Currently Being ModeratedFeb 14, 2011 12:33 AM (in response to mtnmedic)FIXED IT!
Before I got to my fix, here are the things I tried, none of which seemed to resolve the issue or improve the situation:
*Checked cables and connections
*Restarted my PC
*Checked to make sure PC date/time/time zone were all accurate
*Checked to make sure my security software (MS Security Essentials and Windows FIrewall) were up-to-date and no conflicts
*Made sure I had proper permission for the iPad backup folders. To ensure that, I selected the folders and clicked on "Take Ownership" in the context menu.
*I made sure that my user account is an Administrator account on this PC
*I logged out of my primary user account and logged in as the Computer Administrator (basically, a different user acccount that is an Administrator) and tried to do the backup to iTunes from there.
Failing with all of those things, many of which are suggested from the Apple knowledge base, I was just about to backup my iPad onto another machine, then transfer the backup to this PC and restore the iPad from here using that file, maybe even removing and re-installing iTunes, etc. Everything so far short of wiping the iPad and starting over from scratch, which I feared might end up happening.
Then, a lightbulb went off in my head. Why not do a reset on the iPad itself? Not the usual soft reset but the kind of reset that restores function to an iDevice when it isn't responding: press and hold both the Power and Home buttons at the same time and hold them until the device restarts, ignoring the "slide to turn off" prompt. After it finished booting up, I connected it with my PC, which brought up iTunes automatically, then...lo and behold, instead of seeing the rapid synch then error, it went right into backup. Took about fifteen minutes but it finished the backup without a hitch and synched the iPad.
So there you have it: one more thing to try. Maybe the FIRST thing you should try? It was so simple! I wish I'd figured that out BEFORE I did all that other stuff I mentioned above!
I'd like to read comments from anyone who has also experienced this problem and has tried my "fix" suggestion.Dell XPS One, HP Tablet PC and Sony Vaio P530H Ultraportable, Windows Vista, iPad 64GB WiFi+3G!!
Currently Being ModeratedFeb 16, 2011 6:20 PM (in response to mtnmedic)Yes, I've been getting these error messages (and hosed backups) myself of recent.
I found that the way to rectify it is a two step process, both of which you've included in your list. For me, if I remove my iPad backups (~/Library/Application Support/MobileSync/Backup/, and then whichever files correspond to the backups listed in iTunes' Preferences/Devices tab) and then a hard reset, my next few syncs will backup correctly. While testing, I'd just move the specific backups to my desktop until I was sure the new backup worked properly.
Next time, I may just go out to Time Machine and restore a prior version of the backup directory to see if that works. This happens every week or two, so it won't be too long before I have to do it again, I'm sure. I'm not 100% sure, but this may be related to how many tasks I have in the background when I do the sync.MB 2.4GHz black Mini 2.0GHz MBP 2.4GHz MB 1.83GHz iPad 3G 64G, Mac OS X (10.6.6)
Currently Being ModeratedFeb 20, 2011 8:13 AM (in response to Alphaman.)
Next time, I may just go out to Time Machine and restore a prior version of the backup directory to see if that works. This happens every week or two, so it won't be too long before I have to do it again, I'm sure. I'm not 100% sure, but this may be related to how many tasks I have in the background when I do the sync.
And it has happened again. This time, I think I'm starting to see a pattern; if there are lots of apps in the background on the iPad, the backup will fail. I tried to be careful about this since the last failed backup, and closed all background tasks before syncing, but last night, I forgot, and the backup failed.
I rebooted my iPad, closed all background tasks, and tried the sync again -- no joy.
I restored my iPad's backup from my Mac's Time Machine backup. I first looked in my iTunes Preferences to find the date and time of the most recent (failed) backup. I then went into Time Machine, looking at the ~/Library/Application Support/MobileSync/Backup/ folder, and scrolled back in time to the next previous (successful) backup, as evidenced by the change in the date stamp on the folderWithAHugeHexadecimalName.
I just sync'd my iPad, and all is fine.
The problem seems to be in the iPad not having sufficient memory to be able to do a proper backup if there are too many apps running in the background, resulting in the backup saved by iTunes being corrupted. Restoring the iTunes backup directory from a Time Machine backup will resolve the corruption problem.
