Invalid Checksum when trying to use Seagate Backup Drive for Time Machine

Hi,
I'm trying to use a Seagate Backup Plus Drive with my Mac. It was originally used with a Windows machine. It does have the Seagate Dashboard Installer.dmg file. When I try to install it, it gives me an "invalid checksum" error.
I've also opened it in Disk Utility and attempted to reformat it into the Mac OS Extended (journaled) format, but it says it could not unmount the disk. I cannot see that it has any opened files that would be causing this problem. Any suggestions?
Thanks!

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

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Invalid Checksum when trying to use Seagate Backup Drive

Hi,
I'm trying to use a Seagate Backup Plus Drive with my Mac. It was originally used with a Windows machine. It does have the Seagate Dashboard Installer.dmg file. When I try to install it, it gives me an "invalid checksum" error.
I've also opened it in Disk Utility and attempted to reformat it into the Mac OS Extended (journaled) format, but it says it could not unmount the disk. I cannot see that it has any opened files that would be causing this problem. Any suggestions?
Thanks!

If you think your Mac is having hardware problems, I'd run the diagnostics that came with your Mac. If the diagnostics came on a separate disc, run them by holding down the "C" key while booting with that disc in the drive. If you only have one "system restore" disc, hold down the "D" key while booting with that disc in the drive.

I've used an external drive for time machine which has important files on it. After trying to back up my computer, it suddenly needed to be "repaired" by utilities. Now it's not being "seen" at all! How do I recover my important files off the drive?

I've used an external drive for time machine which has important files on it. After trying to back up my computer, it suddenly needed to be "repaired" by utilities. Now it's not being "seen" at all! How do I recover my important files off the drive?

If the external drive can be seen at all in Disk Utility, follow the instructions for repair here.

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!

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

Using external hard drives for Time Machine backups

I would like to let everyone know about an important issue regarding what type of media to use, or better said not to use for Time Machine backups.
I tried to use a RAID 0 array disks ( FIY: RAID is a storage technology that combines multiple disk drive components into a logical unit for the purposes of data redundancy and performance improvement.), but after a few minutes the backup suddenly stopped giving me a message of failing to write to the disk.
I tried to back up several more times, but the result was the same. I called Apple Customer Support, they said there was nohing wrong using a RAID 0 array disk combination.
I checked the RAID disks with disk utility, the disks were okay, but it did not solve the problem.
I reformatted the RAID disks, but that did no help either.
Then I used a different disk not part of any RAID array, and the Time Machine backup was able to successfull finish he task.
I called Apple to tell them about this issue, and they finall confirmed I was right:
Conclusion: backing up to a RAID 0 array disks using Time Machine does not work

Is there anything else on the drive? If not, just erase it with Disk Utility.
If there is, have you emptied the trash? That will take a very long time, and may present problems wtih locked files, permissions, etc. If so, see #E6 in Time Machine - Troubleshooting.

Cannot install Mountain Lion as the installer provides message that my target drive is using Time Machine. My target drive is my internal drive and I use an external drive for Time Machine. When I check the Time Macine set up under system prefereces it sh

Cannot install Mountain Lion as installer sys the target drive I have selected is using Time Machine. The target drive I selected is my internal drive. I have an external drive that I use for Time Machine backup. When I go to System Preferences and look at the Time Machine set up it shows my target disk is the external drive. What to do?

Yes, you’ll be able to do that.
(116841)

I want to use my 1TB Seagate Hard drive for time machine and transferring files from Mac to PC.

For about a year I've been using my 1TB external hard drive for only time machine. To be honest, it wasn't until today that I tried to connect my hard drive to a PC and realize it isn't compatible. I read about partitioning the hard drive so that it can work both for time machine and transferring files between pc and mac. I'm not what you would call tech savvy, so I was wondering if I can get some advice on how to do this.
Thanks in advance.

