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intel disk system: restrict maximum supported size.

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* The MBR can only address 2^32 blocks.
* This prevents you from initializing a disk larger than 2TB with a block
  size of 512 bytes.
This commit is contained in:
Axel Dörfler
2013-01-24 00:44:26 +01:00
parent 61ba12594b
commit 2077b23f14
1 changed files with 4 additions and 2 deletions
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src/add-ons/disk_systems/intel/PartitionMapAddOn.cpp
+4 -2
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@@ -90,8 +90,10 @@ PartitionMapAddOn::CreatePartitionHandle(BMutablePartition* partition,
bool bool
PartitionMapAddOn::CanInitialize(const BMutablePartition* partition) PartitionMapAddOn::CanInitialize(const BMutablePartition* partition)
{ {
// If it's big enough, we can initialize it. // If it's big enough, but not too big (ie. larger than 2^32 blocks) we can
return partition->Size() >= 2 * partition->BlockSize(); // initialize it.
return partition->Size() >= 2 * partition->BlockSize()
&& partition->Size() / partition->BlockSize() < UINT32_MAX;
} }