Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Le 31/01/2013 18:27, Adam Goryachev a écrit : > 1) Stop DRBD on secondary > 2) Pull all drives on secondary > 3) Add all drives on secondary and build new RAID6 array > 4) Enable DRBD on secondary > 5) sync from primary to secondary I second that. Rebuilding 16 disks RAID6 is very long. > Danger of read errors on the primary during this sync Before you start, "drbdadm verify all" will make sure both nodes can actually read their disks. Bonus: the resync will make sure the RAID can actually write to the disks (no bad surprise). > (...)Finally, I think you have a fairly high risk with 16 drives in a single > RAID6 No way. With DRBD it's like RAID6+1 and you still should have backups. Losing 3 disks on both nodes at the same time means fire, lots of bad luck, or evil people being bad. When it eventually happens, a downtime is probably OK - rebuild from scratch and restore backups. By the way, moving one node to a building across the street protects from fire. Lionel Sausin.