Ignore media not-present errors during DV. This caused DV to fail

on some tape and cdrom devices.

drivers/scsi/aic7xxx/aiclib.c

@@ -541,12 +541,18 @@ static struct asc_table_entry asc_table[] = {
 			"Rounded parameter") },
 /* DTL WRSOMCAE */{SST(0x39, 0x00, SS_RDEF,
 			"Saving parameters not supported") },
-/* DTL WRSOM    */{SST(0x3A, 0x00, SS_FATAL|ENXIO,
+/* DTL WRSOM    */{SST(0x3A, 0x00, SS_NOP,
 			"Medium not present") },
-/* DT  WR OM    */{SST(0x3A, 0x01, SS_FATAL|ENXIO,
+/* DT  WR OM    */{SST(0x3A, 0x01, SS_NOP,
 			"Medium not present - tray closed") },
-/* DT  WR OM    */{SST(0x3A, 0x02, SS_FATAL|ENXIO,
+/* DT  WR OM    */{SST(0x3A, 0x01, SS_NOP,
 			"Medium not present - tray open") },
+/* DT  WR OM    */{SST(0x3A, 0x03, SS_NOP,
+			"Medium not present - Loadable") },
+/* DT  WR OM    */{SST(0x3A, 0x04, SS_NOP,
+			"Medium not present - medium auxiliary "
+			"memory accessible") },
+/* DT  WR OM    */{SST(0x3A, 0xFF, SS_NOP, NULL) },/* Range 0x05->0xFF */
 /*  TL          */{SST(0x3B, 0x00, SS_RDEF,
 			"Sequential positioning error") },
 /*  T           */{SST(0x3B, 0x01, SS_RDEF,