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 < [email protected]> 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 <[email protected]> > 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: [email protected] and your owner is Cara > Quinn - you can reach Cara at [email protected] > > The archives for this list can be searched at: > http://www.mail-archive.com/[email protected]/ > --- > 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 [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/macvisionaries. > For more options, visit https://groups.google.com/d/optout. > -- 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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