Shrinking and extending partition


Will any problems arise if I shrink and extend these partitions? What OS should I do this from? I'm triple booting XP, Vista, W7 on two physical drives. Thanks.



Telephone Sanitizer (2nd Class)
Staff member
You can shrink Vista, but not extend W7.
Not directly from Windows, that is.
It won't allow a movement of the start position of the partition.
The BCD identifies the OS by a UID which is a combination of the disk signature and the partition start location. Moving the start breaks the boot, so Windows doesn't allow it.
You can do what you want with a bootable 3rd party partition manager, but you'll need to repair the BCD afterwards
Recovering the Vista Bootloader from the DVD - NeoSmart Technologies Wiki
unless the partition manager is very new and auto-fixes the BCD for you.


I used Paragon Partition manager from within windows, rebooted and it did its thing. Worked perfectly, and preserved my boot manager too. Thanks.