Have you powered-off and powered-on the Netgear SC-101?
It appears that the Netgear SC-101 is requesting every 30 seconds! Are you saying that you don't start seeing those messages until 24 hours?
I would expect to see something like this if the Netgear got its original lease as an hour lease, and then the DHCP server (your router) was reconfigured to the 7 day period and reset. The DHCP offer being made is being rejected by the SC-101 (probably because of some mismatch), so it keeps asking. It will do this until the lease it thinks it has is expired, then it is supposed to revert to an deconfigured IP and make broadcasts for any DHCP assignment -- at which time it'll stop rejecting and will accept the offer.
Powering off and powering on the SC-101 might clear this, or you can just wait, and then either way life should be good from that point forward.
If it keeps happening over and over, then the above was not the issue.
It is a Network Hard Drive, not a Computer.
There is no distinction made by a DHCP server. It would say the same thing if the dishwasher requested an IP address from it. :-)