Fw: How long will this take?

From	Matthew Campbell <trenix25@pm.me>
Newsgroups	linux.debian.user
Subject	Fw: How long will this take?
Date	2020-06-10 19:20 +0200
Message-ID	<Agcyl-XY-9@gated-at.bofh.it> (permalink)
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I ran a read test first to look for bad sectors on the new hard drive to see if it was damaged by the shipping process. Now I am writing to each sector, after looking around on the drive to inspect any data written by the manufacturer, to clear everything for the aforementioned reasons. Two files had been placed on the second partition by the manufacturer. The first partition did not have a file system. The manufacturer really screwed up the partitioning process. They started the first partition inside a physical 4096 byte sector. fdisk pointed this out in red text. The drive uses a logical sector size of 512 bytes, but uses a physical sector size of 4096 bytes. I still don't know the rest of the disk geometry.

name=Matthew%20Campbell&email=trenix25%40pm.me

-------- Original Message --------
On Jun 10, 2020, 10:02 AM, David Wright wrote:

> On Wed 10 Jun 2020 at 10:14:02 (-0400), Michael Stone wrote:
>> On Mon, Jun 08, 2020 at 10:01:13PM -0500, David Wright wrote:
>> > On Mon 08 Jun 2020 at 20:22:39 (+0000), 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 recently ran
>> >
>> > # badblocks -c 1024 -s -w -t random -v /dev/sdz
>> >
>> > on a 2TB disk with a USB2 connection. The whole process, writing and
>> > checking, took 33⅓ hours. (The disk now holds an encrypted ext4 filesystem.)
>>
>> Yes, it's a slower process than just writing zeros. A modern drive
>> will verify writes as they're made. badblocks is basically a relic of
>> another age primarily intended to give a list of bad sectors to avoid
>> when making a filesystem. Once upon a time, hard drives actually had a
>> handwritten label on the top listing any bad sectors identified at the
>> factory so you could avoid them. They don't have that anymore. If any
>> modern hard drive has consistent bad (not remappable) sectors it
>> should just be thrown away, because that means it is so far gone that
>> it no longer has the ability to internally map bad sectors to reserved
>> good 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.
>>
>> > I'm not sure why you'd do that. I've only zeroed disks to erase them
>> > before I return them to the owner. (They're inside loaned computers.)
>>
>> Because it accomplishes what your badblocks run does, in less than
>> half the time. :)
>
> I tried to make clear that my use case differed from that of the OP,
> in case you missed that. Just before lockdown (=lockout). I borrowed
> an AIO computer and, to make room, returned a 2006 vintage tower that
> would no longer pass its POST. I used /dev/zero to erase all the
> information from the disk as there was little point in trying to put
> Windows XP (licensed to a dead computer) back onto it. Quick, easy,
> and quick to check with od. Both l0f4r0 and I have asked why the OP
> is zeroing the drive, but no reply yet. Perhaps you can suggest an
> answer.
>
> My use case for badblocks was closer to that of the OP, but still
> different. Firstly, the disk contained personal data from unencrypted
> use in the past. Secondly, I was intending to use it encrypted (as
> mentioned) and prefer no high-watermark. Thirdly, because of its
> age (2011), I was interested in seeing how well it performed. I have
> no idea whether the disk is "modern" in the sense you used, as I don't
> follow the technology like some people on this list evidently do.
> Fourthly, I don't make a habit of throwing away 2TB disks.
>
> But, as you know about these things, a few questions:
>
> . How does badblocks do its job in readonly mode, given that it
> doesn't know what any block's content ought to be.
>
> . Why might the OP run badblocks, particularly non-destructively
> (as if to preserve something), and *then* zero the drive.
>
> . What's the easiest way of finding out about "consistent bad
> (not remappable) sectors" on a drive, as I soon will have to
> repeat this result (if not by this exact process) with a 3TB
> disk of 2013 vintage. (The good news: it has a USB3 connection.)
>
> Cheers,
> David.

