On Mon, Apr 06, 2009 at 02:24:40PM -0500, David Lehman wrote:
> On Mon, 2009-04-06 at 21:17 +0200, Joel Granados wrote:
> > On Mon, Apr 06, 2009 at 12:36:38PM -0500, David Lehman wrote:
> > > On Mon, 2009-04-06 at 19:24 +0200, Joel Granados Moreno wrote:
> > > > ---
> > > > storage/partitioning.py | 14 +++++++++++---
> > > > 1 files changed, 11 insertions(+), 3 deletions(-)
> > > >
> > > > diff --git a/storage/partitioning.py b/storage/partitioning.py
> > > > index eba0cb7..245d986 100644
> > > > --- a/storage/partitioning.py
> > > > +++ b/storage/partitioning.py
> > > > @@ -755,17 +755,25 @@ def allocatePartitions(disks, partitions):
> > > >
> > > > # create minimum geometry for this request
> > > > # req_size is in MB
> > > > - sectors_per_track = disk.device.biosGeometry[2]
> > BTW, is there any reason for having sectors_per_track besides playing
> > nice with cylinder alignment.?
>
> It had nothing to do with cylinder alignment. I saw that the first
> partition was expected to start at sector 63 and assumed that meant the
> start of the second track.
Well, in anycase, since we take out the free values from parted, there
is no need to do this calculation. since free.start should give us a
valid value (valid as in no less than its suppose to be).
Or can free start become less that the firs free partition (numver=-1)
start value?
>
> > > > length = (_part.req_size * (1024 * 1024)) / sectorSize
> > > > new_geom = parted.Geometry(device=disk.device,
> > > > - start=max(sectors_per_track, free.start),
> > > > + start=free.start,
> > > > length=length)
> > > >
> > > > + # create maximum and minimum geometries for constraint
> > > > + max_geom = parted.Geometry(device=disk.device,
> > > > + start=max(0 , free.start - 1),
> > > > + length=min(length + 1, disk.device.length))
> > >
> > > Shouldn't this be more like
> > >
> > > start = max(0, free.start - 1)
> > > max_geom = parted.Geometry(device=disk.device,
> > > start=start,
> > > length=min(length + 1, disk.device.length -
> > > start))
> > >
> > > (since it seems possible for start to be non-zero in which case we
> > > certainly don't want max to run off the end of the device. Or does
> > > parted cover that for us?)
> > >
> > > > + min_geom = parted.Geometry(device=disk.device,
> > > > + start=free.start + 1,
> > > > + length=length-1)
> > > > +
> > > > +
> > > > # create the partition and add it to the disk
> > > > partition = parted.Partition(disk=disk,
> > > > type=part_type,
> > > > geometry=new_geom)
> > > > - constraint = parted.Constraint(exactGeom=new_geom)
> > > > + constraint = parted.Constraint(maxGeom=max_geom, minGeom=min_geom)
> > > > disk.addPartition(partition=partition,
> > > > constraint=constraint)
> > > > log.debug("created partition %s of %dMB and added it to %s" %
> > >
> > > _______________________________________________
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> >
>
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--
Joel Andres Granados
Brno, Czech Republic, Red Hat.
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