Host A and B can both access LUNs one to ten in a single SAN LUN 11 has been created and Host A can access it but Host B cannot. Which of the following will likely be the cause of this issue?

A faulty fiber HBA would likely prevent Host B from accessing any LUNs, not just the newly created LUN 11, since it successfully accesses LUNs 1-10.

For Host B to access a LUN, its HBA's World Wide Port Name (WWPN) must be correctly configured in the SAN's zoning and LUN masking policies for that specific LUN. If LUN 11 was newly created and Host B cannot access it, it strongly suggests that Host B's WWPN has not been correctly added to the access group or zone for LUN 11, even if it was correctly configured for LUNs 1-10.

An incorrect HBA software version might cause broader connectivity or performance issues but is unlikely to selectively prevent access to only one new LUN while others remain accessible.

A defective HBA would likely result in total loss of SAN connectivity for Host B or major instability, making it unable to access LUNs 1-10 as well.