Control: tag -1 moreinfo On Tue, 2013-01-08 at 16:04 +0100, varacanero wrote: > Package: installation-reports > Severity: important > Tags: d-i > > > > -- Package-specific info: > > Boot method: network > Image version: > http://ftp.us.debian.org/debian/dists/squeeze/main/installer-amd64/ > Date: Mon, 07 Jan 2013 19:50:00 -0800 > > Machine: X9SCL/X9SCM mb, 16GB mem, Intel(R) Xeon(R) CPU E3-1265L V2 @ > 2.50GHz, amd64 system, kvm-qemu guest installation > > Partitions: see below > Base System Installation Checklist: > [O] = OK, [E] = Error (please elaborate below), [ ] = didn't try it > > Initial boot: [O] > Detect network card: [O] > Configure network: [O] > Detect CD: [ ] > Load installer modules: [O] > Detect hard drives: [O] > Partition hard drives: [E] > Install base system: [O] > Clock/timezone setup: [O] > User/password setup: [O] > Install tasks: [O] > Install boot loader: [O] > Overall install: [O] > > Comments/Problems: > > On the kvm host, i installed a guest system with virt-install (0.500.3-2): > > lvcreate -L 1.2G -n debian_squeeze_baseimage vg_toad0 > > virt-install --name debian-squeeze-baseimage --ram 512 --os-type linux > --os-variant debiansqueeze --virt-type kvm --disk > path=/dev/vg_toad0/debian_squeeze_baseimage > --location=http://ftp.us.debian.org/debian/dists/squeeze/main/installer-amd64/ > --nographics -x"DEBIAN_FRONTEND=text console=ttyS0" > > I need a guest with just one (root) partition, no swap, because i want > to easily grow the partition after later cloning. So i chose manual > partitioning, created one partition for /, and went on. > Installation succeeded, guest did boot well in kvm, however, the > partition looks broken with sfdisk: > > sfdisk -l /dev/mapper/vg_toad0-debian_squeeze_baseimage > > Disk /dev/mapper/vg_toad0-debian_squeeze_baseimage: 157 cylinders, 255 > heads, 63 sectors/track > Warning: The partition table looks like it was made > for C/H/S=*/238/17 (instead of 157/255/63). > For this listing I'll assume that geometry. > > Units = cylinders of 2071552 bytes, blocks of 1024 bytes, counting from 0 > > Device Boot Start End #cyls #blocks Id System > /dev/mapper/vg_toad0-debian_squeeze_baseimage1 0+ 623- > 623- 1259520 83 Linux > start: (c,h,s) expected (0,120,9) found (0,32,33) > end: (c,h,s) expected (623,25,5) found (156,237,17) [...]
We try to use 1 MiB alignment for partitions, not cylinder alignment.
This is important for performance on 4K-sectored hard disks, RAID arrays
and flash drives. Using the geometry that sfdisk reported but decided
to ignore (157/255/63), the start is at 32 * 63 + 33 - 1 = 2048 sectors
= 1 MiB exactly and the end is at (156 * 255 + 237) * 63 + 17 = 2521088
sectors = 1231 MiB exactly. So this all looks good.
The various programs you've used to inspect the image probably should be
trusting the claimed geometry and should not be confused by 1 MiB
alignment.
A raw dump of the partition table:
dd if=/dev/mapper/vg_toad0-debian_squeeze_baseimage bs=512 count=1 | od
-tx1 -Ax
would help to confirm where the error lies.
Ben.
--
Ben Hutchings
If you seem to know what you are doing, you'll be given more to do.
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