Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
>>>>> "Allen" == Allen Chen <achen at harbourfrontcentre.com> writes: Allen> Here is my explanation to use DRBD instead of md raid1: for Allen> md raid1, if one member is physically removed from the Allen> machine, and after you reconnect the same disk to md raid1, Allen> MD will re-sync everything to it. Wrong, see below. Allen> It takes much more time. for DRBD, if the second disk is Allen> removed from the machine, and after you reconnect the same Allen> disk to DRBD, DRBD will sync whatever has been changed. It Allen> take less time than MD raid1. md raid1 can do the same thing and is definitely the better tool for this job. See e.g. https://raid.wiki.kernel.org/index.php/Write-intent_bitmap Roland ------- http://www.q-leap.com / http://qlustar.com --- HPC / Storage / Cloud Linux Cluster OS ---