Hi Steffen, [...]
> > I had to find that *even if I preserve_always* a certain partition at > the "end" of the disk, setup-storage would complain about it (not ending > at a cylinder boundary: this is a RAID on a 3ware controller which would > fake geometries anyway) - I had to backup, drop the preserve_* setting, > and restore after installation. > Same happened to a 7TB partition (on an Areca controller) which had to be > created by hand previously (leaving the minimum of 34 sectors for GPT > information at the beginning and end): I had to workaround this (by > not declaring the disk at all in disk_config, and using my old manual > setup scripts to conditionally mkfs and add the fstab line). > Now quite some time has passed by since you posted this (Sorry!!) and current setup-storage doesn't enforce this anymore, it only prints a warning (a lack of alignment might pose problems with some other OS, at least it apparently did in the past). > In addition, I noticed that the new style would make partitions on "real > disks" (no geometry translation) _smaller_ than they were before, resulting > in a gap: > For non-preserved partitions, however, current setup-storage in mainline FAI still rounds partition sizes down to the next cylinder boundary. Because we don't care much about $other_OS, I have now dropped this in the current experimental tree. > Disk /dev/sda: 164.6 GB, 164696555520 bytes > 255 heads, 63 sectors/track, 20023 cylinders, total 321672960 sectors > Units = sectors of 1 * 512 = 512 bytes > Disk identifier: 0x39d139d0 > > Device Boot Start End Blocks Id System > /dev/sda1 * 63 5237189 2618563+ 83 Linux > /dev/sda2 5237190 7325639 1044225 82 Linux swap / Solaris > /dev/sda3 7325640 9414089 1044225 82 Linux swap / Solaris > /dev/sda4 9414090 321669494 156127702+ f W95 Ext'd (LBA) > /dev/sda5 9414153 11502539 1044193+ 83 Linux > /dev/sda6 11502603 13590989 1044193+ 83 Linux > /dev/sda7 13591053 16723664 1566306 83 Linux > /dev/sda8 16820118 321669494 152424688+ 83 Linux > > (note the gap between sda7 and sda8 - about 96000 sectors!) > > The corresponding disk_config partition sizes didn't change for years: > > disk_config sda disklabel:msdos preserve_always:8 bootable:1 > primary / 2560 ext3 rw,errors=remount-ro > createopts="-m1" > primary swap 1024 swap rw > primary swap 1024 swap rw > logical /tmp 1024 ext3 rw,nosuid > createopts="-m0" > logical /var 1024 ext3 rw > createopts="-m1" > logical /opt 1536 ext3 rw > createopts="-m1" > logical /scratch 1- xfs rw > > Apparently the rounding strategy has changed... intentionally? > [...] Well, I wouldn't call it truely intentional, but as setup-storage is a rewrite from scratch, such differences don't come absolutely unexpected. In future releases, however, I'd hope to avoid such gaps as rounding down to cylinder bounds has just been dropped. Best, Michael
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