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Groups > linux.debian.user > #230074
| From | Andy Smith <andy@strugglers.net> |
|---|---|
| Newsgroups | linux.debian.user |
| Subject | Re: mdadm usage |
| Date | 2020-12-29 14:20 +0100 |
| Message-ID | <Brn4R-5sL-3@gated-at.bofh.it> (permalink) |
| References | <BrhiN-1Nn-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
Hello, On Tue, Dec 29, 2020 at 07:58:50AM +0100, Thomas A. Anderson wrote: > I have been "using" mdadm to run software raid1 (stripping) on a file > server i have been running. As others have noted, RAID-1 is not striping but mirroring. I'll assume you have used RAID-1. Showing us the content of your /proc/mdstat file would help. > now that I try to access data on these two original drives on > another system, I am unable to. The default metadata format (v1.2) for mdadm is at the beginning of the device. If you've put a filesystem directly on the md device then the presence of the metadata will prevent it being recognised as a simple filesystem. What you can do is force mdadm to import it as a degraded RAID-1. Back in the days before GRUB understood md RAID-1 people used to have to specifically use metadata format v1.0 or v0.9 for the device containing /boot, in order to get metadata placed at end of device so that GRUB was tricked into thinking it was a simple filesystem. If you need help importing your single RAID-1 device, get it plugged in to a system and recognised as a block device (see /proc/partitions for a list of block devices), then show us the output of: # mdadm --examine /dev/whatever where /dev/whatever is the block device for this single RAID-1 member device. Then we'll help you get mdadm to assemble it. Alternatively, assuming filesystem directly on md device it is also possible to use the loop driver to create a new device that is an offset into the md member device and then mount that as the filesystem, but in my opinion that is more complicated and dangerous than just getting mdadm to assemble a degraded RAID-1. Cheers, Andy -- https://bitfolk.com/ -- No-nonsense VPS hosting
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mdadm usage "Thomas A. Anderson" <thomas.anderson@little-beak.com> - 2020-12-29 08:10 +0100
Re: mdadm usage Reco <recoverym4n@enotuniq.net> - 2020-12-29 08:30 +0100
Re: mdadm usage deloptes <deloptes@gmail.com> - 2020-12-29 09:40 +0100
Re: mdadm usage Felix Miata <mrmazda@earthlink.net> - 2020-12-29 08:50 +0100
Re: mdadm usage basti <mailinglist@unix-solution.de> - 2020-12-29 09:40 +0100
Re: mdadm usage "Thomas A. Anderson" <thomas.anderson@little-beak.com> - 2020-12-29 21:40 +0100
Re: mdadm usage Linux-Fan <Ma_Sys.ma@web.de> - 2020-12-30 00:00 +0100
Re: mdadm usage deloptes <deloptes@gmail.com> - 2020-12-30 02:00 +0100
Re: mdadm usage Michael Stone <mstone@debian.org> - 2020-12-30 02:30 +0100
Re: mdadm usage deloptes <deloptes@gmail.com> - 2020-12-30 09:20 +0100
Re: mdadm usage Jesper Dybdal <jd-debian-user@dybdal.dk> - 2020-12-30 14:40 +0100
Re: mdadm usage Andy Smith <andy@strugglers.net> - 2020-12-30 15:00 +0100
Re: mdadm usage Jesper Dybdal <jd-debian-user@dybdal.dk> - 2021-01-02 14:40 +0100
mdadm usage Nicholas Geovanis <nickgeovanis@gmail.com> - 2020-12-30 15:10 +0100