Thread

How long will this take? Matthew Campbell <trenix25@pm.me> - 2020-06-08 22:30 +0200
  Re: How long will this take? Dan Ritter <dsr@randomstring.org> - 2020-06-08 22:40 +0200
    Re: How long will this take? deloptes <deloptes@gmail.com> - 2020-06-08 23:00 +0200
      Re: How long will this take? Dan Ritter <dsr@randomstring.org> - 2020-06-09 00:10 +0200
        Re: How long will this take? Michael Stone <mstone@debian.org> - 2020-06-10 16:10 +0200
          Re: How long will this take? Michael Stone <mstone@debian.org> - 2020-06-10 17:00 +0200
          Re: How long will this take? Andrei POPESCU <andreimpopescu@gmail.com> - 2020-06-10 17:00 +0200
          Re: How long will this take? David Christensen <dpchrist@holgerdanske.com> - 2020-06-11 02:40 +0200
    Re: How long will this take? Jude DaShiell <jdashiel@panix.com> - 2020-06-09 02:20 +0200
      Re: How long will this take? Andrei POPESCU <andreimpopescu@gmail.com> - 2020-06-09 09:40 +0200
  Re: How long will this take? Nicolas George <george@nsup.org> - 2020-06-08 22:40 +0200
    Re: How long will this take? Matthew Campbell <trenix25@pm.me> - 2020-06-08 23:10 +0200
      Re: How long will this take? Nicolas George <george@nsup.org> - 2020-06-08 23:20 +0200
  Re: How long will this take? David Wright <deblis@lionunicorn.co.uk> - 2020-06-09 05:10 +0200
    Re: How long will this take? Christopher David Howie <me@chrishowie.com> - 2020-06-09 06:00 +0200
      Re: How long will this take? Nicolas George <george@nsup.org> - 2020-06-09 11:50 +0200
        Fw: How long will this take? Matthew Campbell <trenix25@pm.me> - 2020-06-09 17:40 +0200
        Re: How long will this take? Christopher David Howie <me@chrishowie.com> - 2020-06-10 02:50 +0200
    Re: How long will this take? Michael Stone <mstone@debian.org> - 2020-06-10 16:20 +0200
      Re: How long will this take? David Wright <deblis@lionunicorn.co.uk> - 2020-06-10 19:10 +0200
        Fw: How long will this take? Matthew Campbell <trenix25@pm.me> - 2020-06-10 19:20 +0200
          Re: Fw: How long will this take? David Christensen <dpchrist@holgerdanske.com> - 2020-06-11 03:10 +0200
            Fw: Fw: How long will this take? Matthew Campbell <trenix25@pm.me> - 2020-06-11 20:00 +0200
              Re: Fw: Fw: How long will this take? Dan Ritter <dsr@randomstring.org> - 2020-06-11 20:10 +0200
                Re: Fw: Fw: How long will this take? Kenneth Parker <sea7kenp@gmail.com> - 2020-06-11 22:20 +0200
                Re: Fw: Fw: How long will this take? "Rick Thomas" <rick.thomas@pobox.com> - 2020-06-13 11:20 +0200
        Re: How long will this take? Michael Stone <mstone@debian.org> - 2020-06-10 21:00 +0200
          [OT] How to help the OP? (was: How long will this take?) l0f4r0@tuta.io - 2020-06-10 21:30 +0200
            Re: [OT] How to help the OP? (was: How long will this take?) Nicolas George <george@nsup.org> - 2020-06-10 21:30 +0200
              Re: [OT] How to help the OP? (was: How long will this take?) Nicolas George <george@nsup.org> - 2020-06-10 22:00 +0200
                Re: [OT] How to help the OP? (was: How long will this take?) Michael Stone <mstone@debian.org> - 2020-06-10 22:00 +0200
                Re: [OT] How to help the OP? (was: How long will this take?) Nicolas George <george@nsup.org> - 2020-06-10 22:30 +0200
                Re: [OT] How to help the OP? (was: How long will this take?) deloptes <deloptes@gmail.com> - 2020-06-11 07:30 +0200
                Re: [OT] How to help the OP? (was: How long will this take?) <tomas@tuxteam.de> - 2020-06-11 07:50 +0200
                Re: [OT] How to help the OP? (was: How long will this take?) deloptes <deloptes@gmail.com> - 2020-06-11 11:00 +0200
                Re: [OT] How to help the OP? (was: How long will this take?) <tomas@tuxteam.de> - 2020-06-11 11:40 +0200
                Re: [OT] How to help the OP? (was: How long will this take?) Michael Stone <mstone@debian.org> - 2020-06-11 14:00 +0200
