https://git.reactos.org/?p=reactos.git;a=commitdiff;h=26408b02f14ec4e8e08965421489c72aa5caa094
commit 26408b02f14ec4e8e08965421489c72aa5caa094 Author: Pierre Schweitzer <[email protected]> AuthorDate: Sun Nov 11 17:34:35 2018 +0100 Commit: Pierre Schweitzer <[email protected]> CommitDate: Sun Nov 11 17:38:37 2018 +0100 [SETUP] Align partition start at 2048 minimum This will allow compatibility with modern OSes and modern disk management utilities. It will also improve performances by properly aligning partition start. And it will let enough room at the begin of the disk for 3rd party bootloaders. WARNING: this is not compatible with previous partition model, and old one will likely not be compatible. You'll have to erase your whole partition table and start from scratch. --- base/setup/lib/utils/partlist.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/base/setup/lib/utils/partlist.c b/base/setup/lib/utils/partlist.c index 7145b2f10d..0d66b6c87e 100644 --- a/base/setup/lib/utils/partlist.c +++ b/base/setup/lib/utils/partlist.c @@ -819,7 +819,10 @@ ScanForUnpartitionedDiskSpace( NewPartEntry->DiskEntry = DiskEntry; NewPartEntry->IsPartitioned = FALSE; - NewPartEntry->StartSector.QuadPart = (ULONGLONG)DiskEntry->SectorAlignment; + if (DiskEntry->SectorAlignment < 2048) + NewPartEntry->StartSector.QuadPart = 2048ULL; + else + NewPartEntry->StartSector.QuadPart = (ULONGLONG)DiskEntry->SectorAlignment; NewPartEntry->SectorCount.QuadPart = AlignDown(DiskEntry->SectorCount.QuadPart, DiskEntry->SectorAlignment) - NewPartEntry->StartSector.QuadPart; @@ -837,7 +840,10 @@ ScanForUnpartitionedDiskSpace( } /* Start partition at head 1, cylinder 0 */ - LastStartSector = DiskEntry->SectorAlignment; + if (DiskEntry->SectorAlignment < 2048) + LastStartSector = 2048ULL; + else + LastStartSector = DiskEntry->SectorAlignment; LastSectorCount = 0ULL; LastUnusedSectorCount = 0ULL;
