These are likely due to bad installation media:
Oct 24 18:05:36 kernel: [ 6.572003] Buffer I/O error on device sr0, logical block 325772 Oct 24 18:05:36 kernel: [ 6.836004] sr 0:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE,SUGGEST_OK Oct 24 18:05:36 kernel: [ 6.836004] sr 0:0:0:0: [sr0] Sense Key : Medium Error [current] Oct 24 18:05:36 kernel: [ 6.836004] sr 0:0:0:0: [sr0] Add. Sense: L-EC uncorrectable error
These are likely due to bad installation media:
Oct 24 18:05:36 kernel: [ 6.572003] Buffer I/O error on device sr0, logical block 325772 DRIVER_ SENSE,SUGGEST_ OK
Oct 24 18:05:36 kernel: [ 6.836004] sr 0:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=
Oct 24 18:05:36 kernel: [ 6.836004] sr 0:0:0:0: [sr0] Sense Key : Medium Error [current]
Oct 24 18:05:36 kernel: [ 6.836004] sr 0:0:0:0: [sr0] Add. Sense: L-EC uncorrectable error