Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On Thursday 15 April 2010 16:00:26 Jiri Vitek wrote: > actualy i have drbd configured as: > master/slave > meta-disk: internal > backd blockevice is sw raid.. /dev/md0 > > Now everything is working fine, but due to performance issue i need to > migrate form sw raid6 level to raid5.. > > I have no problem with sw raid online resize. But when resize operation > will finished, then backing device's size will grow up +250GB > > There is no chance to resize both nodes simultaneously with finish in > the same time.. > > How will drbd handle this situation? when one backing device will be > bigger then second one. drbd should handle different disk sizes just fine. Just follow the instructuions in the user's guide for online resize. Do _not_ take a node offline between RAID resize and drbd resize, as DRBD cannot find it's meta data anymore in that case. You should also really, really consider putting your meta data on a RAID 1. You'll only need a couple of megabytes, so even if you used all available space on your disks for the RAID 6, there should be some /boot volume which you can shrink a little. Putting your meta data on a RAID 1 instead of RAID 5 or 6 alone should give you a nice performance boost. Maybe you could even continue using RAID 6. Regards, Stefan SEifert