maas-devel team mailing list archive

[Kyle O'Donnell <kyleo@xxxxxxx>]

looks like I have found a bug in the common script which creates the partition

1) it says the default is gpt but without any options specified it is executing pt_mbr)

2) there are params passed to the command executed within pt_mbr, specifically the size of the partition, which does not work, see some debug output below:

starting COMMON KYLE
ending common KYLE
I AM EXECUTING pt_mbr
1 disk is larger than max for mbr (2TB)
target /dev/sda size 2997752954880 end  maxend  pt1size 107372134
1 sfdisking with: echo '2048,107374182,L,*' | sfdisk --no-reread --force --Linux --unit S /dev/sda

i over changed the value of pt1size to the desired size, and the command which is executed confirms that the command is passed that value.  the problem is sfdisk seems to ignore this and still create the partition of the max size based n the 2TB limit.





----- Original Message -----
From: "Newell Jensen" <newell.jensen@xxxxxxxxxxxxx>
To: "Kyle O'Donnell" <kyleo@xxxxxxx>
Cc: "maas-devel" <maas-devel@xxxxxxxxxxxxxxxxxxx>
Sent: Thursday, August 7, 2014 8:48:04 PM
Subject: Re: [Maas-devel] curtin custom partitions

Kyle,

Looks like me email updated me with your new email after I sent
mine...weird.

In any event, the default partition function that is called in that shell
script is pt_gpt, not pt_mbr.  The reason there is a cap on pt_mbr is due
to the size limitation that MBR has:

"The organization of the partition table in the MBR limits the maximum
addressable storage space of a disk to 2 TB
<http://en.wikipedia.org/wiki/Tebibyte> (232 × 512 bytes)."





On Thu, Aug 7, 2014 at 5:34 PM, Kyle O'Donnell <kyleo@xxxxxxx> wrote:

> I *think* I found it:
>
> /usr/lib/curtin/helpers/common
>
> specifically the pt_mbr function:
>
>     local start="2048" pt1size="" maxsize="4294967296"
>
> Which corresponds to the partition it creates:
> /dev/sda1   *        2048  4294967295  2147482624   83  Linux
>
>
> ----- Original Message -----
> From: "Kyle O'Donnell" <kyleo@xxxxxxx>
> To: "Newell Jensen" <newell.jensen@xxxxxxxxxxxxx>
> Cc: "maas-devel" <maas-devel@xxxxxxxxxxxxxxxxxxx>
> Sent: Thursday, August 7, 2014 7:22:02 PM
> Subject: Re: [Maas-devel] curtin custom partitions
>
>
>
> How does it determine its going to create a single 2TB root filesystem?
> What code can i change to do this?
> On Aug 7, 2014 7:17 PM, Newell Jensen <newell.jensen@xxxxxxxxxxxxx> wrote:
>
> Kyle,
>
> Currently there is no support for creating a custom partition table using
> the fastpath installer. This would be a nice feature.
>
> Newell
>
>
> On Thu, Aug 7, 2014 at 1:35 PM, Kyle O'Donnell < kyleo@xxxxxxx > wrote:
>
>
> Hi,
>
> I am trying to figure out how to create a custom partition table using the
> fastpath installer. Has anyone done this before?
>
> I have ~2.7TB of usable drive space, the default install creates one 2TB
> partition of root and nothing else. I'd like to be able to configure lvm,
> but I would settle for being able to set the root partition size.
>
> Thanks,
> Kyle
>
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