Just bought a 3TB Firewire Drive for Time Machine, a Question About Mixing Files or Paritioning

I have two internal HDs, one 1.5TB spinning drive and a 60GB SSD for the OS and apps. Externally I have 2-1TB FW drives that I use for media files & other data. I would like to use the 3TB as my failsafe TM backup, but I wonder if 2TB is enough in the short term? I know TM backups get big, but I'm hoping by just backing up the internals and using Crashplan for all I could quickly recover from a HD disaster locally.
Here's my question, is there any downside to mixing Time Machine backups and "regular" files (docs, media, emails) on the same Time Machine drive or would I be better served partitioning this drive 2/1? Is there any advantage to partitioning to keep TM on its own parition?
And do you think that 2TB is sufficient for say the next 6-months to 1-year to hold 1.56TB of data?
Thanks!
JoeL
Atlanta, GA

There's no way to predict how long it will take to fill up a TM volume. That depends on your usage pattern. If you have large files that change often, it will fill up a lot faster than it will if you have only small files that change often.
The surest way to fill up a TM volume quickly is to back up the virtual disk files created by virtualization software such as VMware. Those files should be excluded from TM backup, and their contents should be backed up from within the guest OS, using tools native to that OS.
When the volume does fill up, snapshots will be deleted to make room for new ones, oldest first. Files still on the source volumes will never be deleted.
People on this site often give the advice that the size of the TM volume should be at least some particular multiple of the size of the source volumes, such as 2 or 3. I don't know what evidence that advice is based on, if any. It seems completely arbitrary to me.

Similar Messages

I have just upgraded from a Macbook to a Macbook Air. I have been using a iomega external hard drive for Time Machine, which use a Firewire. However, Macbook Air's do not have a Firewire port and i cannot find an adaptor anywhere. Can anyone help?? Thanks

I have just upgraded from a Macbook to a Macbook Air. I have been using a iomega external hard drive for Time Machine, which use a Firewire. However, Macbook Air's do not have a Firewire port and i cannot find an adaptor anywhere. Can anyone help?? Thanks

There has never been a reliable firewire ---> USB adapter suitable for external high speed storage. This was a major issue when the MacBooks lost the firewire port a number of years ago (Apple subsequently brought it back).
The only high speed port on the Air is the ThunderBolt port. There are external ThunderBolt drive options out there, but they're somewhat more expensive than traditional USB/FireWire options.

Need advice on new hard drive for Time Machine, and have Firewire questions

I have an Intel iMac 2.66GHz with 500GB internal drive. I am going to buy an OWC 1TB drive to use for Time Machine.
I also have an older 160GB external drive with Firewire 400. I'd like to continue using it for extra storage, and would like both the iMac's internal drive and the 160GB external drive to be backed up to the new drive.
OWC's 1TB drive is available with Firewire 400 & USB 2. For an additional $30, it will also have Firewire 800. If I get the Firewire 800 drive and daisy-chain the iMac > new 1TB drive > old 160GB drive, will the iMac to 1TB drive run at 800, or will the 160GB drive's limitation of Firewire 400 pull the speed of the whole connection down to 400? (If the latter is true, then it would be a waste of money to get Firewire 800.)
Also, will it make much difference whether I use Firewire 800 or 400 for a drive dedicated to Time Machine?
Finally, the 1TB drive with a 32MB cache costs $20 more than one with a 16MB cache. Is a 32MB cache worth the extra expense for using with Time Machine?
Thanks!
Message was edited by: Patrick Houlihan

Patrick Houlihan wrote:
If I get the Firewire 800 drive and daisy-chain the iMac > new 1TB drive > old 160GB drive, will the iMac to 1TB drive run at 800, or will the 160GB drive's limitation of Firewire 400 pull the speed of the whole connection down to 400? (If the latter is true, then it would be a waste of money to get Firewire 800.)
I believe it will operate the entire bus at the slowest speed, but can't say for sure.
Finally, the 1TB drive with a 32MB cache costs $20 more than one with a 16MB cache. Is a 32MB cache worth the extra expense for using with Time Machine?
I went with the cheaper, smaller cache OWC drives for my backups on the theory that if caches speed repeated access of the same data, and a backup is always a single-pass stream of non-repeating data, then with a backup the data that goes in the cache doesn't need to be fetched again and therefore the cache isn't much help for backups. I'd love to hear if that's true.
I didn't answer the one about FireWire 800 for Time Machine because my Time Machine backups are over the network to Time Capsule. However, having a faster Time Machine drive interface should be faster. FireWire 800 certainly speeds things up for non-Time Machine backup software like SuperDuper which I also use.

