Checking the information
Checking the information
I have begun using an external hard drive recently (a Seagate 1TB expansion HDD) that I haven’t accessed much in the past three years—typically only once every six months to add about 20GB of files, and just recently copied around 200GB. I’ve noticed some files on the drive are now missing, so I’m wondering if there’s a way to confirm whether everything remains intact over the last year or if data has been lost. My concerns include potential issues like a failing magnetic field, damaged cable, copying errors, or general hardware faults. I ran several diagnostic tools: Short DST, Short Generic, Smart, Identify, and Long Generic all passed. The Chkdsk scan with “Scan and recover bad sectors” worked too, and the Dell support app tests also completed successfully. Crystal Disk Info reports the drive is healthy. While these checks seem thorough, I’m unsure if they fully guarantee data integrity. Would you suggest additional tests to ensure everything is correct and safe before considering recovery? Thanks in advance.
I received a thorough and comprehensive reply from GoodBytes in the message you sent. The post is now available for anyone seeking similar information later on.
Files are typically checked by generating an MD5 or similar hash. This process needs planning ahead. With the hashes already stored, you can build a program that compares the current file's hash to the stored one. If the file changes, the hash must be updated as well. Otherwise, manual verification becomes necessary without a reliable reference.