I have an external HD (western digital) with 1Tb. I use Linux but I wanted to reserve a cross platform partition on the disk. I decided to create two partitions and used the "disks" application to do it. I created one partition with the LUKS (version 1) encryption and the other one, cross platform, in NTFS filesystem. Things work fine on my OS but when I try to use the disk (the cross platform partition) on both windows and mac the device is not recognized. What could it be?
Next, output of "sfdisk -l /dev/sdb":
Disk /dev/sdb: 121600 cylinders, 255 heads, 63 sectors/track
Units = cylinders of 8225280 bytes, blocks of 1024 bytes, counting from 0
Device Boot Start End #cyls #blocks Id System
/dev/sdb1 0+ 36473- 36473- 292968750 83 Linux
/dev/sdb2 36473+ 121600- 85128- 683789062+ 83 Linux
/dev/sdb3 0 - 0 0 0 Empty
/dev/sdb4 0 - 0 0 0 Empty
Next, outputs of blkid /dev/sdb1 and blkid /dev/sdb2
/dev/sdb1: UUID="e3e7453c-451c-4608-8c39-55ff3b21c3a7" TYPE="crypto_LUKS"
/dev/sdb2: LABEL="Media" UUID="2D2CF22A62C95135" TYPE="ntfs"
sfdisk -l /dev/sdN
where/dev/sdN
is the actual device name for your portable drive.blkid /dev/sdb1 /dev/sdb2
? If you have any data on the drive you probably should migrate it off. Delete the parition meant for NTFS, and just create the NTFS volume under Windows.