Can not fine external hard drive for time machine sence lion was installed

I can not fine external hard drive for time machine sence lion was installed, it don't reconise it at all.

I have a Mac Mini (late 2009) and I have an iomega 1TB external hard drive connected to my mini via firewire and usb (usb allows me to use the usb ports on the external 1TB drive to daisy chain other devices). Since I installed Lion, my Time Machine and this 1TB drive (and its partitions) is finicky. Sometimes it is mounted and sometimes it is not. This issue has only surfaced post Snow Leopard and in the Lion era. I am not the first to say this but the whole reason I went Mac was b/c of Vista. I am beginning to think that Lion is the new Vista. Sorry for the latter, just venting... b/c this ain't the first issue with Lion.

Hard Drive for Time Machine for iMac with AirPort Extreme??

I just switched back to Mac after too many years with a PC. I bought an iMac 24" 2.8GHz with 4GB 667MHz DDR2 SDRAM and 750GB Serial ATA Drive.
I'm planning on adding an external hard drive for Time Machine to attach to my AirPort Extreme. From reading information posted on the Apple site and my AEBS I understand that it needs to be connected to the USB port on the AirPort Extreme.
While I may be opening up a technological "can of worms," I'd like to know what will be the most dependable drive 1TB, USB 2.0 that I can buy. Noise and bright lights are not a consideration here. I just want a drive that I can depend on to work with Time Machine. The "original" data will be stored elsewhere. I've heard of, read about and experienced so many hard drive failures that I'm getting "gun shy" about this subject. Please feel free to let me know what's good and bad. Thanks.

Here is a quote right from Apple's site today:
Quote:
AirPort Extreme lets you turn your external USB hard drive into a drive you can share with all the >users on your network. It’s called AirPort Disk, and it’s a simple and convenient way to share files >among everyone in your family, office, or class.
I tried to return my AEBS to Apple but I was a few days beyond their 14 day limit on returns (limit is bases on shipping date of the item in question, not when all parts of the shipment are received). Part of my reasoning with the Apple Store CS was the posts like yours saying that this couldn't be done. The Apple Store rep. and the tech. rep. that he claims that he spoke to said it could be done. The only way I could return the AEBS, according to the Apple Store CS rep., and get a new Time Capsule would be if I bought a hard drive and discovered that my AEBS would not work with the hard drive. No, I'm not a happy new customer. So, I want to buy a good, reliable hard drive and want to know which one to get.

Adding a Dedicated External Drive for Time Machine

Hello,
I want to use a dedicated external drive for Time Machine backup and another drive for a SuperDuper backup. Before even adding another drive, I'm already pulling and replacing usb connections from the back of my computer.
Can anyone tell me if a splitter is a workable solution? Something like this:
7-Port USB High-speed Hub with Splitter Cable -- http://www.shop4tech.com/user.htm?go=view_item&id=8997&r=183 -- or perhaps other recommendations ..
Thanks.

...I recall reading that USB 2 was faster ... but I think they said faster than FW 400, but the drive I have is FW 800.
USB2 is 480mbps and Firewire400 is 400mbps. On paper, this would appear that USB2 is faster than Firewire400. But USB2 cannot handle large data transfers very effectively. I can't explain the technicals, but suffice to say that the figures I gave of 40min-versus-2-hours-for-25GB is typical of Firewire400 versus USB2.
Firewire800 is 800mbps, so would potentially be even faster. However the physical hard drive that's installed in the Firewire enclosure would be the bottleneck as a normal "platter" hard drive is much slower than Firewire400 or 800. If it were an SSD drive, then you'd likely see a very significant difference.
But regardless, USB2 cannot keep up with a large data stream like Firewire can. Potentially USB3, which is up to 5Gbps, would be faster than either Firewire 400 or 800, although I suspect would be on par with Firewire3200 in the real world. However since there are no adapters for either USB3 or Firewire3200 for the Mac, it's a moot point for now. (Your drive is not USB3, there are only a few USB3 drives available, and you'd need a Mac Pro to add the adapter in anyway, if they existed.)
So are you saying that FW 800 is faster than USB 2.0 -- and that I should be using the FW connection to get better throughput? And that I can resume daisy-chaining multiple external drives through the one port?
Definitely Firewire would be faster than USB. And I have 5 external hard drives daisy-chained through a single Firewire800 port on my Mac. So daisy-chained Firewire is the way to go.
Like I said, for the small, incremental, hourly Time Machine backups, the speed difference is insignificant. But when the day comes that you have to restore your hard drive, (i.e.: hard drive dead so you buy new blank hard drive. Or you just want to replace with a larger drive,) if say your Time Machine backup is 80GB, that restore would probably take several hours over USB2. On my Firewire400 drive, my 100GB Time Machine restore of my Macbook Pro took about an hour and a half. (The data transfer was about an hour, but OSX took awhile after that to finish up the restore.) YMMV, of course, but IMHO, use Firewire over USB2 as much as possible. If you're lucky enough to have a Mac Pro or iMac and can use multiple internal hard drives or eSATA, then that would be even faster than Firewire800. Only owners of a Macbook Air or non-Firewire Macbook should resign themselves to USB2.

