c0xc
commented
10 months ago Quoting the example from the README file:
For example, a fake might be sold as "64 GB USB thumb drive" but it would only have a real capacity of 4 GB, everything beyond this limit will be lost.
So the problem that this program is supposed to solve is: You have bought a USB drive and before saving anything on it, you want to find out if it really has the capacity it claims to have. There is at least one other program on the market but it takes hours and days (plus it's Windows only) whereas CapacityTester has a quick disk test which only takes a couple of minutes. This type of test is not meant to detect bad blocks.
However, I have just released version 0.6 which allows you to run the disk test in "full mode", which means that it tests the full storage device, similar to what badblocks does. The disk test is destructive just like badblocks -w, except that it currently works in 1M chunks, so it wouldn't report the exact block number. Also, badblocks runs 3 or 4 times by default and the full disk test just goes over the disk once. So if you want to test an hdd that's not quite dead which has a block that sometimes returns corrupted data, such an option might be useful. But if you really have a bad block that's definitely dead, you could use the full disk test to find it (again, as of now, the position of the first error, rounded to 1 MB).
lexterror
Hi could you be more specific with the description. Thank you for the app. I want to know what you mean by fake? I know different brand flash drives are often "built" differently so the capacities differ. I want to use your app mainly for testing bad blocks as quickly as possible. Thank you!