Index: 1.0.0.rc14/lib/format/ataraid/pdc.c
===================================================================
--- 1.0.0.rc14.orig/lib/format/ataraid/pdc.c
+++ 1.0.0.rc14/lib/format/ataraid/pdc.c
@@ -155,6 +155,21 @@ static void *pdc_read_metadata(struct li
 			}
 		}
 
+		/* Some pdc card detect only PDC_MAX_SECTOR sectors, even
+		 * if the disk is bigger, this prevents dmraid from discovering
+		 * the metadata. This quirk searches for metadata at the
+		 * sector PDC_MAX_SECTOR
+		 */
+		if (di->sectors >= PDC_MAX_SECTOR) {
+			if (read_file(lc, handler, di->path, ret, sizeof(*ret),
+				      PDC_MAX_SECTOR << 9) &&
+			    !strncmp((const char*) ret->promise_id, PDC_MAGIC,
+				     PDC_ID_LENGTH)) {
+				info->u32 = PDC_MAX_SECTOR;
+				return (void*) ret;
+			}
+		}
+
 		dbg_free(ret);
 	}
 
Index: 1.0.0.rc14/lib/format/ataraid/pdc.h
===================================================================
--- 1.0.0.rc14.orig/lib/format/ataraid/pdc.h
+++ 1.0.0.rc14/lib/format/ataraid/pdc.h
@@ -16,6 +16,9 @@
 #define PDC_CONFIGOFFSETS	63,255,256,16,399,735
 #define	PDC_DATAOFFSET 0
 
+/* maximum device size (sectors) which can be detected by some pdc card */
+#define PDC_MAX_SECTOR 268435377UL
+
 /* Ondisk metadata for Promise Fastrack */
 struct pdc {
 #define PDC_ID_LENGTH	24