Thanks for your quick response. It won't matter if I want to use 2 blank partitions to build RAID1; But now I wish to use mdadm to backup my /home partition, which already has tons of files on it; If mdadm happens to choose the other blank partition as source to do mirroring, all my data on /home will be lost; Hardware RAID always allows me to choose which partition/drive to be used as source. Regards, On Mon, 2005-09-12 at 08:21 +1000, Neil Brown wrote: > On Sunday September 11, xucs007@xxxxxxxxx wrote: > > Dear Neil Brown, > > > > I'm trying to learn how to use your great mdadm, > > one thing I'm not quite sure, and couldn't find > > any clue in your man page, is, > > > > During create or assemble mode, for RAID1, which > > device mdadm uses as source to make the mirroring? > > Is there any differences to determine it > > for situations of same-size devices and different-size > > devices (>1% differences) ? > > I think it copies from the smallest numbered working drive (i.e. drive > 0 if that is working, else drive 1, etc). However it really > shouldn't matter to you. If you are doing something that depends on > having the right answer to this, you are probably doing it the wrong > way. > > If you would like to discuss it further, I suggest explaining what you > want to do, and why you think you need to know this, to > linux-raid@xxxxxxxxxxxxxxxx > > NeilBrown > -- Changsen Xu - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
