His point is that it's relatively straightforward using Apple tools to modify the size of the last partition on a drive, but modifying the size of any of the partitions except the last is a complete pain in the butt.
I haven't played with these tools very much, but there are a number of webpages out there that illuminate the usage of some of the tools of Core Storage with respect to the process of creating a roll-your-own Fusion Drive. I did do this once, and was successful, but my recollection (and I may be wrong) is that the process did require you to destroy the existing volume in order to add to it, which is not what you want. Another approach is to use the partition resizing tools found in Drive Genius. They take a while to run, but I have found them to be very reliable. They can alter the size of any of the partitions on the drive, not just the last, and they can also "slide" partitions back-and-forth on the drive to eliminate wasteful inter-partition unused regions. > On Jul 20, 2017, at 11:29 AM, Thomas Baley <[email protected]> wrote: > > I haven't seen "core" storage for decades. 🙄 > > What does it matter, which partition is where, physically, on the drive? Are > you thinking it is faster to have one arrangement versus another? It is not. > > > > Sent from my iPhone > Thomas Baley > [email protected] > (404) 307-6428 > www.linkedin.com/in/tbaley > >> On Jul 20, 2017, at 13:31, Michael <[email protected]> wrote: >> >> So one of my partitions filled up too soon :-). It's on a 4 TB drive, and I >> figured I'd shrink the time machine backup on the same disk to make more >> room. >> >> Except that I found that the partition layout put the time machine partition >> at the front of the drive, and the data partition at the end of the drive. >> >> So my first thought was to look at core storage and logical volumes. The >> thinking was to turn the existing data partition into a logical volume, and >> then add a second logical volume to it -- resizing the data without having >> to copy it. >> >> I can't find anything in diskutil's man page to describe how to add a new >> physical volume to a logical volume. >> >> A "workable" (but slow) solution is to just delete the TM (3 tb), put a copy >> of the data at the front of the drive, and make a new smaller TM at the end. >> That would work, but copying a full TB of data on the same spindle is slow. >> (Not a big deal, just an annoyance). >> >> My question is: What can be done with core storage? How can you add new >> physical volumes to existing partitions? >> >> Perhaps more usefully / generally: Lets say you had a large, 4 TB drive that >> you knew you were going to have different data stored on. You break it up >> into 8 1/2 TB partitions. You want to be able to expand two different >> logical volumes/partitions as needed, not knowing ahead of time which one >> would need how much of the space. >> >> How would something like this be done with core storage, or is this not what >> core storage is intended for? >> >> (10.9.5, in case that matters). >> >> --- >> Entertaining minecraft videos >> http://YouTube.com/keybounce >> >> _______________________________________________ >> MacOSX-talk mailing list >> [email protected] >> http://www.omnigroup.com/mailman/listinfo/macosx-talk > _______________________________________________ > MacOSX-talk mailing list > [email protected] > http://www.omnigroup.com/mailman/listinfo/macosx-talk _______________________________________________ MacOSX-talk mailing list [email protected] http://www.omnigroup.com/mailman/listinfo/macosx-talk