To do it, you have to partition the hard disk, so you will have one partition for Time Machine and another one to store files and use them in a PC and Mac. To create the partition, follow these steps > http://pondini.org/OSX/DU3.html
In order to read and write in the external disk on the PC, you have to select "MS-DOS (FAT)" as "Format". If you choose any other option, the PC won't be able to read your external disk. Apart from that, note that you can't use files bigger than 4 GB with FAT. If you want to use the external disk with files bigger than 4 GB, you have to format your new partition in exFAT, and you have to do it on a PC

Use portable hard drive for Time Machine & other things

I recently purchased a 1 TB portable hard drive. I'd like to use it for my Time Machine backups, as well as moving my iTunes library there. Is this an easy change? I'm not super familiar with hard drive set ups. Will I have to create any partitions on the drive?
Thanks!

You're welcome. Make sure your drive is formated as Mac OS Extended (journaled), GUID partition table.
Here's a nice link to use for Time Machine information.
You can partition the drive if you want to organize your various backups. For example you might create a Time Machine partition and Other Files partition. When Time Machine is working, it creates a folder (Backups.backupdb) and places the Time Machine backups in that folder. The rest of the partition is open to add whatever you want. I have multiple partitions on my USB external drive with Time Machine backups separated from other backups.

Using External Hard Drive For Time Machine

Hi. I will be buying a new iMac and plan to use an external hard drive by Lacie for Time Machine backups. I haven't used an external hard drive for this purpose before -- previously I've always used Apple's Time Capsule. So, I don't know if I can leave the Lacie hard drive unejected and powered on even when I've shut the computer down. The Time Capsule never needs ejecting from the desktop and is always on, but I'm not sure if the same can be done with an external hard drive when using it for time machine backups.
So, I just need to know if, when using an external hard drive such as a Lacie for Time Machine backups, I can 1. leave it unejected even when I shut down the computer? and 2. Can I also leave the hard drive powered on even when I shut the computer down? It would be good if I could do this because then it would just always be on and ready for hourly time machine backups without my having to remember to turn it on and the eject it when it's finished for the day.
I'd appreciate any advice or information.
Thanks in advance.
John

pulp3au wrote:
1. leave it unejected even when I shut down the computer?
What are you referring with "unejected"? You should know that LaCie drives have got three modes: "On" (permanently turned on), "Auto" (when you turn off your computer, your external disk turns off or you unmount it) and "Off". Choose the one you want.
pulp3au wrote:
2. Can I also leave the hard drive powered on even when I shut the computer down? It would be good if I could do this because then it would just always be on and ready for hourly time machine backups without my having to remember to turn it on and the eject it when it's finished for the day.
Of course. You can leave the external disk turned on when your Mac is turned off without any problem. In "Auto" mode you won't have to do anything in order to turn it on again

Can I use an external drive for Time Machine and storing other data?

At the moment I have one external drive, a 500gb LaCie. My internal drive is 160gb. I don't think I'll be using all 500 of those gigabytes for a while, so I want to put them to good use. Can I make a partition on this drive and use that for Time Machine, leaving the rest of the drive for my documents and other files? If so, how would I partition the drive? I'm not fluent in Disk Utility and even though I'm pretty sure I know how to do it, I don't want to screw up. Also, how big a partition would you recommend?
While we're here, I have a second question, somewhat relevant to the first. Could I move my Time Machine backups to a second drive if I wanted to? Also, if I used a big drive (say 1tb) could I use Time Machine to backup my current LaCie to a partition on that drive? Thanks in advance.

videoCWK wrote:
Does that also mean that I could back them both up on a very big drive?
Yes. Time Machine will, by default, back up all of your external drives unless you specifically exclude them.
Also, will Time Machine backups eat all my space after a lot of usage?
It depends on what you do on your Mac. If you work often with very large files (video editing, heavy photo editing, big disk images, Microsoft Entourage data file, Parallels disk image file, etc) then your backup drive could fill up very quickly.
I use my Mac mostly for e-mail, web browsing, iTunes, iPhoto, and the occasional iMovie project. I have 92 GB on my main hard drive (60 GB of which are my iTunes and iPhoto libraries, and one iMovie project.) My Time Machine backups consume 155GB on my backup drive, and that's after using Time Machine for a full year.