                Re: [OT] How to help the OP? (was: How long will this take?) Nicolas George <george@nsup.org> - 2020-06-11 14:10 +0200
              Re: [OT] How to help the OP? (was: How long will this take?) Michael Stone <mstone@debian.org> - 2020-06-10 22:00 +0200
            Re: [OT] How to help the OP? (was: How long will this take?) Michael Stone <mstone@debian.org> - 2020-06-10 21:50 +0200
              Re: [OT] How to help the OP? (was: How long will this take?) David Wright <deblis@lionunicorn.co.uk> - 2020-06-12 04:00 +0200
          Re: How long will this take? David Wright <deblis@lionunicorn.co.uk> - 2020-06-12 04:00 +0200
            Re: How long will this take? Michael Stone <mstone@debian.org> - 2020-06-12 14:00 +0200
              Re: How long will this take? David Wright <deblis@lionunicorn.co.uk> - 2020-06-19 04:20 +0200
                Re: How long will this take? David Christensen <dpchrist@holgerdanske.com> - 2020-06-20 00:00 +0200
                Re: How long will this take? David Wright <deblis@lionunicorn.co.uk> - 2020-06-26 15:10 +0200
                Re: How long will this take? David Christensen <dpchrist@holgerdanske.com> - 2020-06-27 00:10 +0200
                Re: How long will this take? David Wright <deblis@lionunicorn.co.uk> - 2020-06-27 03:30 +0200
                Re: How long will this take? David Christensen <dpchrist@holgerdanske.com> - 2020-06-27 05:00 +0200
                Re: How long will this take? David Wright <deblis@lionunicorn.co.uk> - 2020-07-02 03:10 +0200
  Re: How long will this take? David Christensen <dpchrist@holgerdanske.com> - 2020-06-09 09:10 +0200
  Re: How long will this take? l0f4r0@tuta.io - 2020-06-09 20:10 +0200
    Re: How long will this take? Nicolas George <george@nsup.org> - 2020-06-09 20:30 +0200
      Re: How long will this take? Jude DaShiell <jdashiel@panix.com> - 2020-06-09 21:50 +0200
        Re: How long will this take? Nicolas George <george@nsup.org> - 2020-06-09 21:50 +0200
      Re: How long will this take? Anders Andersson <pipatron@gmail.com> - 2020-06-10 12:50 +0200
        Re: How long will this take? Nicolas George <george@nsup.org> - 2020-06-10 13:20 +0200
          Re: How long will this take? Anders Andersson <pipatron@gmail.com> - 2020-06-10 15:30 +0200
            Re: How long will this take? Nicolas George <george@nsup.org> - 2020-06-10 15:40 +0200
              Re: How long will this take? Anders Andersson <pipatron@gmail.com> - 2020-06-10 16:00 +0200
                Re: How long will this take? Nicolas George <george@nsup.org> - 2020-06-10 16:10 +0200
                Re: How long will this take? Anders Andersson <pipatron@gmail.com> - 2020-06-10 22:10 +0200
                Fw: How long will this take? Matthew Campbell <trenix25@pm.me> - 2020-06-10 19:00 +0200
    Re: How long will this take? Jude DaShiell <jdashiel@panix.com> - 2020-06-09 20:30 +0200
  Re: How long will this take? Seeds Notoneofmy <notoneofmyseeds@gmx.de> - 2020-06-27 01:40 +0200
    Re: How long will this take? rhkramer@gmail.com - 2020-06-27 03:30 +0200
      Re: How long will this take? Seeds Notoneofmy <notoneofmyseeds@gmx.de> - 2020-06-27 03:50 +0200
        Re: How long will this take? rhkramer@gmail.com - 2020-06-27 20:10 +0200
    Re: How long will this take? Andrei POPESCU <andreimpopescu@gmail.com> - 2020-06-27 10:40 +0200
    On Subject drift [was: How long will this take?] <tomas@tuxteam.de> - 2020-06-27 11:00 +0200
      Re: On Subject drift [was: How long will this take?] l0f4r0@tuta.io - 2020-06-27 11:40 +0200
      Re: On Subject drift [was: How long will this take?] Seeds Notoneofmy <notoneofmyseeds@gmx.de> - 2020-06-27 16:40 +0200
        Re: On Subject drift [was: How long will this take?] <tomas@tuxteam.de> - 2020-06-27 18:50 +0200

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