On Fri, Aug 29, 2025 at 12:52:24AM +0100, mick.crane wrote: > If I've got 3 200Gb disks that are working and one 1 Tb disk and want to be > able to copy and replace the 3 disks. > Can I dd copy them to .isos on the 1 Tb disk then put them back on other > disks so they boot? Nit: those are not .iso, but just raw images, but you probably know that. > Copy them to 3 partitions on the 1 Tb disk and dd an individual partition to > another disk and have it boot? I don't understand that part: if you have three images on the 1T disk, there is already a file system on it: either on the whole disk (atypical, but I do sometimes) or on one partition. In the first case, there is no room for any other "individual" partition. In the second case, said file system has to have at least 600G capacity (3x200G) plus some offcut (metadata, etc). So there isn't room for those other "3 partitions" (200G each). I'm missing something. All that said, I'd go with Gregs solution: install freshly on the 1T, rsync over. Or at least: make the file system on the 1T, rsync over and get your boot kit somehow running (I handwaved over that last part, this means at least having a UEFI partition, or possibly a /boot, yadda, yadda). Cheers -- t
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