<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN" "http://www.w3.org/TR/REC-html40/strict.dtd"><html><head><meta name="qrichtext" content="1" /><style type="text/css">p, li { white-space: pre-wrap; }</style></head><body style=" font-family:'Sans Serif'; font-size:10pt; font-weight:400; font-style:normal;"><br />I've set up a trial RAID 1+0 using Tim's layout as below, and it's all fine. I have one last question.<br /><br>
<br /><br>
Tim, using your setup, if I am running RAID 1+0 then will it be possible to add another disk later on without having to back all the data up first? (I'd try it, but don't have a spare disk to hand). Could I add in drive D as per your example, and then automatically grow the RAID 0 across the top? I have not been able to find a definitive answer on this on the net.<br /><br>
<br /><br>
Same goes for RAID10,F2 - if I go this route can I just automatically grow the system with an extra disk later on?<br /><br>
<br /><br>
Thanks for your help.<br /><br>
<br /><br>
> > Say you get a new 500GB drive, 'D'. If you're willing to stick to 250GB<br />> > arrays (rather than reconfiguring to 500GB arrays) you can add the new<br />> > drive while ensuring that you always have two copies of everything.<br />> > Partition the new drive into two 250GB partitions. Then add partition D2<br />> > to array 3 (so array 3 has 3 copies of the data). Once the array has<br />> > sync'd you have: Array 3: C1 A2 D2<br />> ><br />> > Now remove partition A2 from array 3. Finally set up a new array using D1<br />> > and A2. So you end up with:<br />> > Array 1: A1 B2<br />> > Array 2: B1 C2<br />> > Array 3: C1 D2<br />> > Array 4: D1 A2 (empty)<br />> ><br />> > If you're not worried about maintaining two copies of everything during<br />> > the process you can do this: create a new array out of the new drive D.<br />> > Set it up with a missing copy. Remove C from arrays 2 and 3. Set up<br />> > another array with drive C and a missing copy. At this point you have:<br />> > Array 1: A1 B2<br />> > Array 2: B1 -<br />> > Array 3: - A2<br />> > Array 4: D - (500GB)<br />> > Array 5: C - (500GB)<br />> > Copy everything from arrays 1, 2, and 3 to arrays 4 and 5 however you<br />> > like. Then delete arrays 1, 2, and 3 and add drives A and B to arrays 4<br />> > and 5. Once they sync you'll have:<br />> > Array 4: D A<br />> > Array 5: C B<br />> ><br />> > Expanding a (mdraid) RAID10 is not so easy but I recommend it if you're<br />> > not likely to expand often as the performance can be much better. You can<br />> > set it up so that a single filesystem is striped across the 3 or 4 drives<br />> > without needing LVM on top.<br />> ><br />> > Cheers,<br />> > Steve<br />> ><br />> ><br />> > _______________________________________________<br />> > mythtvnz mailing list<br />> > mythtvnz@lists.linuxnut.co.nz<br />> > http://lists.ourshack.com/mailman/listinfo/mythtvnz<br />> > Archives http://www.gossamer-threads.com/lists/mythtv/mythtvnz/<br /><br>
<br /></p></body></html>