I just go to the cisco website and saw the document which name "Cisco Approved Vendor List for network Storage Systems"
And, on the list i can't find Western Digital RE4 1TB. But, Western Digital RE4 2TB is on the list.
That mean NSS4000 cannot support Western Digital RE4 1TB ??
The AVL or Approved Vendor List contains the list of drives that have been tested by Cisco and are designed by the manufacturer to run on a 24x7 duty cycle. That's not to say that other drives will not work with our storage products, they just have not been internally tested by Cisco. This is why we sell our storage products with the option to purchase them with drives (which come from the AVL) or without drives. You can use any compatible hard drives you desire however Cisco highly recommends use of drives from the AVL for full support and compatibility.
Excerpt from the AVL:
The Cisco Small Business Smart Storage Approved Disk Drive List provides
recommendations for compatible hard drives, UPS, and external enclosure for use
in the NSS 322, NSS 324, and NSS 326 Series of Network Attached Storage
(NAS) products. Cisco recommends using enterprise-class hard drives that are
rated for 24 x 7 applications. If you are using an external USB or eSATA drive or
enclosure that is not on the AVL list, you may be able to read and write to it but for
complete feature support and long term data integrity, we recommend a drive or
enclosure that has been fully tested and approved. For information about the
product warranty, see the User Guide for your specific product.