Backup Drive for Time Machine FILLS UP FAST!

*Be forewarned!*
I have a new iMac 2.8 GHz with an internal 750GB drive (about 500GB free). I bought a 500GB external drive (Western Digital Book My Book™), and after just 4 days of running with Time Machine turned on, I get this error message, "Time Machine backup failed. Time Machine needs 175GB to backup, and only 150GB available." Huh?
I just spoke to someone at the Apple Store's Genius bar, and they recommend a backup drive that is twice the size of your internal drive. (which means a 1.5 TB drive: not cheap...LaCie costs $539)
Also, come to find out some programs simply "don't play nice" with Time Machine. A good example is MS-Entourage, which has a single database file (in the Main Identity folder) which holds all the info for your email, address book and calendar. Mine is 350 MB in size, and it is being backed up IN FULL every hour because, well...I use my email. And every time any changes are made to that single file, it is considered modified, which means it is backed up every hour on the hour, which can quickly add up.
The same is true for the Windows XP or Vista VM files created by Parallels or VMware Fusion. Each are single, 2+ GB files, and each time any change is made to this 'huge' file, it gets backed up repeatedly by Leopard's Time Machine.
_So the larger the backup drive for Time Machine the better_! I'm considering giving up on Entourage (kiss Microsoft goodbye!) and switching to Apple's excellent mail, address book and calendar programs!
Tim Liszt
LisZt Design

Tim,
I just switched from Entourage to Mail (for many reasons). Thus far, I love Mail. You may want to get the Widescreen plugin for it if you like the three-pane configuration of Entourage.
You should also be careful with Address Book if you have syncing set up in Entourage. In other words, probably should turn it off, along with any daemons you may have running. I lost data twice (once before my very eyes!) until figuring this out. Used Time Machine to restore a previous address book with all my contacts.
Thanks for the other information on this thread. Since I should be upgrading my old external drive anyway, it will help in purchasing a new machine for use with TM.
Message was edited by: SPD

New larger disk drive for Time Machine ..having trouble using it.

I must be missing something simple here. My Time Machine drive was getting pretty full so I went out and bought a larger drive. I assumed I could copy everything on the old drive to the new one ..then start up Time Machine and point it to the new drive and be in business. Not so. When I tried to copy the contents from one disk to the other the process locked up after about an hour. All activity stopped and I had no files on the new drive. To troubleshoot I simply copied a small folder from the smaller Time Machine drive to the new one..and it copied fine. However I noticed the date on the copied file was current so I assume my process is not a good one anyway as all the dates will be lost. Guess that will screw up Time Machine (after all what is time if its all the same ?). So ..how do I use a new larger drive for Time Machine..without loosing all the old stuff that is already saved. If I just select change disk from the Time Machine panel I assume I will only get backups from now ...and nothing older (from the old disk). I do not want to keep the older disk connected. So what am I missing here ??

Pondini wrote:
And I forgot to add: Disk Utility will do it.
I missed your post this morning.
I looked around and found the keys to get Disk Utility to do it. No $$ needed.
Thanks for the info.
For the rest of the viewers:
*How to change the Time Machine backup disk and migrate the current data to the new disk*:
This procedure performs block transfers, not file-by-file transfers. It avoids all the extended attribute, ACL and hierarchical problems. It just works - it's a Mac!
System Preferences:
..1 - Time Machine:
....1.1 - Turn OFF
..2 - Spotlight:
....2.1 - Privacy:
......2.1.1 add current TimeMachine volume to prevention list
......2.1.2 add new TimeMachine volume to prevention list
Disk Utility:
..1 - Select the target drive in the left pane
..2 - Select Partition tab
....2.1 - Volume Scheme: *1 Partition*
....2.2 - Options: *GUID Partition Table*
....2.3 - Select Apply -> Partition
..3 - Select Restore tab
....3.1 - Drag source Volume into Source window
....3.2 - drag destination Volume into Destination window
....3.3 - Check box: *Erase Destination* ( +this is the critical step+ )
....3.4 - Click Restore button (Wait for transfer to complete, minutes to hours depending on size & disk connections)
The source and destination volumes will now have the same name. Change the volume name(s) as desired.
System Preferences:
..1 - Spotlight:
....1.1 - Privacy: add new TimeMachine volume to prevention list
..1 - Time Machine:
....1.1 - Turn ON
Done!

