Re: "Invalid arch-independent ELF magic" in grub after SSD migration

From	Stefan Monnier <monnier@iro.umontreal.ca>
Newsgroups	linux.debian.user
Subject	Re: "Invalid arch-independent ELF magic" in grub after SSD migration
Date	2017-02-23 16:40 +0100
Message-ID	<te3ES-38C-13@gated-at.bofh.it> (permalink)
References	<tdAtc-7g0-15@gated-at.bofh.it> <te2z7-2s9-9@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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> using something like rsync, which means no duplicate UUIDs, you aren't
> spending time copying sectors that aren't referenced, the SSD gets
> fewer write cycles and it can be interrupted and resumed.

FWIW, copying files has its own form of overhead, so if the drive is
reasonably filled, it'll be faster to do a `dd` than an `rsync` (because
that uses the optimal (sequential) access) and it might very well result
in fewer writes for the flash memory of your SSD.

Anyway, another advantage of `rsync` is that it works even if the
file-system is currently mounted and accessed.  E.g. I've cloned running
Debian systems with `rsync` with no problem, whereas doing it with `dd`
invariably leads to corrupted partitions.

> Or pvmove in some cases.

Personally I very rarely copy whole drives, but I do copy partitions
with `dd` sometimes (especially partitions with many small files where
`rsync` slows down noticeably).
Tho if I can use pvmove, that's a better option.


        Stefan

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"Invalid arch-independent ELF magic" in grub after SSD migration Lucio Crusca <lucio@sulweb.org> - 2017-02-22 09:30 +0100
  Re: "Invalid arch-independent ELF magic" in grub after SSD migration Lucio Crusca <lucio@sulweb.org> - 2017-02-22 14:30 +0100
    Re: "Invalid arch-independent ELF magic" in grub after SSD migration Eero Volotinen <eero.volotinen@iki.fi> - 2017-02-22 15:50 +0100
      Re: "Invalid arch-independent ELF magic" in grub after SSD migration Lucio Crusca <lucio@sulweb.org> - 2017-02-22 16:40 +0100
        Re: "Invalid arch-independent ELF magic" in grub after SSD migration Mark Fletcher <mark27q1@gmail.com> - 2017-02-23 00:00 +0100
          Re: "Invalid arch-independent ELF magic" in grub after SSD migration <tomas@tuxteam.de> - 2017-02-23 11:30 +0100
            Re: "Invalid arch-independent ELF magic" in grub after SSD migrationy Mark Fletcher <mark27q1@gmail.com> - 2017-02-23 12:20 +0100
  Re: "Invalid arch-independent ELF magic" in grub after SSD migration Tixy <tixy@yxit.co.uk> - 2017-02-22 17:50 +0100
    Re: "Invalid arch-independent ELF magic" in grub after SSD migration Lucio Crusca <lucio@sulweb.org> - 2017-02-22 19:00 +0100
      Re: "Invalid arch-independent ELF magic" in grub after SSD migration Tixy <tixy@yxit.co.uk> - 2017-02-22 21:20 +0100
        Re: "Invalid arch-independent ELF magic" in grub after SSD migration Lucio Crusca <lucio@sulweb.org> - 2017-02-22 21:50 +0100
          Re: "Invalid arch-independent ELF magic" in grub after SSD migration Lucio Crusca <lucio@sulweb.org> - 2017-02-23 00:30 +0100
  Re: "Invalid arch-independent ELF magic" in grub after SSD migration Richard Hector <richard@walnut.gen.nz> - 2017-02-23 11:10 +0100
  Re: "Invalid arch-independent ELF magic" in grub after SSD migration Stefan Monnier <monnier@iro.umontreal.ca> - 2017-02-23 15:10 +0100
  Re: "Invalid arch-independent ELF magic" in grub after SSD migration Jonathan Dowland <jmtd@debian.org> - 2017-02-23 15:30 +0100
    Re: "Invalid arch-independent ELF magic" in grub after SSD migration <tomas@tuxteam.de> - 2017-02-23 16:10 +0100
      Re: "Invalid arch-independent ELF magic" in grub after SSD migration Stefan Monnier <monnier@iro.umontreal.ca> - 2017-02-23 16:50 +0100
        Re: "Invalid arch-independent ELF magic" in grub after SSD migration <tomas@tuxteam.de> - 2017-02-24 10:50 +0100
          Re: "Invalid arch-independent ELF magic" in grub after SSD migration "Thomas Schmitt" <scdbackup@gmx.net> - 2017-02-24 11:50 +0100
            Re: "Invalid arch-independent ELF magic" in grub after SSD migration <tomas@tuxteam.de> - 2017-02-24 12:30 +0100
              Re: "Invalid arch-independent ELF magic" in grub after SSD migration deloptes <deloptes@gmail.com> - 2017-02-24 17:10 +0100
                Re: "Invalid arch-independent ELF magic" in grub after SSD migration Lucio Crusca <lucio@sulweb.org> - 2017-02-25 10:20 +0100
                Re: "Invalid arch-independent ELF magic" in grub after SSD migration Felix Miata <mrmazda@earthlink.net> - 2017-02-25 10:30 +0100
                Re: "Invalid arch-independent ELF magic" in grub after SSD migration <tomas@tuxteam.de> - 2017-02-25 10:40 +0100
                Re: "Invalid arch-independent ELF magic" in grub after SSD migration Lucio Crusca <lucio@sulweb.org> - 2017-02-25 11:30 +0100
                Re: "Invalid arch-independent ELF magic" in grub after SSD migration <tomas@tuxteam.de> - 2017-02-25 10:40 +0100
                Re: "Invalid arch-independent ELF magic" in grub after SSD migration "Thomas Schmitt" <scdbackup@gmx.net> - 2017-02-25 11:30 +0100
                Re: "Invalid arch-independent ELF magic" in grub after SSD migration deloptes <deloptes@gmail.com> - 2017-02-25 14:40 +0100
    Re: "Invalid arch-independent ELF magic" in grub after SSD migration Stefan Monnier <monnier@iro.umontreal.ca> - 2017-02-23 16:40 +0100

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