So I recently got a Drobo (4-bay, 2nd gen). Very exciting.\n\nThe thing with a Drobo is that unless you tell it otherwise, the soup\nof drives in there becomes on huge virtual drive which expands if you\nreplace drives with bigger ones. This leads to a couple of issues I'm\ntrying to figure out best how to handle.\n\n1. The Drobo software allows you do set up partitions and it will put\nas many on there as it can (ie. if you have, after RAID,etc, say 3.6TB\nof usable space and you specify 2TB partitions, you'll get 1x2TB and\n1x1.6. What happens if you add enough drives that you now have, say,\n4.6TB of usable space - do you end up with your original 2TB + a 2.6TB\nor does it recognize that the additional space gets over the max\npartition size you specified and you end up with a 2x2TB (and what -\nunused space or an additional 0.6TB partition?)\n\n2. If you want partitions of different sizes, I read somewhere that the\nway to do that is Disk Utility rather than the Drobo partitioning\nsoftware. I actually was wanting 1x1TB + 1x2TB + whatever's left over.\nSo I told the Drobo software to make only one partition and used Disk\nUtility to set up the 1x1TB partition and the rest became "Drobo 2"\nbecause at the time, I didn't have enough drives in there to set up\nthree partitions. Now I've added disks and the 2nd partition, which is\nnow way bigger than 2TB should get split, but Disk Utility fails to\nrepartition that 2nd partition. Is this, in fact, the right way to do\nthis? Should I do this at all?\n\n(For folks wondering, the reason I want fixed-size partitions is\nbecause there are certain utilities which will just use all available\nspace on a given drive or partition - such as Time Machine and possibly\nCrashPlan - and I don't want them eating the entire drive.)\n\n3. One of the partitions has to be "rest of the drive" partition where\nnew free space goes if I add bigger drives. Is there any way to get\nthe Finder to show me the actual amount of space free there? As far as\nI can tell, no, there isn't. This is rather disconcerting.\n\nI am certainly going keep CrashPlan backups on there (from the machine\nit's attached to, plus a couple of others which send them over via\nnetwork). I may not keep Time Machine on it, though I was looking\nforward to having Time Machine on a local drive rather than connected\nto the Airport Extreme - doing it over the network does noticeably slow\ndown the machine. If I could do Time Machine to the Drobo from the\nmachine it's attached to and also have Time Machine on the other\nmachines in the house use the desktop as a target, that'd be great.\nNot sure how to do that. It's pretty important for the notebook\nmachines to do Time Machine over the network one way or another, so\nit'll either be to the desktop, or to another HD that I'll go and hang\noff the Airport Extreme -\- in which case I won't bother putting the\nT.M. volume on the Drobo at all.\n\nAnyway, thanks for any input.