Not being able to reread the partition table - why is Linux so 90x?

Hello, I wonder why in 2013 I still cannot modify _unused_ partitions on the fly, yeah, the Internet is full of: # hdparm -z /dev/sda /dev/sda: re-reading partition table BLKRRPART failed: Device or resource busy # fdisk (after adding a new partition using unused space on my hdd) ... Command

Not being able to reread the partition table - why is Linux so 90x?

Hello, I wonder why in 2013 I still cannot modify _unused_ partitions on the fly, yeah, the Internet is full of: # hdparm -z /dev/sda /dev/sda: re-reading partition table BLKRRPART failed: Device or resource busy # fdisk (after adding a new partition using unused space on my hdd) ... Command