On Wed, 28 Oct 2015 10:28:17 +0500, Roman Mamedov wrote: > On Tue, 27 Oct 2015 21:31:01 +0000 > Wols Lists <antlists@xxxxxxxxxxxxxxx> wrote: > >> On 27/10/15 16:45, Doug Herr wrote: >> > 1. Partition new drive (plugged in via external SATA dock) >> > #fdisk /dev/sdc >> > (make it an exact match of sda/sdb unless it turns out to be smaller, >> > in which case I can shrink /boot to make room.) >> >> man gdisk. >> >> Look at the "u" option in the "expert" menu - it'll probably save you >> some work :-) > > Unfamiliar with 'gdisk', but when I need the exact same set of partitions on > another drive, I use sfdisk: > > # sfdisk -d /dev/sda > sda.sf > # sfdisk /dev/sdb < sda.sf > > You could even do it in one step: > > # sfdisk -d /dev/sda | sfdisk /dev/sdb Thanks much to all who have replied and all who post here. Yup, the sfdisk copy is one that I am ready to use if needed but your replies have triggered better googling and I am now planning to use fdisk (I am in Fedora 22) to manually partition the new disk. I don't think I have any need for GPT yet but what I realized is that my current set of disks was created when fdisk was still starting at sector 63 where now it uses 2048. I don't think it matters much for my current set of Hitachi HDT721010SLA360 drives. It might not even matter for the slightly newer "E7K1000" that is on the way to me, but I do want to stick with the current standards as best I can. I have room to tweak it since I have a non-RAID /boot partition that is easily large enough to lend space as needed. I do plan to play with GPT to learn about it and to be more ready for the next computer if it is the default at that point. Oh, I also added a step in my plan. Adding my new partitions as spares first will alert me of size errors (if smaller) *before* any of the replacement jobs kick off: For each: # mdadm /dev/md4 --add-spare /dev/sdc2 If the above does not complain then move forward for each: # mdadm /dev/md3 --replace /dev/sda2 --with /dev/sdc2 And fear not, I will be updating my backups before moving forward with this. -- Doug Herr -- 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
