Patch to read/write TiVo disks, which I used when my Maxtor started to throw
bad blocks. There is no need to do any "byteswapping" in the IDE subsystem.

[root@lembas tivo]# echo noop > /sys/block/uba/queue/scheduler
[root@lembas tivo]# echo 32 > /sys/block/uba/queue/read_ahead_kb
[root@lembas tivo]# dd_rescue -B 4k /dev/uba9 /dev/ubb9

diff -urp -X dontdiff linux-2.6.16-rc5/fs/partitions/mac.c linux-2.6.16-rc5-lem/fs/partitions/mac.c
--- linux-2.6.16-rc5/fs/partitions/mac.c	2005-06-17 12:48:29.000000000 -0700
+++ linux-2.6.16-rc5-lem/fs/partitions/mac.c	2006-03-10 13:31:02.000000000 -0800
@@ -45,11 +45,14 @@ int mac_partition(struct parsed_partitio
 	md = (struct mac_driver_desc *) read_dev_sector(bdev, 0, &sect);
 	if (!md)
 		return -1;
-	if (be16_to_cpu(md->signature) != MAC_DRIVER_MAGIC) {
+	if (be16_to_cpu(md->signature) == MAC_DRIVER_MAGIC) {
+		secsize = be16_to_cpu(md->block_size);
+	} else if (be16_to_cpu(md->signature) == TIVO_BOOT_MAGIC) {
+		secsize = 512;
+	} else {
 		put_dev_sector(sect);
 		return 0;
 	}
-	secsize = be16_to_cpu(md->block_size);
 	put_dev_sector(sect);
 	data = read_dev_sector(bdev, secsize/512, &sect);
 	if (!data)
diff -urp -X dontdiff linux-2.6.16-rc5/fs/partitions/mac.h linux-2.6.16-rc5-lem/fs/partitions/mac.h
--- linux-2.6.16-rc5/fs/partitions/mac.h	2005-06-17 12:48:29.000000000 -0700
+++ linux-2.6.16-rc5-lem/fs/partitions/mac.h	2006-03-10 12:42:03.000000000 -0800
@@ -32,6 +32,7 @@ struct mac_partition {
 #define MAC_STATUS_BOOTABLE	8	/* partition is bootable */
 
 #define MAC_DRIVER_MAGIC	0x4552
+#define TIVO_BOOT_MAGIC		0x1492
 
 /* Driver descriptor structure, in block 0 */
 struct mac_driver_desc {
diff -urp -X dontdiff linux-2.6.16-rc5/drivers/block/ub.c linux-2.6.16-rc5-lem/drivers/block/ub.c
--- linux-2.6.16-rc5/drivers/block/ub.c	2006-02-26 23:03:55.000000000 -0800
+++ linux-2.6.16-rc5-lem/drivers/block/ub.c	2006-03-10 13:51:03.000000000 -0800
@@ -114,7 +113,7 @@
 /*
  */
 
-#define UB_PARTS_PER_LUN      8
+#define UB_PARTS_PER_LUN     16
 
 #define UB_MAX_CDB_SIZE      16		/* Corresponds to Bulk */