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Re: How long will this take?



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-


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