> > > You have two drives in RAID10 currently, and you want to go > > > to four. > > > Are you meaning to increase the capacity as well or do you > > > just want the > > > two remote drives to be a mirror of your current two > > > drives? > > > > Both more capacity, and remote storage. > > > Okay, so you want the local drives to be (effectively) a RAID-0, and > then mirrored to the remote drives? > > > > > > > Needless to say I'd like performance to be good, but > > > that's starting > > > > to look hopeless. > > > > > > > I'd recommend getting two smaller drives, and having two > > > separate > > > mirrored pairs - the smaller array for the OS and database > > > and the > > > larger one for recording. Keep one of each size > > > within the HTPC and one > > > of each in the garage. You can also use the > > > write-mostly option to make > > > the kernel read from the local drives where possible. > > > > But what I'm saying there doesn't seem to be a way in mdadm to specify > > --one side-- of the mirror here, and the other side, there. > > > I've no idea what you mean here. You specify two block devices for the > mirror - what difference does it make where (or what) they are? And if Well, he doesn't want to wind up with both a primary copy and a mirror copy of any of the drive elements in one physical location. > you want RAID10 then (in the create order) drives 0 and 2 are local and > 1 and 3 remote. In his situation (assuming he doesn't take my advice and separate the remote system entirely), wouldn't he be better served to create a RAIDn array on both systems and then create a RAID1 from the local and NAS array with the write mostly option? -- 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
