If I GPT partition a 4TB disk when it is connected to SATA, then it works fine. If I take the disk and put in the an USB3 enclosure, then I get
[root@localhost liveuser]# sfdisk /dev/sdb
sfdisk: Checking that no-one is using this disk right now ...
sfdisk: OK
Disk /dev/sdb: 486401 cylinders, 255 heads, 63 sectors/track
Old situation:
Units: cylinders of 8225280 bytes, blocks of 1024 bytes, counting from 0
Device Boot Start End #cyls #blocks Id System
/dev/sdb1 0+ 267349- 267350- 2147483647+ ee GPT
start: (c,h,s) expected (0,0,2) found (0,0,1)
/dev/sdb2 0 - 0 0 0 Empty
/dev/sdb3 0 - 0 0 0 Empty
/dev/sdb4 0 - 0 0 0 Empty
sfdisk: Input in the following format; absent fields get a default value.
<start> <size> <type [E,S,L,X,hex]> <bootable [-,*]> <c,h,s> <c,h,s>
Usually you only need to specify <start> and <size> (and perhaps <type>).
sfdisk: /dev/sdb1 :
There is an EXT3 filesystem on this disk.
Question
Why can't a GPT partitioned disk on SATA be read on USB?