Matthew Campbell wrote: > I bought a new 4 terrabyte hard drive that is connected with a USB cable > using USB2. It took about 32 hours to read every sector on the drive to look > for bad sectors. I started blanking the sectors using /dev/zero last Friday > night. It still isn't done. Is there a way I can find out how much data a > particular process has written to the disk? I'm using Debian 10.4. > > dd if=/dev/zero of=/dev/sdb ibs=4096 count=976754646
USB2 disks are good for about 25MB/s. 4 seconds gets you 100MB. 40 seconds gets you 1000MB. 4000 * 40 seconds is 160000 seconds, so that's not quite two days. Is something wrong? Based on current news reports, I would say you accidentally purchased an SMR disk. (By accidentally, I mean that the box didn't say, the ad didn't say, and the manufacturer might even have lied to you for a while.) https://www.ixsystems.com/community/resources/list-of-known-smr-drives.141/ Is it one of those? If so, return it. Tell the store that it's an unlabelled SMR drive. They'll take it back. -dsr-
