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When i updated my Mac Pro to 10.9.2 it stopped ready my external hard drives, i did verify disk and repair it gave me "Updating boot support partitions for volume as required". Everything was fine before the update. Please help
MacBook Pro, OS X Mavericks (10.9.2)
Click the "Mount" button at the top.
Clinton
As clinton and I have said you have Tuxera installed which allows you to Write to that drive.
But your problem is coming from that drive not being Mounted. Which if you can't mount it then there is something wrong with the drive. All drives, in good working order and getting the proper power from the USB port, will Auto Mount when connected.
First thing you should do us highlight the Drive Name and Right Click on them and select "Eject Disk" from the menu that comes up. Then Unplug that drive from your Mac. Once you do that to both drives then Restart your Mac to get a fresh clean boot of OS X.
Once the system restarts connect only one of those drive and see if it Auto Mounts.
If it does I suggest you Copy all the important files off it and place those files in a folder on your internal drive.
Then Eject that Disk and connect the other one and again If It Mounts Copy the files off it to your internal drive, That is IF you have enough space on your internal drive.
If one or the other or both do not Auto Mount when connected them there is a problem with either the physical drive in the external enclosure or a problem with the enclosures electronics that is stopping the drive from Auto Mounting. In either case you will have to find out which part has failed, Drive itself or the Electronics.
If just the enclosures electronics has failed you can remove the physical drive from that enclosure and use a SATA to USB Adapter to connect the physical drive to your Mac to get the data off it.
Tuxera, NTFS and a WD drive
Sounds like the Perfect Storm.
I tried to Mount to both of them but " The disk “My Passport” could not be mounted.Try running First Aid on the disk and then retry mounting."
I'll try to eject them as you told me and see if it works.
I suspect your problem comes from one of 2 things. Mac notebook are notorious for not putting out enough power on the USB ports to fully power up external drives that are USB Bus powered. Even if at one time they did work once the drive starts to get filled up with data it take s more power to properly read and access that data because the Read/Write heads of the drive have to move farther to read all the data.
One way around that is to use a Y USB cable that connects to 2 USB ports at the same time to supply more power to the drive.
The other reason why you now can't mount either of those drives is the drive ir enclosure electronics has failed.
So the problem comes from the external hard drive, not from the Laptop?
Every Mac laptop I tested put out (steady state) 5V @ .5A from its USB2 ports (1A peak). This is exactly what the USB (2) specification calls for.
Any drive requiring more than that is non compliant with the USB specification and should have an external power supply (or one of those doubleheaded cables)
I have yet to test any USB3 ports under load but the spec calls for more power than a USB2 port.
Yes it is more than likely a Drive problem. Do as I suggested with a Restart of your Mac and connect only one drive at a time. If the same problem happens, the drive does not Auto Mount, then the drive is the cause.
Alamarat wrote:
So the problem comes from the external hard drive, not from the Laptop?
No real need to reply to your statement because it is well documneted that Mac notebooks have problems supplying enough power to Bus Powered external drives. In some cases the USB ports will actually Shut Down and give you an Error about something drawing to much power. But those same drives and or devices work fine on other compters, Mac's or Windows boxes.
Please lets not confuse the issue the OP is having. Thanks.
Csound1 wrote:
Every Mac laptop I tested put out (steady state) 5V @ .5A from its USB2 ports (1A peak). This is exactly what the USB (2) specification calls for.
Any drive requiring more than that is non compliant with the USB specification and should have an external power supply (or one of those doubleheaded cables)
I have yet to test any USB3 ports under load but the spec calls for more power than a USB2 port.
Thank you very much for the your time and help, all of you. I'll try to uuse another computer to chechk the data and then try to use another drive or USB cable.
LowLuster wrote:
No real need to reply to your statement because it is well documneted that Mac notebooks have problems supplying enough power to Bus Powered external drives. I
Please share this documentation with us then, I have not found that Apple devices are incapable of supplying the amount of power required by the USB specification to be true.
And as you are stating that Apple sell devices do not meet the USB2 specification I would like some attribution for that.
Link please.
Yes, I have seen those, none of which has any actual fact in it.
Bad updates, bad cables and keyboard pass throughs are proof of user error, not inadequate power (you did read them before linking I assume)
So I take it that you have no actual support for the claim that Apple laptops can not supply the power required by the USB specification?
Let me know when you do.
LowLuster,
The first two links are concerning "Hackintoshs" and the third looks as if it's software related. I run multiple USB devices from my Mac and the three USB ports on my TB Display and my USB keyboard and have never had a power problem.
I don't believe that you've answered Csound1's query...
Clinton
"Updating boot support partitions for volume as required"
