Q: Persistent disconnect is causing iPhone backups to fail
This is driving me crazy. I cannot backup my iPhone 6S (running iOS 9.2.1) to iTunes (v 12.3.2.35, on Mac OS X 10.11.2). Sooner or later -- often, very near the end, according to the blue thermometer at the top of the iTunes page -- I get "iTunes could not backup iPhone because your iPhone disconnected."
I've Googled ad nauseam and tried a zillion things:
1) Deleting existing backup from iTunes.
2) Deleting the lockdown folder.
3) Backing up from a new account on my iMac.
4) Trying a new USB cable to a new port on my iMac.
5) Rebooting the iMac and the iPhone.
6) Rebooting the iMac into safe mode.
7) Increasingly aggressive resets of the iPhone. Most recently, in desperation, I erased it entirely, restored to factory configuration, and am slowly adding apps back one by one. (This is a royal pain that has consumed many many hours of my life.)
Other info: My phone has never been jailbroken. iTunes WiFi Sync is disabled. There is no USB hub between my Mac and my iPhone. The Console info is particularly unhelpful, consisting of:
1/22/16 2:07:40.528 PM AppleMobileBackup[7812]: WARNING: Backing up eaa70d4338aaa4b810adf76a8cb7a8d75a5978fb
1/22/16 2:08:06.375 PM AppleMobileBackup[7812]: 7812:2215936|SocketStreamHandler.c:_SocketLogCallback| ERROR: SocketRecv (data): return of 0 bytes
1/22/16 2:08:06.378 PM AppleMobileBackup[7812]: 7812:2215936|StreamHandler.c:_ReadFunc| ERROR: Error reading data: Can't read data
1/22/16 2:08:06.380 PM AppleMobileBackup[7812]: 7812:2215936|DeviceLinkConnection.c:_DLHandlerThreadReadMessage| ERROR: Could not receive message: '(null)'
1/22/16 2:08:06.381 PM AppleMobileBackup[7812]: 7812:170557440|DeviceLinkConnection.c:_DLMainThreadMessagePortCallback| ERROR: Error creating components from read data: 'NULL data returned from read'
1/22/16 2:08:06.383 PM AppleMobileBackup[7812]: ERROR: Connection to device lost (MBErrorDomain/200)
1/22/16 2:08:06.384 PM AppleMobileBackup[7812]: ERROR: Backup error: -10
1/22/16 2:08:06.386 PM AppleMobileBackup[7812]: 7812:2215936|SocketStreamHandler.c:_SocketLogCallback| ERROR: SocketSend (data): error 32: Broken pipe
1/22/16 2:08:06.388 PM AppleMobileBackup[7812]: 7812:2215936|StreamHandler.c:_WriteFunc| ERROR: Error sending data: Can't send data
1/22/16 2:08:06.390 PM AppleMobileBackup[7812]: 7812:2215936|DeviceLinkConnection.c:_DLHandlerThreadMessagePortCallback| ERROR: Could not send disconnect message: 'Error writing length of data'
(And why can't Apple tell me WHICH FILE is being processed when the data error occurs? Grr.)
And, of course, each troubleshooting step takes most of an hour while I see if that is the key to getting a backup to work. I'm tearing my hair out, and I don't have too much hair left to lose. Any suggestions, other than just living dangerously and running without a backup?
iPhone 6s, iOS 9.2
Posted on Jan 22, 2016 11:29 AM