--- serverworks.c	2002-08-02 17:39:44.000000000 -0700
+++ /home/duncan/cvs/linux-2.4/drivers/ide/serverworks.c	2003-04-23 16:37:45.000000000 -0700
@@ -100,6 +100,12 @@
 #include <linux/stat.h>
 #include <linux/proc_fs.h>
 
+const char *bad_ata100[] = {
+	"ST340016A",
+	"ST380021A",
+	NULL
+};
+
 static struct pci_dev *bmide_dev;
 static byte svwks_revision = 0;
 
@@ -107,6 +113,14 @@
 extern int (*svwks_display_info)(char *, char **, off_t, int); /* ide-proc.c */
 extern char *ide_media_verbose(ide_drive_t *);
 
+static int check_in_drive_lists (ide_drive_t *drive, const char **list)
+{
+	while (*list)
+		if (!strcmp(*list++, drive->id->model))
+			return 1;
+	return 0;
+}
+
 static int svwks_get_info (char *buffer, char **addr, off_t offset, int count)
 {
 	char *p = buffer;
@@ -420,7 +434,8 @@
 	int ultra100 	= (ultra66 && svwks_revision >= SVWKS_CSB5_REVISION_NEW) ? 1 : 0;
 	byte speed;
 
-	if ((id->dma_ultra & 0x0020) && (udma_66) && (ultra100)) {
+	if ((id->dma_ultra & 0x0020) && (udma_66) && (ultra100) &&
+	    !check_in_drive_lists(drive, bad_ata100)) {
 		speed = XFER_UDMA_5;
 	} else if (id->dma_ultra & 0x0010) {
 		speed = ((udma_66) && (ultra66)) ? XFER_UDMA_4 : XFER_UDMA_2;