Currently Being ModeratedApr 27, 2013 7:24 PM (in response to Raja Hornstein)
I've had the same issue. It's not the Mac that is at fault. It's the powered hub.
Try another brand.
Dynex at Best Buy has worked well for me....4 drives all hooked up simultaneously in a recent test. Flawless operation using LaCie drives.
I would avoid any hub with the Belkin name on it. (Tried 3 different models and none worked).
Currently Being ModeratedApr 27, 2013 7:37 PM (in response to Bob Timmons)
I saw a post saying precisely the opposite, i.e. only the Belkin one works. I've been using a D-Link and just ordered a Belkin. This makes me think that it's not the hub. It's definitely not the Mac, although it could be the Airport, or I think the problem is the OS. The fact that I had it working reliably for many weeks with my hub, had to use the disk briefly in a different setup, and then couldn't get it work again suggests it isn't the hub, as does your suggestion to avoid Belkin and another suggestion to use only Belkin. Wouldn't it be nice if Apple paid attention to this; it seems like a common problem in something they advertise as simply plug and play.
Currently Being ModeratedApr 27, 2013 7:48 PM (in response to Raja Hornstein)
Good luck with the brand that you choose. It might be the answer for you.
In my case, the "no name" brand has worked perfectly for months while I had constant reliability issues with the "name" brand through 3 different operating systems....Snow Leopard, Lion and Mountain Lion.
Foolishly, I blamed the problems on the Mac operating systems.
Currently Being ModeratedApr 27, 2013 10:30 PM (in response to Raja Hornstein)
Raja Hornstein wrote:
I saw a post saying precisely the opposite, i.e. only the Belkin one works. I've been using a D-Link and just ordered a Belkin. This makes me think that it's not the hub.
Bob asked me to poke my nose in.. but he is smarter than me when it comes to USB.
Brand name hubs, still use a whole variety of USB chips.. depending on who is the cheapest supplier this week.. some work and some don't as the firmware in the Extreme has very little space for drivers. .so only a few major ones are available.. Since it did work though I would not expect it to stop working. Power supplies especially my experience with dlink suggests they are the cheapest known to man.. 5v 2a supply they should be using and about the size of a mobile phone charger are often pathetic.. and that is a kindness.
Mostly when the hub is plugged into the Mac it works fine. Which adds no end to the confusion. But the OS has a lot more room for drivers of a far greater range of chips.
I would plug the hub into the mac with both hard disks.. then do a careful check of the format on both.. a verify but make sure both are formatted HFS+ (ie the Mac OS extended journaled) and GUID partition not MBR as for windows or even AFP which is older apple standard.. both disks should be the same.
Currently Being ModeratedMay 1, 2013 4:11 PM (in response to LaPastenague)
Both volumes are Mac OS extended journaled. One is GUID partition; one is a logical volume group because it has an encrypted partition. When I plug them into the mac through the hub they both show up fine (the encrypted partition doesn't show up when I plug into the Airport Extreme, but other partitions on that disk show up). I have tried three hubs now. First the D-Link, which I agree is junk, but which worked reliably for weeks showing both disks through the Airport. Second, a new Belkin, probably not the best, but new. And third, a professional USB hub with a power supply rated to supply enough voltage simultaneously to all 7 ports. I can't get it to work again. This reminds me of SCSI voodoo. I'm not sure that those who say it's the hub are right any more, especially after trying two new hubs. The drives and cables seem to be okay, i.e. they work into the Mac. I'm tearing my hair out here. Any thoughts?
Currently Being ModeratedMay 1, 2013 7:41 PM (in response to Raja Hornstein)
If Best Buy will give you a return privilege, try a Dynex hub.
It has worked flawlessly for me for many months. By far the best hub that I have used...and I've used many of them. But others will probably say it is junk.
No one can say if it will work or not for you. Good luck.