Petr Uzel wrote: > On Sun, Oct 09, 2011 at 10:30:59PM +0530, Keshav P R wrote: >> Hi, >> Parted in script mode (latest git snapshot) fails to run when "unit >> MiB" >> is used (mainly for mkpart commands). I am planning to use similar commands >> in >> Archlinux installer script. Please check the attached file >> test_parted_unit.sh > > Hi, > > If the user specifies position of start/end of the partition with > units like MB, kB, cyl and similar, parted is allowed to adjust the > specified start/end of the partition in some sensible range - IIRC > this is always half size of the unit in both directions. See the note > about IEC binary units in parted info page. > > However, this 'feature' is disabled for following units: sectors, MiB, > GiB, and similar. Therefore, if you create the partition starting at > 1 MiB and ending at 2 MiB, it will occupy sectors 1024-2048 (inclusive). > > Following request to create partition from 2MiB to 202MiB fails, > because that would mean the starting sector (2048) would overlap with > the last sector of the first partition and parted is not allowed to > fix it. > > I have just submitted a patch that makes the message more informative > by including exact partition geometry in sectors: > > ./parted/parted -s /dev/sdd unit MiB mkpart PART 2 3 > Error: You requested a partition from 2.00MiB to 3.00MiB (sectors 2048 - > 3072). > The closest location we can manage is 2.00MiB to 3.00MiB (sectors 2049 - 3072) > > > What might be even better solution is if the user specifies the _end_ > in IEC units, the partition created by parted would actually end one > sector before. > > Advantages: > - users would not run into this issue if using only IEC units > - no unnecessary gaps between partitions and alignment constraints > still met (AFAIU we don't care if the partition end is aligned) > - partitions created using IEC units would also have size divisible by > the unit (without the extra sector) > > Disadvantages: > - yet another change of IEC units semantics > - different semantics for start and end > - more bytes to document it :) > - ??? > > What do you guys think?
I like it. > If this sounds good, I will submit a patch. Please do. _______________________________________________ bug-parted mailing list bug-parted@gnu.org https://lists.gnu.org/mailman/listinfo/bug-parted