Using an External Drive for Time Machine and Other Things

I have a 2TB external drive which I use for Time Machine Backups on my 2 macs. The macs have HDs of 500GB and 160GB so the external drive has ample space for backups.
Is it okay to use the external drive for other things that I don't care if they aren't backed up (like digital copies of DVDs)? i.e. Will Time Machine cause any issues if a drive is used for more than just Time Machine backups?

rgraves wrote:
I have a 2TB external drive which I use for Time Machine Backups on my 2 macs. The macs have HDs of 500GB and 160GB so the external drive has ample space for backups.
Maybe. See #1 in [Time Machine - Frequently Asked Questions|http://web.me.com/pondini/Time_Machine/FAQ.html] (or use the link in *User Tips* at the top of this forum).
Is it okay to use the external drive for other things that I don't care if they aren't backed up (like digital copies of DVDs)? i.e. Will Time Machine cause any issues if a drive is used for more than just Time Machine backups?
It's best to put such things in their own partition. See #3 in the FAQ.
You may also want to make separate partitions for each Mac's backups, if you're backing-up either one directly (ie, not over your network). See #4 in the FAQ.

I deleted a specific file folder from my Seagate backup drive, via Time Machine. Instead of only deleting that file, it deleted ALL my files for that date.

1. Why? I was quite obviously selecting one file folder ONLY.
2. Is there any way to retrieve the lost items?
3. How do I avoid this happening in the future?

Never had any issues while deleting specific files/folders from a time machine backup.
However, regarding the original post, what do you mean by "file folder"? Did you select a FILE for deletion, or a FOLDER? These two terms tend to be quite different, you know.
If you selected a FOLDER, then ALL FILES inside the folder have been deleted. If you selected a single FILE, then only that file should have been deleted. "Delete all backups of..." is a completely different story.

What size backup drive for time machine on 500gb MBP?

I'm sure this is a really novice question, but I couldn't find the answer on the forum.
I've just got a MBP with a 500gb HDD. I won't be buying a Time Capsule, but I'd like to set up Time Machine to backup to an external USB HDD. What is the optimum size for this?
I see that time machine keeps deleted files, I'm not sure if it uses compression, and I'm not sure what happens when I run out of space... does it reduce the number of duplicates that it keeps, or will I run into a problem?
Really, what I'm trying to find out is: I have an old 500gb HDD that isn't being used for much. Is this sufficient to back up a 500gb HDD (assuming that, at some point, I'm going to be hovering around maximum capacity on the MBP)?
Thankyou!

Hi and welcome to Discussions,
our local Time Machine 'Guru' Pondini has made a very thorough FAQ on it to be found here http://discussions.apple.com/thread.jspa?threadID=1964018
Quoted from it (section 1):
"A general "rule of thumb" is, TM needs 2 to 3 times as much space as the data it's backing-up (not necessarily the entire size of your internal HD).
But this varies greatly, depending on how you use your Mac. If you frequently add/update lots of large files, then even 3 times may not be enough. If you're a light user, 1.5 times might do. Unfortunately, it's rather hard to predict, so if in doubt, get a bigger one!
Also, there are some OSX features and 3rd-party applications that take up large amounts of backup space, for various reasons. See question #9 for details.
This is a trade-off between space and how long TM can keep its backups, since TM will, by design, eventually use all the space available. But it won't just quit backing-up when it runs out: it starts deleting the oldest backups so it can keep making new ones. Thus, the more space it has, the longer it can keep your backups."
Regards
Stefan

Using external NAS drive for Time Machine and multiple Macs

I just installed an external NAS drive from OWC's sister company Newer Tech. It is 500g with ethernet and usb2.0 connections. It works very well with easy setup with Time Machine with no hassle.
However, in very fine print that I missed in the ad, it supports 20 computers but not for Mac only for PC. OWC customer service said I could return it but I'll keep it anyway since it works well but only for one computer at a time in read/write mode.
Anyone know of a way around this? Are there any drivers from other vendors that would allow this to be used with the multiple Macs on my home network?

Very doubtful, but even if there is a workaround, you do not want to take that kind of risk with your backups.
See the pink and yellow boxes in #2 of [Time Machine - Frequently Asked Questions|http://web.me.com/pondini/Time_Machine/FAQ.html] (or use the link in *User Tips* at the top of this forum).

Invalid Checksum when trying to use Seagate Backup Drive for Time Machine

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