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Fix cluster start calculation for FAT32.

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This commit is contained in:
Natalia Portillo
2019-04-28 17:44:47 +01:00
parent 7b3d5d3f11
commit baf6f46eb2
4 changed files with 11 additions and 18 deletions
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8
DiscImageChef.Filesystems/FAT/Super.cs
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@@ -192,9 +192,8 @@ namespace DiscImageChef.Filesystems.FAT
// First root directory sector
firstClusterSector =
(ulong)((fat32Bpb.root_cluster - 2) * fat32Bpb.spc + fat32Bpb.big_spfat * fat32Bpb.fats_no +
fat32Bpb.rsectors) * sectorsPerRealSector;
sectorsForRootDirectory = 1;
(ulong)(fat32Bpb.big_spfat * fat32Bpb.fats_no + fat32Bpb.rsectors) * sectorsPerRealSector -
2 * sectorsPerCluster;
if(fat32Bpb.fsinfo_sector + partition.Start <= partition.End)
{
@@ -396,8 +395,7 @@ namespace DiscImageChef.Filesystems.FAT
foreach(uint cluster in rootDirectoryClusters)
{
byte[] buffer =
imagePlugin.ReadSectors(firstClusterSector + (cluster - 2) * sectorsPerCluster,
sectorsPerCluster);
imagePlugin.ReadSectors(firstClusterSector + cluster * sectorsPerCluster, sectorsPerCluster);
rootMs.Write(buffer, 0, buffer.Length);
}