diff -uNr linux-2.4.19.S1.sdm6.sgm4/drivers/scsi/scsi_scan.c linux-2.4.19.S1.sdm6.sgm4.largelun/drivers/scsi/scsi_scan.c
--- linux-2.4.19.S1.sdm6.sgm4/drivers/scsi/scsi_scan.c	Wed Aug  7 01:16:34 2002
+++ linux-2.4.19.S1.sdm6.sgm4.largelun/drivers/scsi/scsi_scan.c	Tue Aug 13 11:57:28 2002
@@ -196,11 +196,39 @@
 static unsigned int max_scsi_luns = 1;
 #endif
 
+#define MAX_LLUN_BLKLEN 8
+static int llun_blklst[3*MAX_LLUN_BLKLEN] = {
+	-1, -1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1 };
+
+static inline int is_on_llun_blklst (int hostno, int channel, int target)
+{
+	int i;
+	for (i = 0; i < MAX_LLUN_BLKLEN; ++i) {
+		if (llun_blklst[i*3] == -1)
+			break;
+		if (llun_blklst[i*3+0] == hostno &&
+		    llun_blklst[i*3+1] == channel &&
+		    llun_blklst[i*3+2] == target) {
+			printk (KERN_DEBUG "Found c%ib%it%i on llun_blklst\n",
+				hostno, channel, target);
+			return 1;
+		}
+	}
+	return 0;
+}
+
+
 #ifdef MODULE
 
 MODULE_PARM(max_scsi_luns, "i");
 MODULE_PARM_DESC(max_scsi_luns, "last scsi LUN (should be between 1 and 2^32-1)");
 
+MODULE_PARM(llun_blklst, "3-24i");
+MODULE_PARM_DESC(llun_blklst, "SCSI-2 devs (C,B,T) that need large luns support");
+				      
 #else
 
 static int __init scsi_luns_setup(char *str)
@@ -219,6 +247,30 @@
 
 __setup("max_scsi_luns=", scsi_luns_setup);
 
+static int __init llun_blklst_setup(char *str)
+{
+	unsigned int tmp;
+	int i = 0;
+	do {
+		int rc;
+		if (get_option(&str, &tmp) == 2)
+			llun_blklst[i++] = tmp;
+		else 
+			break;
+		if (get_option(&str, &tmp) == 2)
+			llun_blklst[i++] = tmp;
+		else 
+			break;
+		if ((rc = get_option(&str, &tmp)) >= 1)
+			llun_blklst[i++] = tmp;
+		if (rc != 2)
+			break;
+	} while (1);
+	return i;
+}
+
+__setup("llun_blklst=", llun_blklst_setup);
+
 #endif
 
 static void print_inquiry(unsigned char *data)
@@ -453,7 +505,8 @@
 							break;	/* break means don't probe further for luns!=0 */
 						if (SDpnt && (0 == lun)) {
 							int bflags = get_device_flags (scsi_result);
-							if (bflags & BLIST_LARGELUN)
+							if (bflags & BLIST_LARGELUN ||
+							    is_on_llun_blklst (shpnt->host_no, channel, order_dev))
 								lun0_sl = SCSI_3; /* treat as SCSI 3 */
 							else
 								lun0_sl = SDpnt->scsi_level;
@@ -609,7 +662,8 @@
 	 */
 	bflags = get_device_flags (scsi_result);
 
-	if (bflags & BLIST_SPARSELUN) {
+	if (bflags & BLIST_SPARSELUN ||
+	    is_on_llun_blklst (shpnt->host_no, channel, dev)) {
 	  *sparse_lun = 1;
 	}
 	/*
@@ -828,7 +882,8 @@
 	 * If this device is known to support sparse multiple units, override the
 	 * other settings, and scan all of them.
 	 */
-	if (bflags & BLIST_SPARSELUN) {
+	if (bflags & BLIST_SPARSELUN ||
+	    is_on_llun_blklst (shpnt->host_no, channel, dev)) {
 		*max_dev_lun = shpnt->max_lun;
 		*sparse_lun = 1;
 		return 1;