If you wonder what external storage can be directly attached to an IBM i, please check a document at the bottom.
This is an example
IBM i with external storage – support matrix
Published
If you wonder what external storage can be directly attached to an IBM i, please check a document at the bottom.
This is an example
IBMi.org - Bart's blog 
Is this your document? May I publish it in our Members Magazine and on http://www.data3.se ?
Thank you Torbjorn,
Its the official IBM document.
And don’t forget the only other external storage solution for IBM i is EMC Corporation!