Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Hello, I'm currently trying to get a system up and running using DRBD. A lot of data has already accumulated on the system so I needed to use a truck based replication solution. I migrated all of the data on to a DRBD partition on NODE 1 and then used the following commands to copy the data onto a portable hard drive that would be used to ship the data to NODE 2: drbdadm disconnect ha drbdadm new-current-uuid --clear-bitmap ha dd if=/dev/sda1 of=/dev/sdb1 bs=4096 conv=noerror,sync (/dev/sda1 = the device of drbd partition, /dev/sdb1 = the portable hard drive partition device) drbdadm new-current-uuid ha drbdadm connect ha On NODE2 the following commands would then be run once the portable hard drive arrives there: dd if=/dev/sdb1 of=/dev/sda1 bs=4096 conv=noerror,sync (/dev/sda1 = the device of drbd partition, /dev/sdb1 = the portable hard drive partition device) drbdadm connect ha The issue occurs here where it begins syncing all of the data from NODE 1 to NODE 2. It should only be syncing the data since the first new-current-uuid. This happens inconsistently. Sometimes it will work as expected and sometimes it won't. Doing some diagnostics I was able to determine that the UUIDs that were copied onto the portable hard drive were UUIDs from before the first new-current-uuid. It appears the UUIDs didn't get properly flushed to disk before the dd command was run. I think I was able to get it to work consistently on my test system by bringing the resource down and back up again after the first new-current-uuid command and before the dd. I need to implement this on a production system and want more confidence that this will work so figuring out the root cause would be ideal. Any advice or help would be much appreciated. The hard drives on both NODE 1 and NODE 2 are currently running under RAID-6. DRBD Version: 8.4.7-1 Thanks. -- Justin Patriquin | Software Developer Pantel International | 125 Joseph Zatzman Drive | Dartmouth, Nova Scotia | B3B 1W1 Phone: (902) 468-5998 pantelintl.com Please consider the environment before printing this e-mail The information contained in this e-mail message, together with any attachments thereto, are intended only for the personal and confidential use of the addressee(s) named above. The message and the attachments are or may be a privileged or protected communication. If you are not the intended recipient of this message, or authorized to receive it for the intended recipient, you have received this message in error. If you received this message in error, you are not to review, use, disseminate, distribute or copy it or any attachments and are requested to immediately notify us by return e-mail message, and delete the original message.