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PostPosted: Sat Jan 12, 2013 12:46 am 
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Silly question, but just how big was the original disk? Was it really 4TB or more?


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PostPosted: Sat Jan 12, 2013 7:51 am 
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Hi

yes, true!, i have posted something on a linux forum... it is still "on going"
...

juliette


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PostPosted: Sat Jan 12, 2013 3:36 pm 
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Be Aware that large disks (over 2TB) usually require an EFI Partition
(Guid Partition Scheme) in order to be properly recognized (by the firmware)
on an Intel Mac machine. Most linux distros recognize GUID Partition Arrangements.

One software that is capable of making the GUID modification without reformatting
your drive is iPartition. **

One partition may need to be resized in order to fit (insert)
a new (200 MB) EFI partition. †

http://www.coriolis-systems.com/iPartition.php


** iPartition only converts partition maps, not filesystems.
† supported PC filesystems: FAT16, FAT32, NTFS. Other partitions can be manipulated,
but resizing without use of third-party filesystem resizing tool will destroy data.

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"You know, you can't tell which way the train went by looking at the tracks."


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PostPosted: Sun Jan 13, 2013 1:30 am 
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That partition map just makes no sense to me. It seems to indicate the disk is 2.0TB in size, then proceeds to define 4TB of space. I'm pretty sure it's a GPT partition map due to the first partition being type 5, but the map only defines a disk 2.0TB in size.

VirtualBox, or (more likely) the virtualized SATA adapter inside it, may not support disks over 2TB in size. Perhaps if you chose another type of virtualized adapter it would support the disk, assuming they have another virtualized adapter that supports single disks over 2TB.


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PostPosted: Sun Jan 13, 2013 10:21 am 
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On the 2 TB thing, would there be a difference in 32bit/64bit Linux?


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PostPosted: Sun Jan 13, 2013 10:41 pm 
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There is a 2TB limit if a PATA/SATA controller uses a 32bit value for number of sectors. After the 128GB limit (in 2001) PATA moved to 48bit addressing, but BIOS and controllers sometimes used 32bit values for simplicity. I wonder if the emulated BIOS and/or SATA controller is one of these.


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PostPosted: Sun Jan 13, 2013 11:21 pm 
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MonkeyBoy wrote:
That partition map just makes no sense to me. It seems to indicate the disk is 2.0TB in size, then proceeds to define 4TB of space.

I don't think it does. The disk1 device is shown as a 2TB drive, then the partitions are broken out as one with 2TB (presumably rounded) for disk1s2, and an inconsequential handful of MBs for the others. Run diskutil list on one of your own drives to observe a similar effect.

- Anonymous


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PostPosted: Mon Jan 14, 2013 10:26 am 
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Oh crud. I read the 800MB-something partitions as 800GB partitions.

So, yeah, nevermind. My hours were changed at work last week and I'm still not sleeping well... a foggy head is only occasionally useful.

Sorry about that...


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