Thanks for your input. The HOMEHOST parameter (in /etc/mdadm/mdadm.conf) is set to <system>.The RAID-device does still show the old hostname in both mdadm.conf and the superblock of the indiviual devices. The system is booting from this RAID without problems. Nevertheless, I would like to change to the new hostname.
If I would change the hostname of the ARRAY in mdadm.conf I should also change the hostname within the superblocks. However, I have no idea how to change the homehost settings in the superblock ...
Peter On 22.02.2016 11:43, Alan Corey wrote:
Ah: "In a nutshell: Your RAID devices store the hostname in the superblock, so that when "mdadm --assemble" is called, it only assembles RAID devices that belong to the running host. (The rationale is that if you, for some reason, have hooked up a RAID device from some other host, and mdadm auto-assembles that, Bad Things(tm) may happen. It's a safety feature for that very rare circumstance.) Either update the homehost setting in the superblocks, or change the HOMEHOST parameter in /etc/mdadm/mdadm.conf . (If it's set to "<system>", which it probably is, mdadm will substitute the system's current hostname.)" from https://bugs.launchpad.net/ubuntu/+source/mdadm/+bug/325827 On 2/22/16, Alan Corey <alan01346@gmail.com> wrote:No clue but I wondered why a RAID stack would need the hostname so I Googled: raid hostname You're not alone by the looks. And it's not peculiar to the hardware. http://askubuntu.com/questions/63980/how-do-i-rename-an-mdadm-raid-array comes close. I haven't used a RAID in years and that was under Windows NT and OpenBSD. Seems like the installer should ask though, I remember that question from a few days ago when using an install disk to get into rescue mode (i386/686). If you really didn't get asked (debian was the default I saw), that might be a legitimate bug. On 2/22/16, Nagel, Peter (IFP) <peter.nagel@kit.edu> wrote:I have just done a new installation on a Kirkwood system (QNAP-TS 420) using the expert mode. After the the installation I realized that the installer hasn't asked me for the hostname. I have now changed the hostname but it turned out that the RAID-device is still containing the old name. Since the RAID-device contains the / directory I can not just stop and re-assamble the RAID-device with a new name. How can I change the name of the RAID-device? Peter-- Credit is the root of all evil. - AB1JX
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