metadata although I don't want to..?

I use (still) Ubuntu 10.04.2 LTS (64bit)
Apt-get installed drbd8-utils drbd8-source
drbd8-source        2:8.3.7-1ubuntu2.1  
drbd8-utils         2:8.3.7-1ubuntu2.1 

config:
resource nfs1 {

        protocol C;

        handlers {
                pri-on-incon-degr "echo o > /proc/sysrq-trigger ; halt -f";
                pri-lost-after-sb "echo o > /proc/sysrq-trigger ; halt -f";
                local-io-error "echo o > /proc/sysrq-trigger ; halt -f";
                outdate-peer "/usr/lib/heartbeat/drbd-peer-outdater -t 5";
        }

        startup {
                degr-wfc-timeout 120;
        }

        disk {
                on-io-error detach;
        }

        net {
                cram-hmac-alg sha1;
                shared-secret "password";
                after-sb-0pri disconnect;
                after-sb-1pri disconnect;
                after-sb-2pri disconnect;
                rr-conflict disconnect;
        }

        syncer {
                rate 100M;
                verify-alg sha1;
                al-extents 257;
        }

        on rix-san05-primary {
                device  /dev/drbd1;
                disk    /dev/sdb2;
                address 192.168.100.5:7788;
                meta-disk /dev/sdb1[1];
        }

        on rix-san05-secondary {
                device  /dev/drbd1;
                disk    /dev/sdb2;
                address 192.168.100.6:7788;
                meta-disk /dev/sdb1[1];
        }
}

Regards
Mikael Andersson