this post was submitted on 21 May 2024
358 points (96.4% liked)
Technology
59287 readers
5759 users here now
This is a most excellent place for technology news and articles.
Our Rules
- Follow the lemmy.world rules.
- Only tech related content.
- Be excellent to each another!
- Mod approved content bots can post up to 10 articles per day.
- Threads asking for personal tech support may be deleted.
- Politics threads may be removed.
- No memes allowed as posts, OK to post as comments.
- Only approved bots from the list below, to ask if your bot can be added please contact us.
- Check for duplicates before posting, duplicates may be removed
Approved Bots
founded 1 year ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
Anyone with a background in computing would respond, "duh." The operating system maintains a file table which contains the addresses of pieces of data on the disk. Deleting a file just removed its file table entry, and in most cases leaves the data untouched. That's why data recovery software exists, and it's also how we have the "Trash" or "Recycle Bin". If you want the photos completely erased, you'll need to overwrite the data, which wastes time and write cycles...
You're mixing up two things. In Trash, neither the pointers to the data, nor the actual data is deleted, they're just marked as deleted by moving them to a folder called Trash, or appending .trashed to their file name, which the file management part of the OS treats as trashed. If you clear your Trash, or directly delete the file permanently, the pointers are deleted so any data on the disk is marked as free to be overwritten, but until something actually overwrites it, you can recover it using data recovery software. If you change all the physical bits on the disk then the data is permanently deleted and can't be recovered. Unless, of course, it was copied to someone else's server first.
You're right, except that this is about years-old deleted pics. Like deleted-in-2021 old. The blocks on the partition have long since been overwritten.