Posted by: Vivek Gite The author is the creator of nixCraft and a seasoned sysadmin, DevOps engineer, and a trainer for the Linux operating system/Unix shell scripting. If your disk was initially formatted to NTFS on a PC (or HFS+ on a Mac), most likely you'll suffer limitations, for example, the data on your drive can't be read or written on one of your computers. Fortunately, there is a file system (actually two, I'll explain) that you can format your flash drive in order to be fully compatible with Mac and PC.
I'm having a hard time getting a 4TB external USB drive to work on both LINUX (Ubuntu 14.04) as well as on my Mac OSX. The problems seem to be with inconsistent ability to read/write the USB drive. In the end, I just erased the drive and formatted it to a so called 'FAT' (MS-DOS) format.
This seems to have 'fixed' my issue, in that I can now read/write with it on both LINUX and Max OSX, however it's gone from 4TB to 1.74 TB now. I am wondering why that is, and what can be done to remedy it? Ultimately however, I would like the drive to be able to be used on both LINUX and Max OSX. EDIT: In the comments, the suggestions thus far say that I should try to format to exfat, or to GPT.
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However, as seen from this screen shot of gparted, I do not have the GPT option, and the exfat option seems to be greyed out. Not sure how to proceed. Exfat Your exfat option is almost certainly grayed out because you don't have the required packages installed to use exfat: apt-get update && apt-get install exfat-utils exfat-fuse Then check your disk tool again and you should see the option active. Using fat on a 4 tB disk results in massive sectors, and a huge waste of space, particularly for smaller files, plus as you discovered, it only sees part of the disk space.
Using mbr apparently restricts you to 2 tB disk size. As a rough rule of thumb, I'd say maybe a usb drive = 2.24.0), libc6 (>= 2.4), libgcc1 (>= 1:4.2), libglib2.0-0 (>= 2.16.0), libglibmm-2.4-1v5 (>= 2.50.0), libgtk2.0-0 (>= 2.14.0), libgtkmm-2.4-1v5 (>= 1:2.24.0), libpangomm-1.4-1v5 (>= 2.40.0), libparted-fs-resize0 (>= 3.1), libparted2 (>= 3.1), libsigc++-2.0-0v5 (>= 2.8.0), libstdc++6 (>= 5.2), libuuid1 (>= 2.16) Suggests: xfsprogs, reiserfsprogs, reiser4progs, jfsutils, ntfs-3g, dosfstools, mtools, yelp, kpartx, dmraid, dmsetup, gpart. So here you'd want to ensure that gpart as well as gdisk is installed, for example, but note, if I remember gparted right, you won't see gpt as an option if the disk has already been set to use mbr type, you have to go in an redo it totally. Assuming this is correct re mbr vs gpt size limits (I've never run > 1 tB disks personally so I'm a touch behind on this) MBR does have its limitations. For starters, MBR only works with disks up to 2 TB in size. MBR also only supports up to four primary partitions—if you want more, you have to make one of your primary partitions an “extended partition” and create logical partitions inside it.
This is a silly little hack and shouldn’t be necessary. Conclusion: You have to fully redo the disk, set it to gpt, which this fairly good explanation walks you through. Note that I never used gparted to work with gpt, I always used gdisk because honestly I found it easier to do.
This one is also nicely explained: Again, it's recommended to use gdisk directly to do this. In general, it's far easier to just set the disk to gpt FIRST, then partition, then format to file system type (exfat maybe in your case), otherwise you have to undo stuff and redo it, which always entails some risk in terms of data loss.
- вторник 11 декабря