Airport Extreme Disk Sharing Errors

I have a RAID 1 set hard drive enclosure connected to an Airport Extreme. There are two 1 TB hard drives in the set, and one is the backup. I have partitioned it into two partitions, Time Machine and Scratch.


Recently, I have had trouble connecting to the shared disks. They work for a while once I reboot the Airport or reset its options, but then about half an hour later, I get an unknown error when trying to mount a volume. I can connect to it, but I cannot mount any shares. This does not stop until I reboot the Airport, but then it works for only 30 minutes again.


Does anyone else have this problem? I tried Googling but only found novices trying to set up WPA authentication...

iMac6,1 (Late 2006 iMac Intel), 3 GB RAM, 2.33 GHz Processor, 2 TB internal HD, Mac OS X (10.5.8), Minor GUI mods, a lot of stuff connected with FireWire or USB

Posted on Jul 19, 2011 9:36 AM

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17 replies

Jul 19, 2011 5:27 PM in response to Tesserax

I don't see anywhere where Apple says that they do not support it, but they don't mention it at all. However, Time Machine Preferences does not complain when I use an Airdisk, in fact, it has a custom window telling me to insert my Airdisk password.


Also, this forum has a tutorial on how to do it, and their instructions match what I did: http://lowendmac.com/zisman/09az/airdisk-time-machine.html


I have reformatted the disk about 3 times and repartitioned it. When I try to do a repair after the Airport stops working, it reports no problems. Also, I've been doing Time Machine on this for a while now with no issues.


I'll repartition it to 1 partition, but I doubt that will help.

Jul 19, 2011 7:30 PM in response to Mac OS 9000

If you stop to think for a second.

If Apple supported using any USB disk connected to air AirPort Device for use as a Time Machine device there would be no reason whatsoever for the Apple Time Capsule would there?


Your best bet is to connect a USB drive that you want to SHARE, to the AirPort USB port. and the device that you want to use as a Time Machine Backup connect directly to the computer it's backing up.


If you want to back up multiple machines to one harddisk, or partitioned disks as you describe you should look into a NAS (Network Access Storage) device. You can buy an enclosure and add your own hard drives, updating and increasing their size as you need to.

Jul 20, 2011 4:46 AM in response to Mac OS 9000

It does work, to a degree, for some. But it's unreliable; has been since day one of Leopard. There are many, many threads in these forums where it worked fine for days, weeks, or months -- then the backups turned up corrupted.


There's speculation that it's the different hardware in the Airport Extreme, that doesn't allow a large enough buffer and/or rigorous detection and correction of WIFI problems to deal with power loss, interference, etc. Apple has never explained it.


Perhaps when a new Airport Extreme appears, it will be more reliable and supported.

Jul 20, 2011 9:27 AM in response to Pondini

I've never had my computer able to do Time Machine backups for a very long period of time. I'd say the longest I had it working was a few months, then something happened to my computer that required an OS reinstall (I had a corrupt system somehow for a while).


There are threads on other sites saying that firmware 7.5.2 and OS 10.5.3 worked with Time Machine, but as you said, this could be just an illusion that the firmware has anything to do with it.


Considering the fact that the difference between the time when it worked and the time when it didn't was only the location of the device, the Mac OS version, and the Airport firmware version, it's worth a try.

Jul 20, 2011 3:37 PM in response to Pondini

Well, I think I found a workaround based on what you have on your site, Pondini. This seems fine, but tell me if I made any mistakes.


Connect early 2007 MacBook Pro (10.5.8) to disk with 2 partitions (TM and Scratch) in GUID table, each Mac OS Extended (Journaled). Enable AFP. Connect to MacBook Pro using my iMac and mount "TM" disk. Back up to TM disk with Time Machine to create the sparse bundle. Disconnect disk from MacBook Pro, connect it to AirPort Extreme, then back up to that later. Do you think this kind of AFP setup would work? I'm on gigabit ethernet by the way.


The reason I don't want to do what you suggested on your site, connect the disk to the Mac after one canceled attempt, is because my iMac is not easily or safely portable, and the disk is stuck in a highly bundled entertainment system connected to the Airport.

Jul 20, 2011 3:50 PM in response to Pondini

The idea is that the unstable USB on the Airport will hold long enough to complete a quick backup. It seems to work for around 30 minutes. By then, it should have copied everything besides the first backup. On the first backup, I have to do it without the Airport. Besides, it's really my only choice.


And I do have other backups in the form of clones by Carbon Copy Cloner. They are weekly to prevent a corrupt-then-backup situation, but I wanted Time Machine for more frequent backups at the cost of stability.

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Airport Extreme Disk Sharing Errors

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