![]() And in this volume we have two sectors per cluster. And then at 0D we have sectors per cluster. So let's take a look here and find out how many sectors per cluster we have on this volume. Once your volume opens we can see we are again in the volume boot record. So once you've located your fat volume go ahead and right click and open in disk editor. Now Mayan was drive letter A, yours might be different. So I'm going to click open disk and now I'm going to go to volumes. Remember we want that 100 megabyte fat 32 volume which should be the first volume on the virtual hard drive. Once active disk editor opens, we want to go ahead and select our volume. I'm just going to call it dark in child and I'm going to open it up and write some data on there and I'm going to save it and we're going to close it now once we've done that, I'm going to go ahead and minimize file Explorer and I'm going to open up active disk editor now. And in this folder I'm going to put another new text document. So new folder and I'm just going to call this folder inroot and these will have long file name entries as we can see. I'm also going to create another folder in this directory. Once you put some data on there, save the file you can close it. I'm going to use a text document and I'm just going to call this file in root and now I'm going to open the file and write some data on it. So new folder, we're going to call this new folder root, and I'm doing this because we're putting it in the root of the volume in the root folder. We're going to create a folder on the volume. I want you to open up the volume in Windows Explorer. Note the dis number in the drive letter for that fat 32100 megabit volume. That should be the first volume on your disk. We're going to be using the fat 32100 megabyte volume. You're going to select it and then we're going to click open, once RVHD attach is for this walkthrough. So we're going to bring up dis management, we're going to go to actions, attach a VHD, you're going to navigate out to where the VHD is saved on your drive. ![]() The first thing we need to do is we have to go attach RVHD. We're going to need our Windows Explorer and we're going to need active disk editor. We're actually going to recover some files from our NPR Bhd. And the other issue we come across is if the data has been overridden out on the disk. That will make it very difficult to recover the file. Another issue is if the directory entry was reused or overwritten and we don't have that short file in that directory entry to find our starting cluster and file size. Well if we have fragmented files it's going to be harder to recover them because if they are not contiguous it's going to be very hard to tell where that file was in the fat table. ![]() That's how we're going to determine how many clusters we need and once we determine that we can reach ain't our entries in the fat table and then we will have successfully recovered our file some issues with fat file recovery. Once we find out how many clusters we need for our file we will divide the file size by the cluster sides and round up. Then we will calculate the number of clusters needed. So we will determine the cluster size from the volume boot record. And we'll know if we need to put an end of file marker there or if the file takes up more than one cluster we would need to put a pointer to that next cluster. We need to change to indicate that it's allocated. We will be able to get the starting cluster and the file size so we'll know which file injury and the fat table. The next thing we need to do is we name to change the values in the fat table to indicate that the clusters are allocated from the short file name entry. If it only has a short file name entry, we will change that back to another character. If we know the first letter of the file, if the file has a long file name you can get the first letter from that. The first step recovering a file and the fat file system is we need to change the first bite in the directory sets from A Hexi five to a different character. We're going to talk about the steps to recover a file in the fat file system. In this course we're covering the fat file system, in this module we're going to look at fat file recovery.
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