Hi, Further to what Chris has mentioned here, the recommended Time Machine size is at least twice the size of your original drive. So, for a 250 GB drive, you should have a 500 GB Time Machine drive or partition. This is recommended, so it's possible to play with these numbers slightly. If you normally only use around 100 GB of that built-in drive, then you can probably get away with around a 300 GB TM drive. Consider though what Chris explained, a 10 to 20 GB change in data will increment itself fairly quickly and you may run out quicker than you'd expect. A change from 10.11 to 10.12 often is at least a 10 GB change to a backup.
Later... Tim Kilburn Fort McMurray, AB Canada On May 18, 2017, at 07:46, 'Chris Blouch' via MacVisionaries <macvisionaries@googlegroups.com> wrote: Don't forget that some of the value in Time Machine backups is to be able to keep incremental backups over time. So if you have 200GB of stuff on your drive and your backup drive is 350GB, that will be good for your first backup and then Time Machine will continue to make hourly incremental backups of anything that has changed. Depending on what you are doing that can turn into a few GB per day. So how much you change and how much space is left after the initial big backup determines how far back in time you can go to retrieve stuff. If, as in my example, I take some of that 150GB of free space and use it up for other stuff then I decrease what Time Machine has to work with. CB On 5/18/17 6:03 AM, Ramy Moustafa wrote: > Hi Jonathan: > > I think that I will back up on the same Hd and he same Partetion, > because my Hd is 400 GB, and my 2 hd for my mac mini and my MacBook > pro are only 350 GB, so I think shoud be ok, and most o them are > empty. > but just need to be sure that no interfere will be happened. > but my stratigy will be is to connect my External hd to my mac mini > and start the Tm, then connect my MacBook pro to my External Hd and > start the tm, is it ok, or do I miss something? > > > On 5/18/17, Ramy Moustafa <ramy.moustaf...@gmail.com> wrote: >> Hello Chris; >> >> Thanks a lot, Didn't you try to use the windows restore? will it work on >> Vm? >> >> >> On 5/18/17, Ramy Moustafa <ramy.moustaf...@gmail.com> wrote: >>> Hi ET: >>> >>> THanks so much for the Carbon Copy Cloner advice, but, can I use it on >>> the same TIme machine Hd or seprat one? >>> don't worry about the size because, my Mac Hd is only 256 GB and I >>> don't store any files except my system and very very small files for >>> immediate work >>> so, do you trust the Carbon Copy Cloner? and will it do the trick >>> without losing data? >>> >>> >>> >>> On 5/15/17, 'Chris Blouch' via MacVisionaries >>> <macvisionaries@googlegroups.com> wrote: >>>> When I do time machine backups to a network drive I create a sparse >>>> image on that drive so I can set the max size it will occupy, mount that >>>> image and share the mounted image as my time machine backup drive for >>>> another computer. I have this setup to store a couple TM backups to a >>>> Mac Mini that has a single large drive for archives. >>>> >>>> CB >>>> >>>> On 5/15/17 12:39 PM, Jonathan Cohn wrote: >>>>> I have three systems with TimeMachine backups on one HD without using >>>>> a separate partition for each. One issue you might run into though is >>>>> I don't believe the automatic deletion of old backups works correctly >>>>> in this configuration. So as long as you have space on the drive you >>>>> should be OK. But when the partition starts to get tight you will need >>>>> to do manual deletions of the older backups as described last week on >>>>> this mailing list. If you want, you can even turn on Apple File >>>>> Sharing and mount the drive from one computer to another and then tell >>>>> Time Machine to backup to the Network partition. I haven't tried this >>>>> in the last two OS's but I believe it still works. >>>>> >>>>> When you do the Network route, for some reason, the Macintosh creates >>>>> a disk image and saves your files to the disk image. I don't believe >>>>> this is of any concern, and