![]() ![]() Writing these file systems to the drive will result in If anything was written to the drive after deletion (including a new file system), the software will be making numerous assumptions to come up with the candidate. It should pretty much only ever be done with a clone, if not avoided entirely. There are very few cases where this is even somewhat safe to do on the patient. In certain cases, the correct candidate file system can be written back to the drive to allow access to the data again. These suggested file systems are referred to as “candidate file systems”. Most data recovery software will start out by attempting to re-construct the original definition based on these traces (using assumptions as well as user input). So when you delete a volume / partition from a storage device, traces of its existence and metadata usually still exist on the drive. Whether the issue is recovering a formatted Bitlocker volume or recovering another volume that has been replaced by a Bitlocker volume are entirely different hurdles as well. Virtually with data recovery software like UFS Explorer (arguably the gold standard of data recovery tools) or M3 Data Recovery (which is not a great tool in any other case) orīy re-inserting the volume on a copy of the clone (and if necessary, using something like repair-bde on a copy of it) to make the volume available to decryption by the Bitlocker serviceīitlocker has had so many tweaks and revisions since it was first released, and can still be deployed on a system in a number different ways that all have different challenges, so knowing how it was implemented would be important from a recovery standpoint. If this is what you meant, they likely cloned the drive and then recovered / repaired the Bitlocker volume, either Or the alternative interpretation of the problem, someone formatted over an existing Bitlocker volume and the specialist was able to recover it using the key. ![]() In either case some data has been overwritten. The original volume was still deleted, so they’ll need to use data recovery software to interpret what’s left. If this wasn’t enabled, they can make an image of the drive after decrypting it to return the sectors to their values before the space was encrypted, allowing access to the data that wasn’t overwritten. If UDSO is enabled, all of the unallocated space on the drive that contains data from the old volume potentially contains recoverable data (so long as it hasn’t been overwritten). Depending on the amount of data on the drive, this option can reduce the initial encryption time by more than 99 percent. Any new data is encrypted as it's created. Areas of the disk that don't contain data and are empty won't be encrypted. To reduce encryption time, BitLocker in Windows 11 and Windows 10 let users choose to encrypt just the areas of the disk that contain data. If a drive previously had confidential data that has been moved or deleted, traces of the confidential data could remain on portions of the drive marked as unused. Full disk encryption is still the most secure way to encrypt a drive, especially if a drive has previously contained confidential data that has since been moved or deleted. Encrypting every byte on the volume including areas that didn't have data is known as full disk encryption. What exactly do you mean? Someone deleted a volume and created an encrypted Bitlocker volume in its place? If that’s the case, they likely did one of two things depending on the drive’s use of the Used Disk Space Only (UDSO) encryption setting:īitLocker in earlier Windows versions could take a long time to encrypt a drive because it encrypted every byte on the volume including areas that didn't have data.
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