On 12/19/2016 7:19 AM, Bjørn Forsman wrote: > Hi all, > > [My name is Bjørn Forsman, end user of parted, I'm using parted as my > primary partitioning tool.] > > When I run parted (latest version, 3.2) on an ISO file, it gets > confused about the block size: > > $ parted ubuntu-16.04-desktop-amd64.iso p > WARNING: You are not superuser. Watch out for permissions. > Warning: The driver descriptor says the physical block size is 2048 > bytes, but Linux says it is 512 bytes. > Ignore/Cancel?
This is because the image contains a mac partition table using a block size of 2048 bytes since the image is meant to go on a cdrom, which has a sector size of 2048 bytes. > If I select "Ignore", it misinterprets the size and the partition table: > > Model: (file) > Disk /home/bfo/Downloads/ubuntu-16.04-desktop-amd64.iso: 5944MB > Sector size (logical/physical): 2048B/512B > Partition Table: mac > Disk Flags: > > Number Start End Size File system Name Flags > 1 2048B 6143B 4096B Apple > 2 1479MB 1481MB 2425kB EFI No; that is correctly interpreting the partition table. > And if I select "Cancel" it gets the size right but doesn't show any more > data: > > Model: (file) > Disk /home/bfo/Downloads/ubuntu-16.04-desktop-amd64.iso: 1486MB > Sector size (logical/physical): 512B/512B > Partition Table: unknown > Disk Flags: This has the size wrong, and shows no data since you bailed out of trying to interpret the mac partition table. > Why cannot parted handle this like fdisk? Because fdisk does not know about mac partition tables.