Re: mdadm usage Nicholas Geovanis <nickgeovanis@gmail.com> - 2020-12-30 15:10 +0100
Re: mdadm usage deloptes <deloptes@gmail.com> - 2020-12-30 21:50 +0100
Re: mdadm usage Michael Stone <mstone@debian.org> - 2020-12-30 22:40 +0100
Re: mdadm usage deloptes <deloptes@gmail.com> - 2020-12-30 23:20 +0100
Re: mdadm usage Andy Smith <andy@strugglers.net> - 2020-12-31 00:30 +0100
Re: mdadm usage rhkramer@gmail.com - 2020-12-31 13:30 +0100
Re: mdadm usage Michael Stone <mstone@debian.org> - 2020-12-31 15:20 +0100
Re: mdadm usage Andy Smith <andy@strugglers.net> - 2020-12-31 15:30 +0100
Re: mdadm usage Reco <recoverym4n@enotuniq.net> - 2020-12-31 15:50 +0100
Re: mdadm usage Andy Smith <andy@strugglers.net> - 2020-12-31 16:10 +0100
Re: mdadm usage Reco <recoverym4n@enotuniq.net> - 2020-12-31 16:20 +0100
Re: mdadm usage Andy Smith <andy@strugglers.net> - 2020-12-31 16:40 +0100
Re: mdadm usage deloptes <deloptes@gmail.com> - 2021-01-01 23:10 +0100
Re: mdadm usage Andrei POPESCU <andreimpopescu@gmail.com> - 2021-01-02 09:40 +0100
Re: mdadm usage deloptes <deloptes@gmail.com> - 2021-01-02 10:10 +0100
Re: mdadm usage Andrei POPESCU <andreimpopescu@gmail.com> - 2021-01-02 11:30 +0100
Re: mdadm usage Linux-Fan <Ma_Sys.ma@web.de> - 2021-01-02 14:50 +0100
Re: mdadm usage deloptes <deloptes@gmail.com> - 2021-01-02 16:40 +0100
Re: mdadm usage Linux-Fan <Ma_Sys.ma@web.de> - 2021-01-02 18:10 +0100
Re: mdadm usage The Wanderer <wanderer@fastmail.fm> - 2021-01-02 10:40 +0100
Re: mdadm usage Andrei POPESCU <andreimpopescu@gmail.com> - 2021-01-02 12:00 +0100
Re: mdadm usage The Wanderer <wanderer@fastmail.fm> - 2021-01-02 12:30 +0100
Re: mdadm usage Andrei POPESCU <andreimpopescu@gmail.com> - 2021-01-02 12:50 +0100
Re: mdadm usage Andrei POPESCU <andreimpopescu@gmail.com> - 2021-01-02 13:10 +0100
Re: mdadm usage The Wanderer <wanderer@fastmail.fm> - 2021-01-02 14:20 +0100
Re: mdadm usage The Wanderer <wanderer@fastmail.fm> - 2021-01-02 14:10 +0100
Re: mdadm usage deloptes <deloptes@gmail.com> - 2021-01-02 12:50 +0100
Re: mdadm usage "Thomas A. Anderson" <thomas.anderson@little-beak.com> - 2020-12-30 11:50 +0100
Re: mdadm usage "Alexander V. Makartsev" <avbetev@gmail.com> - 2020-12-30 13:30 +0100
Re: mdadm usage Dan Ritter <dsr@randomstring.org> - 2020-12-30 13:30 +0100
Re: mdadm usage Andy Smith <andy@strugglers.net> - 2020-12-30 15:00 +0100
Re: mdadm usage deloptes <deloptes@gmail.com> - 2020-12-30 22:10 +0100
Re: mdadm usage Nicholas Geovanis <nickgeovanis@gmail.com> - 2020-12-31 00:00 +0100
Re: mdadm usage Andrei POPESCU <andreimpopescu@gmail.com> - 2020-12-30 09:10 +0100
Re: mdadm usage Dan Ritter <dsr@randomstring.org> - 2020-12-30 04:00 +0100
Re: mdadm usage Andy Smith <andy@strugglers.net> - 2020-12-29 14:20 +0100
Re: mdadm usage mick crane <mick.crane@gmail.com> - 2020-12-29 16:40 +0100
Re: mdadm usage "Alexander V. Makartsev" <avbetev@gmail.com> - 2020-12-29 20:40 +0100
Re: mdadm usage Andy Smith <andy@strugglers.net> - 2020-12-30 14:40 +0100
Re: mdadm usage The Wanderer <wanderer@fastmail.fm> - 2020-12-30 14:50 +0100
Re: mdadm usage mick crane <mick.crane@gmail.com> - 2020-12-30 18:00 +0100
Re: mdadm usage Andrei POPESCU <andreimpopescu@gmail.com> - 2020-12-30 19:40 +0100
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