Hope this helps someone else!MB 2.4GHz black Mini 2.0GHz MBP 2.4GHz MB 1.83GHz iPad 3G 64G, Mac OS X (10.6.6)
Currently Being ModeratedFeb 20, 2011 8:54 AM (in response to mtnmedic)That's why I think it's important to do the hard reset on the iPad (as I described in a couple of posts above), which is generally used when the iPad doesn't respond or turn back on, etc. That was the one thing that clearly did it for me. I agree that if there are background processes and lack of memory available on the iPad a problem will occur. If I had another iPad I would be trying very hard to duplicate this problem and see if this is, in fact, what we're dealing with.Dell XPS One, HP Tablet PC and Sony Vaio P530H Ultraportable, Windows Vista, iPad 64GB WiFi+3G!!
Currently Being ModeratedFeb 25, 2011 7:14 AM (in response to mtnmedic)The same thing happened to me and I was about to go through the whole troubleshooting steps.. but your approach worked perfectly. I did a hard restart and it works just fine. Thank you!Mac Book, Mac OS X (10.6.6)
Currently Being ModeratedFeb 26, 2011 9:27 AM (in response to mtnmedic)
That's why I think it's important to do the hard reset on the iPad (as I described in a couple of posts above), which is generally used when the iPad doesn't respond or turn back on, etc.
I think maybe I should have been clearer -- I did do a hard reset after my first sync failed. I then had to restore from Time Machine because the backup of my iPad in iTunes was corrupted by the first sync that failed.
You can alternatively just delete the backup, and iTunes will generate a new one, but that will take a fairly long time to backup your entire iPad (esp. if you, like me, have a 64G model). In my case, I found it to be faster just to restore the TM backup than do a completely new backup. YMMVMB 2.4GHz black Mini 2.0GHz MBP 2.4GHz MB 1.83GHz iPad 3G 64G, Mac OS X (10.6.6)
Currently Being ModeratedFeb 26, 2011 6:26 PM (in response to Balajee)Cool! I'm glad it worked for you! My work here is done. :-P
Message was edited by: mtnmedicDell XPS One, HP Tablet PC and Sony Vaio P530H Ultraportable, Windows Vista, iPad 64GB WiFi+3G!!
Currently Being ModeratedMar 13, 2011 7:19 PM (in response to mtnmedic)Even better -- it appears the problem has been fixed with the combination of iOS 4.3 and iTunes 10.2.1. I've tried several times since upgrading to get this to fail as before, including having a dozen or more apps running, and in the half dozen or so times I've tried it since upgrading, not a one has failed.
I just did it again, no reboot, and with 30 apps in the background (take THAT Android -- which starts randomly killing background apps at 10!) and had NO problem.
Thanks, Apple. I, for one, appreciate that you listen!MB 2.4GHz black Mini 2.0GHz MBP 2.4GHz MB 1.83GHz iPad 3G 64G, Mac OS X (10.6.6)
Currently Being ModeratedMay 4, 2011 11:16 AM (in response to mtnmedic)
Yup, That worked like a charm.
Currently Being ModeratedMay 4, 2011 2:02 PM (in response to mtnmedic)
I tried all the fixes (restarting both computers, resetting clock time, deleting backups, etc.) listed on various boards since my iPad stopped backing up last week. What had been a nuisance became critical when I downloaded iOS 4.3.3 today and after going through the whole process, the "can't backup/can't start a session" warning stopped the installation.
The Fix: By happenstance I disconnected & restarted by iPad and then Signed Out of iTunes from menu bar, Quit iTunes then relaunched it & when I Signed In, it started backing up right away, and has been fine since.
Currently Being ModeratedJun 19, 2011 9:55 AM (in response to Alphaman.)
After doing a hard reset on the iPad, I still had sync problems. I didn't realize that a had reset didn't close the open applications. Closed them by hand ( finger - haha ) then resynched the iPad. Worked like a champ.
Currently Being ModeratedJun 21, 2011 3:19 AM (in response to mtnmedic)
Had same issues are reported.
These steps worked perfectly:
Essentially: Deleteing the 2 Apple Services, Restarting and finally re-installing iTunes
Currently Being ModeratedJun 27, 2011 4:32 PM (in response to mtnmedic)
No, it didn't work for me... I did the hard restart you suggested and the error is still coming up. Back to the drawing board! But thank you very much for taking the time to put your suggestions up, mighty nice of you!
Might get my husband to figure this one out... I'm too lazy.
Currently Being ModeratedJul 19, 2011 3:39 AM (in response to mtnmedic)
Thanks so much. Your 'lightbulb' moment re-start worked for me (the second try!) and I knew absolutely nothing about ipad's workings when this happened this morning.