Your message dated Fri, 28 Jul 2017 12:33:26 +0200
with message-id <[email protected]>
and subject line Re: Disk partitions not created along cylinder boundaries
has caused the Debian Bug report #614632,
regarding fdisk: error message about cylinder alignment confuses people into 
thinking the partitioner is wrong
to be marked as done.

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If this is not the case it is now your responsibility to reopen the
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-- 
614632: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=614632
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--- Begin Message ---
Package: netinstall
Version: Debian GNU/Linux 6.0.0 "Squeeze" - Official i386 NETINST Binary-1, 20110205-14:34

When a disk is partitioned, the partitions are later found to not end/start on cylinder boundaries. For example:

~# fdisk -l /dev/sda

Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0007d8f1

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1               1         973     7811072   82  Linux swap / Solaris
Partition 1 does not end on cylinder boundary.
/dev/sda2   *         973      121602   968949760   fd  Linux raid autodetect
~#

The above example was actually the result of an earlier amd64 version of the Debian squeeze netinstaller, downloaded on the 6th of November 2010. (The i386 version mentioned at the beginning of this report was found to have this same problem yesterday and also involved the partitioning a set of 1 TB disks that were configured in a RAID1 array. Until then I had not noticed that anything was amiss with my earlier installations.)

However, an i386 version downloaded on the 19th of June 2010 does not have this problem and I was able to properly complete the installation yesterday by starting the installation and partitioning the disks with this older version, but then aborting that and completing the procedure with the most recent version.

My work method also involved using all space available on the RAID1 volume in question for LVM2. However, after doing this I saw that something 56.2 bytes of disk space were marked as "unusable." This was the case with the disk systems that did not eventually turn out to end on cylinder boundaries. When it did work properly the other day, the left over unusable space was exactly 512 bytes.



--- End Message ---
--- Begin Message ---
Hi Jaap,

On Fri, Jul 28, 2017 at 12:41:14AM +0200, Jaap Winius wrote:
> Quoting Andreas Henriksson <[email protected]>:
> 
> >Thanks for your bug report (and sorry for the very late followup).
> >
> >On Tue, Feb 22, 2011 at 07:51:28PM +0100, Jaap Winius wrote:
> >>Package: netinstall
> >>Version: Debian GNU/Linux 6.0.0 "Squeeze" - Official i386 NETINST Binary-1,
> >>20110205-14:34
> 
> A late response indeed: that was almost six and a half years ago! 

Just trying to work my way slowly down the existing open bug reports.
It's not uncommon that I'm replying to things twice as old
unfortunately. :P

> I think I was using netinstall to install Debian squeeze, and then
> noticed afterwards that the partitions that had been created did not
> start on cylinder boundaries like I expected. Or, at least on sector
> 2048. So, I figured netinstall was not operating fdisk properly. I
> think. It was, after all, a long time ago. :-)
> 
> Just close report.

Doing so now as we seem to be thinking similarly about this issue.

Regards,
Andreas Henriksson

--- End Message ---

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