I think the primary reason is to maintain >>>>> User Information and separate encryption availability for each >>>>> computer. . >>>>> >>>>> >>>>> On Mon, May 15, 2017 at 9:54 AM 'Chris Blouch' via MacVisionaries >>>>> <macvisionaries@googlegroups.com >>>>> <mailto:macvisionaries@googlegroups.com>> wrote: >>>>> >>>>> With the partitions your single external hard drive should appear >>>>> on >>>>> your desktop as two drives. You'll have to decide how much space >>>>> to give >>>>> each partition. For example, if you have a 1TB drive you might >>>>> break it >>>>> up into two 500GB partitions. The main issue is that TM does >>>>> incremental >>>>> backups until whatever drive you give it is full. At that point it >>>>> prunes the oldest stuff to make room for newer stuff. In that way, >>>>> how >>>>> far back in time you can go depends on how big the drive is >>>>> relative to >>>>> how much stuff you need to back up. If you did back up both >>>>> machines to >>>>> a single large partition it probably would work for a while but >>>>> eventually one backup would start getting starved for space as the >>>>> other >>>>> used up space. Basically you would have two greedy processes not >>>>> sharing >>>>> well together on the same drive. I have seen tricks where you use >>>>> disk >>>>> utility to create a sparse image on the drive, mount that sparse >>>>> image >>>>> and backup to that. The sparse image can has a cap set on how large >>>>> it >>>>> can get so it would act like a partition, but at that point it >>>>> might be >>>>> just as easy to make an actual partition. >>>>> >>>>> CB >>>>> >>>>> On 5/15/17 7:06 AM, Ramy Moustafa wrote: >>>>> > Thanks so much , but is there anything that i must folloq when >>>>> partitioning? >>>>> > >>>>> > Ramy moustafa saber >>>>> > licturer at: >>>>> > faculty of musical education >>>>> > music arranger and sound engineer >>>>> > Sent from my iPhone >>>>> > >>>>> >> On May 15, 2017, at 9:18 AM, Daniel Chavez >>>>> <topdog2...@gmail.com <mailto:topdog2...@gmail.com>> wrote: >>>>> >> >>>>> >> The only way you'd be able to use the same HD, as far as I'm >>>>> aware, is create a separate partition. Then, name the partition's >>>>> accordingly. Mac Mini as 1 partition, and MacBookPro as the other >>>>> partition, as examples. >>>>> >> >>>>> >> -- >>>>> >> The following information is important for all members of the >>>>> Mac Visionaries list. >>>>> >> >>>>> >> If you have any questions or concerns about the running of this >>>>> list, or if you feel that a member's post is inappropriate, please >>>>> contact the owners or moderators directly rather than posting on >>>>> the list itself. >>>>> >> >>>>> >> Your Mac Visionaries list moderator is Mark Taylor. 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You can reach mark >>>> at: >>>> macvisionaries+modera...@googlegroups.com and your owner is Cara Quinn - >>>> you >>>> can reach Cara at caraqu...@caraquinn.com >>>> >>>> The archives for this list can be searched at: >>>> http://www.mail-archive.com/macvisionaries@googlegroups.com/ >>>> --- >>>> You received this message because you are subscribed to the Google >>>> Groups >>>> "MacVisionaries" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an >>>> email to macvisionaries+unsubscr...@googlegroups.com. >>>> To post to this group, send email to macvisionaries@googlegroups.com. >>>> Visit this group at https://groups.google.com/group/macvisionaries. >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>> >>> -- >>> Ramy MoustafaSaber >>> Music instructor @: >>> Faculty ofmusical education >>> Music arranger and Sound engineer @: >>> Harmony Recording Studio >>> https://www.facebook.com/HarmonyRecordingStudio.eg >>> >> >> -- >> Ramy MoustafaSaber >> Music instructor @: >> Faculty ofmusical education >> Music arranger and Sound engineer @: >> Harmony Recording Studio >> https://www.facebook.com/HarmonyRecordingStudio.eg >> > -- ¯\_(ツ)_/¯ -- The following information is important for all members of the Mac Visionaries list. 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