On Sun, 27 Nov 2011 03:28:31 +0700 Ronal Andadinata <randadinata@xxxxxxxxx> wrote: > Hi, > > I'm wondering, in the case of raid1 array with internal bitmap, it goes > like this : > 1. Machine A has 1 raid1 array with Disk1 dan Disk2 > 2. Dettach Disk2 from Machine A, put it on Machine B > 3. Machine A runs normally, Machine B runs on normally on different place. > 4. Detach Disk2 from Machine B, put it back on Machine A, re-add Disk2 > to md1 > > If this were raid1 without bitmap, Disk2 will be overwritten from > scratch with contents of Disk1, what happen if the array has bitmap ? > Would there be partial sync ? Would the two disk be identical with only > using partial sync ? It might fail to re-add, or it might do a partial resync and probably leave the two devices different so corruption would likely appear. Just don't do this. If you want to use disk2 on a different machine, assemble it with --update=uuid the first time so it gets a different uuid and can never become confused with the old array. NeilBrown
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