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Bug 881025 - RFE: allow exact partition location
Summary: RFE: allow exact partition location
Alias: None
Product: Fedora
Classification: Fedora
Component: python-blivet
Version: 18
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
Assignee: David Lehman
QA Contact: Fedora Extras Quality Assurance
Depends On:
TreeView+ depends on / blocked
Reported: 2012-11-28 13:02 UTC by Jan Safranek
Modified: 2014-02-06 07:12 UTC (History)
7 users (show)

Fixed In Version: python-blivet-0.19-1
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2014-02-05 23:17:58 UTC
Type: Bug

Attachments (Terms of Use)
experimental patch (4.92 KB, application/force-download)
2012-11-28 13:02 UTC, Jan Safranek
no flags Details

Description Jan Safranek 2012-11-28 13:02:36 UTC
Created attachment 653487 [details]
experimental patch

Description of problem:
We need to be able to set start and end partition sector address when creating a a partition, for example as parameter of PartitionDevice.__init__(..., start=None, end=None).

Version-Release number of selected component (if applicable):

I got experimental patch from David Lehman (attached), which was working on F17, but I cannot find it upstream.

Comment 1 Jan Safranek 2012-11-30 10:52:10 UTC
In addition, I'd like to have either possibility to specify unaligned partition start/end or get best *working* region for given partition size.

There is pyanaconda.storage.partitioning.getBestFreeSpaceRegion, but it returns unaligned region and PartitionDevice.__init__(...,start, end) fails.

Example: I have one huge partition over whole device:

Disk /dev/sda: 1074MB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Number  Start   End     Size    Type     File system  Flags
 1      1049kB  1073MB  1072MB  primary

If I ask for 900 kB partition, getBestFreeSpaceRegion finds place at the start, between MBR (sector 1) and start of the large partition. But if I put these addresses to PartitionDevice.__init__, it later fails.

What I want is getBestFreeSpaceRegion (or similar function) to return something that PartitionDevice.__init__  accepts. It really does not matter if the fix is getBestFreeSpaceRegion returning aligned regions or PartitionDevice.__init__ accepting unaligned ones.


Comment 2 Jan Safranek 2013-02-22 16:08:01 UTC
With dlehman we've agreed that's simple and will be available in F19 (at least the exact partition location).

Non-aligned partition or getBestFreeSpaceRegion() returning aligned geometry can be done later.

Comment 3 David Lehman 2013-07-12 22:06:27 UTC
I got this working today, and will send patches early next week.

There are some limitations that should be noted. First, any partition with an explicitly-specified start sector will not be aligned or adjusted in any way. Second, any partition for which start/end sectors are specified must be constrained to a single disk.

Comment 4 Fedora End Of Life 2013-12-21 15:42:40 UTC
This message is a reminder that Fedora 18 is nearing its end of life.
Approximately 4 (four) weeks from now Fedora will stop maintaining
and issuing updates for Fedora 18. It is Fedora's policy to close all
bug reports from releases that are no longer maintained. At that time
this bug will be closed as WONTFIX if it remains open with a Fedora 
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Comment 5 Fedora End Of Life 2014-02-05 23:17:58 UTC
Fedora 18 changed to end-of-life (EOL) status on 2014-01-14. Fedora 18 is
no longer maintained, which means that it will not receive any further
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