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Problems Formatting External hard drive on MBP
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 Member Since: Apr 08, 2012
Posts: 4
 
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04-08-2012, 02:05 PM
Conventional Efforts: When I plug it in to my MBP (via Firewire 800), it shows up on the desktop as mounted. However, when I try to access the files on it via Finder, Finder crashes (beachball). I open disk utility, and I can see the disk. When I press erase, the dialog is stuck at "Unmounting Disk". Why does this happen? What can I do to help debug the problem? |
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Member Since: Apr 26, 2008
Location: Belgium
Posts: 1,836
 Mac Specs: 2008 MBP 17" - 10.8.2 & iPad - iOS 5.1
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04-08-2012, 02:25 PM
Could it be that the disk is being indexed by spotlight ? Also, does the disk have another interface to try like USB ? Cheers ... McBie " Everything should be made as simple as possible, but not one bit simpler. " A. Einstein The problem is not the problem. The problem is your attitude towards the problem. You understand ? |
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Member Since: Apr 08, 2012
Posts: 4
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04-08-2012, 02:41 PM
Quote:
Voldemort [~] $ diskutil unmountDisk /dev/disk1 Unmount of disk1 failed: at least one volume could not be unmounted Attempt in Terminal [USB 2.0] Voldemort [~] $ diskutil unmountDisk /dev/disk1 Unmount of all volumes on disk1 was successful -- so the unmounting worked here Voldemort [~] $ diskutil list /dev/disk1 /dev/disk1 #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *1.5 TB disk1 1: EFI 209.7 MB disk1s1 2: Apple_HFS THE PIT 1.5 TB disk1s2 Voldemort [~] $ diskutil eraseDisk HFS %noformat% /dev/disk1 Started erase on disk1 Unmounting disk Creating partition map Error: 22: POSIX reports: Invalid argument Voldemort [~] $ diskutil list /dev/disk1 /dev/disk1 #: TYPE NAME SIZE IDENTIFIER 0: *1.5 TB disk1 -- So the volume information is gone Voldemort [~] $ diskutil eraseDisk HFS %noformat% /dev/disk1 Started erase on disk1 Unmounting disk Creating partition map Error: 22: POSIX reports: Invalid argument -- but I still can't erase the disk EDIT: Even though POSIX gives an error, I then formatted the disk with diskutil, and it seems to be working just fine... Last edited by snow; 04-08-2012 at 03:14 PM. |
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Member Since: Apr 26, 2008
Location: Belgium
Posts: 1,836
Mac Specs: 2008 MBP 17" - 10.8.2 & iPad - iOS 5.1
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04-08-2012, 03:33 PM
Glad it worked out for you on USB ( if I understand this correctly ) Cheers ... McBie " Everything should be made as simple as possible, but not one bit simpler. " A. Einstein The problem is not the problem. The problem is your attitude towards the problem. You understand ? |
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