according to UCS V.2.2 interop matrix
http://www.cisco.com/c/dam/en/us/td/docs/unified_computing/ucs/interoperability/matrix/r_hcl_B_rel2-21.pdf
DS 3500, DS 4800, DS 5300, DS 8100,
DS 8800, SVC, Storwize V7000, IBM
N-Series, XIV(Gen 2), XIV(Gen3)
Storwize V7000 is supported ! don't know, but Storwize V3700 is newer ?
Check the MDS version, and maybe upgrade to a up to date release.