> On Jul 20, 2017, at 3:12 PM, Michael <[email protected]> wrote: > > > On 2017-07-20, at 12:51 PM, Andy Ringsmuth <[email protected]> wrote: > >>> >>> On Jul 20, 2017, at 12:31 PM, 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? >> >> Michael, >> >> Never, never, ever, use Time Machine on a partitioned disk. It defeats the >> whole purpose of having a backup. If Time Machine is backing up other items >> on that same physical disk, your backup is basically worthless. If the disk >> dies, you lose your original data and the backup. >> >> Disks are cheap. You can get 4TB for around a hundred bucks. Get one >> dedicated disk for Time Machine and for absolutely positively nothing else. >> >> Then, go from there on the rest of your partitions. > > Ok, so I have a machine with two USB ports. One has a hub. One has my backup > drive. One has my DVD drive. > > So I'm already having to swap things around -- if I plug in the DVD drive > (Apple's official drive, won't work in a hub, has to be connected directly), > I have to move the external to the hub -- which means any terminal window on > there, or anything using stuff on there, gets clobbered. > > Another drive? How do I hook it up? I'm already filling the hub, and having > to plug/unplug things as I go. > > The primary purpose of the time machine drive is to hold a backup copy of > what's on the internal SSD inside the laptop. The secondary purpose is to > have space for additional stuff. The drive is pretty much only videos -- > either older videos that I'm finished with, or low-priority footage that I'll > probably discard instead of using, or archival copies of stuff uploaded to > youtube; or videos to watch that I've downloaded off the internet. > > If my internal drive fails, I have a time machine. > If my external drive fails, it's painful, but I have an internet backup > (backblaze) that I can restore from, and nothing on that drive is time > critical.
Get a bigger hub. :-) Is 28 ports enough? https://www.amazon.com/Manhattan-Port-USB-Hub-161718/dp/B0074024XU OK, so that one gets sucky review, but still, you can always get a hub with more ports on it. -Andy _______________________________________________ MacOSX-talk mailing list [email protected] http://www.omnigroup.com/mailman/listinfo/macosx-talk
