This bug has been copied from bug #1452603 and has been proposed to be backported to 7.4 z-stream (EUS).
The backport was already posted to rhvirt-patches (with RHEL7.5 tag): [RHEL7.5 seabios PATCH 0/4] Increase limit on number of scanned LUNs I've asked for more reviews.
Fix included in seabios-1.10.2-3.el7_4.2
Reproduced bug with seabios-1.10.2-3.el7_4.1.x86_64. Verified bug with seabios-1.10.2-3.el7_4.2.x86_64. Test cmd is in attachment.
Created attachment 1409688 [details] seabios command line
According to comment7 & comment*, set this bug as verified
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2018:1147