My external hard drive is 'seen' by my iMac and I can go into the Finder and open files and folders. I am using the hard drive for Time Machine back up. However Time Machine says it can't find the drive. Same thing has happened with Final Cut Express.

My new LaCie external hard drive is 'seen' by my iMac and I can go into the Finder and open files and folders. I am using the hard drive for Time Machine back up. However Time Machine says it can't find the drive.
The same thing happened recently between Final Cut Express and my other LaCie external hard drive used as the Scratch disk. It fixed itself.
I've run out of ideas. Help would be very much appreciated. Thanks.

have you done some searches on FCPx and time machine? Is there a known issue with using a TM drive with FCPx? dunno but ...wait...I'll take 60 sec for you cause I'm just that kind of guy.... google...." fcpx time machine problem" Frist page link
http://www.premiumbeat.com/blog/fcpx-bug-best-practices-for-using-external-hard- drives-and-final-cut-pro-x/
You cannot have time machine backups on your hard drive if you intend to use it in FCPX.
booya!

Can i switch another hard drive for time machine

can i replace my time machine usb HD with a new larger one I have bought?

Sure you can. The real question is, can you transfer your old TM database to the new drive. This I would not attempt to do. I would add the new drive and point time machine to it in system preferences. This will cause you to do a full backup for the first time but you will know all the links are good this way. Before you remove the old TM drive, think if there is anything you want to restore.
My steps would be:
1) look through time machine to find anything you may want to keep, restore it if you want it
2) turn off time machine
3) power down and swap drives
4) power up and and format the new drive if needed, then open time machine preferences
5) select the new drive for time machine
6) sit back and let it do a full backup
How big is your internal drive? How full is it? How big is the new TM drive?

Is it possible to use an external hard drive for time machine backup and also as a regular hard drive?

Is it possible to use an external hard drive for time machine backup and also as a regular hard drive?

I am using an external drive in the exact way that you described. You just keep it plugged in to the computer when you want to access the movies and files. In order to put files on it, just go to finder open up the drive under devices and drag and drop files onto the drive. It is just like using a usb drive with a terabyte of space.

Brand new iMac 23.GHz Intel Core i5. Mounts external drive for time machine, then dismounts after backup is complete.

brand new iMac 23.GHz Intel Core i5. Mounts external drive for time machine, then dismounts after backup is complete.

The warranty entitles you to complimentary phone support for the first 90 days of ownership.
If you bought the product in the U.S. directly from Apple (not from a reseller), you have 14 days from the date of delivery in which to exchange or return it for a refund. In other countries, the return policy may be different. If you bought from a reseller, its return policy applies.

Mac mini as an external hard drive for time machine??

I have a mac mini from a few years ago and it is never used. I was wonder if it could be used as an external hard drive for time machine. If this can be done how do I go about setting it up for this type of useage?

Thanks for starting this thread. I too am trying to use my old mac mini in target mode to utilize it's hard drive for Time Machine.
I hope to strip it down to just it's OS (10.5) and use the remaining hard drive space for Time Machine backup.
Is it possible to just have it running at certain times for regular back in target mode? Or do I have to keep it on constantly?
I fear having to restart using the "T" command each time. Isn't there a way to just have it sleep and then have the ability to wake it up as I backup or restore?
thanks in advance for any help.
Vince

My 320GB external drive for Time Machine now only has enough capacity to keep a backup of one day. All my other backups are gone. What can I do to fix this situation?

I've been using a 320GB external drive for time machine for the last several years. The backups always worked fine and when necessary I was able to look at & restore older data from the time capsule. Recently, I keep getting the message that a backup cannot be completed and an older backup will be deleted. Usually this wasn't an issue because I still had several months of information on disk. Now a one-time backup takes up 315GB and therefore I only have a backup of the previous day. I don't understand this because I thought that the backup only saves information that has changed and doesn't copy everything everytime. What do I need to do to get my backups to a reasonable size so that I can keep at least 1 month data stored on it.? Please don't tell me I need a larger drive ... that would be too easy.

Get a larger drive for your TM backups.
The recommended size is 3 times what you are backup. So if 315 GB is a backup then you need a 1 TB drive.
Allan

Can I use a usb thumb drive for Time Machine?

Can I use a usb thumb drive for Time Machine backups?

Hello,
Yes you can use a (large) thumb drive. The most common format for a Time Machine backup drive is Mac OS Extended (Journaled).
Hope this will help.

Just bought a 3TB Firewire Drive for Time Machine, a Question About Mixing Files or Paritioning

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