On Mon, Mar 15, 2010 at 9:59 PM, Michael Evans <mjevans1983@xxxxxxxxx> wrote: > On Mon, Mar 15, 2010 at 7:53 PM, Simon Matthews > <simon.d.matthews@xxxxxxxxx> wrote: >> On Mon, Mar 15, 2010 at 5:36 PM, Michael Evans <mjevans1983@xxxxxxxxx> wrote: >>> On Sun, Mar 14, 2010 at 10:23 PM, Simon Matthews >>> <simon.d.matthews@xxxxxxxxx> wrote: >>>> I have just built a system and have it booting off a software raid >>>> partition. The raid sets use devices /dev/md0, /dev/hd1, /dev/md2, >>>> /dev/md3. >>>> >>>> I now need to transfer some additional disks to this system. These >>>> disks are presently in another system where they host a number of raid >>>> sets, currently also /dev/md0 - /dev/md4. >>>> >>>> I need to ensure that the data on the raid set that I am adding to the >>>> system is not lost. However, clearly, I can't have the raid sets on >>>> these disks come up as /dev/md0-md4. How do I ensure this and have >>>> these raid sets come up on /dev/md5 and higher? >>>> >>>> Simon >>>> -- >>>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in >>>> the body of a message to majordomo@xxxxxxxxxxxxxxx >>>> More majordomo info at http://vger.kernel.org/majordomo-info.html >>>> >>> >>> Either use an mdadm.conf to specify the mapping of UUID to md device >>> (which will over-ride any auto-detected requests), or use the >>> home-host fallback. Obviously the administrator specifying how they'd >>> prefer mdadm to assemble the drives is preferable. >> >> I'm not aware of the "home-host fallback" can you give me some pointers on this? >>> >>> You will probably want to regenerate your initrd; if you are using >>> auto-assembly on root without an initrd, I highly suggest upgrading to >>> use an initrd/initramfs. You might find this one easy to customize >>> for your needs if your distribution lacks one or you dislike the one >>> it generates: http://sourceforge.net/projects/aeuio/ >> >> Fortunately Gentoo includes mkinitrd so I can try this if other >> methods don't work reliably. >> >> Simon >> >>> >> > > man mdadm > /host > > --homehost= > > This will override any HOMEHOST setting in the config file and > provides the identity of the host which should be considered the home > for any arrays. > > ... etc > > Before asking any further questions I highly suggest reading the > manual, completely, at least twice. > In my defense, I did try to google this, but I looked for "home-host" or "home host" and nothing turned up. Many thanks for your help. I think this will solve my question about added existing arrays to a system. Simon -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
