
    Scotty Iverson FLOYD, Appellant, v. Marty C. ANDERSON, Warden; T.C. Peterson, Warden; Dr. George Santini; P.A.C. Reudy; P.A. Edmonds; P.A. Liz Evans; Asst. H.S.A. Val Encarnanze; P.A. Bea Glavinovich; H.S.A. Chapman; C.R.N.P. Muth; H.S.A. Furtenz; H.S.A.Z. Gutierrez; Does 1-20, Appellees.
    No. 05-4280.
    United States Court of Appeals, Eighth Circuit.
    Submitted: Feb. 1, 2007.
    Filed: Feb. 22, 2007.
    Scotty Iverson Floyd, Sandstone, MN, pro se.
    Patricia R. Cangemi, U.S. Attorney’s Office, Minneapolis, MN, for Appellees.
    Before WOLLMAN, MURPHY, and BYE, Circuit Judges.
   PER CURIAM.

Federal inmate Scotty Iverson Floyd appeals the district court’s adverse grant of summary judgment in his action brought under Bivens v. Six Unknown Named Agents of Fed. Bureau of Narcotics, 403 U.S. 388, 91 S.Ct. 1999, 29 L.Ed.2d 619 (1971). Having carefully reviewed the record, we agree with the district court that Floyd failed to create any trialworthy issues on his Eighth Amendment claims. See Alberson v. Norris, 458 F.3d 762, 765 (8th Cir.2006) (summary judgment standard of review; disagreement with treatment decisions does not rise to level of Eighth Amendment violation, and to show deliberate indifference, plaintiff must show more than even gross negligence); Moody v. St. Charles County, 23 F.3d 1410, 1412 (8th Cir.1994) (party seeking to defeat summary judgment motion must substantiate allegations with sufficient probative evidence to permit finding in his favor based on more than speculation or conjecture). We reject Floyd’s arguments about discovery, because he did not properly seek postponement of the summary judgment ruling under Federal Rule of Civil Procedure 56(f). See Stanback v. Best Diversified Prods., Inc., 180 F.3d 903, 911 (8th Cir.1999) (discussing requirements under Rule 56(f)). Accordingly, we affirm. See 8th Cir. R. 47B. 
      
      . The Honorable Ann D. Montgomery, United States District Judge for the District of Minnesota, adopting the report and recommendations of the Honorable Raymond L. Erickson, United States Magistrate Judge for the District of Minnesota.
     