diff --git a/common/utils.cc b/common/utils.cc
index 34d97a2..3a234cb 100644
--- a/common/utils.cc
+++ b/common/utils.cc
@@ -83,49 +83,6 @@
 // The path to the kernel's boot_id.
 const char kBootIdPath[] = "/proc/sys/kernel/random/boot_id";
 
-// Return true if |disk_name| is an MTD or a UBI device. Note that this test is
-// simply based on the name of the device.
-bool IsMtdDeviceName(const string& disk_name) {
-  return base::StartsWith(
-             disk_name, "/dev/ubi", base::CompareCase::SENSITIVE) ||
-         base::StartsWith(disk_name, "/dev/mtd", base::CompareCase::SENSITIVE);
-}
-
-// Return the device name for the corresponding partition on a NAND device.
-// WARNING: This function returns device names that are not mountable.
-string MakeNandPartitionName(int partition_num) {
-  switch (partition_num) {
-    case 2:
-    case 4:
-    case 6: {
-      return base::StringPrintf("/dev/mtd%d", partition_num);
-    }
-    default: {
-      return base::StringPrintf("/dev/ubi%d_0", partition_num);
-    }
-  }
-}
-
-// Return the device name for the corresponding partition on a NAND device that
-// may be mountable (but may not be writable).
-string MakeNandPartitionNameForMount(int partition_num) {
-  switch (partition_num) {
-    case 2:
-    case 4:
-    case 6: {
-      return base::StringPrintf("/dev/mtd%d", partition_num);
-    }
-    case 3:
-    case 5:
-    case 7: {
-      return base::StringPrintf("/dev/ubiblock%d_0", partition_num);
-    }
-    default: {
-      return base::StringPrintf("/dev/ubi%d_0", partition_num);
-    }
-  }
-}
-
 // If |path| is absolute, or explicit relative to the current working directory,
 // leaves it as is. Otherwise, uses the system's temp directory, as defined by
 // base::GetTempDir() and prepends it to |path|. On success stores the full
@@ -473,22 +430,6 @@
     return false;
   }
 
-  size_t partition_name_len = string::npos;
-  if (partition_name[last_nondigit_pos] == '_') {
-    // NAND block devices have weird naming which could be something
-    // like "/dev/ubiblock2_0". We discard "_0" in such a case.
-    size_t prev_nondigit_pos =
-        partition_name.find_last_not_of("0123456789", last_nondigit_pos - 1);
-    if (prev_nondigit_pos == string::npos ||
-        (prev_nondigit_pos + 1) == last_nondigit_pos) {
-      LOG(ERROR) << "Unable to parse partition device name: " << partition_name;
-      return false;
-    }
-
-    partition_name_len = last_nondigit_pos - prev_nondigit_pos;
-    last_nondigit_pos = prev_nondigit_pos;
-  }
-
   if (out_disk_name) {
     // Special case for MMC devices which have the following naming scheme:
     // mmcblk0p2
@@ -501,8 +442,7 @@
   }
 
   if (out_partition_num) {
-    string partition_str =
-        partition_name.substr(last_nondigit_pos + 1, partition_name_len);
+    string partition_str = partition_name.substr(last_nondigit_pos + 1);
     *out_partition_num = atoi(partition_str.c_str());
   }
   return true;
@@ -519,13 +459,6 @@
     return string();
   }
 
-  if (IsMtdDeviceName(disk_name)) {
-    // Special case for UBI block devices.
-    //   1. ubiblock is not writable, we need to use plain "ubi".
-    //   2. There is a "_0" suffix.
-    return MakeNandPartitionName(partition_num);
-  }
-
   string partition_name = disk_name;
   if (isdigit(partition_name.back())) {
     // Special case for devices with names ending with a digit.
@@ -539,17 +472,6 @@
   return partition_name;
 }
 
-string MakePartitionNameForMount(const string& part_name) {
-  if (IsMtdDeviceName(part_name)) {
-    int partition_num;
-    if (!SplitPartitionName(part_name, nullptr, &partition_num)) {
-      return "";
-    }
-    return MakeNandPartitionNameForMount(partition_num);
-  }
-  return part_name;
-}
-
 string ErrnoNumberAsString(int err) {
   char buf[100];
   buf[0] = '\0';
@@ -566,33 +488,6 @@
   return lstat(path, &stbuf) == 0 && S_ISLNK(stbuf.st_mode) != 0;
 }
 
-bool TryAttachingUbiVolume(int volume_num, int timeout) {
-  const string volume_path = base::StringPrintf("/dev/ubi%d_0", volume_num);
-  if (FileExists(volume_path.c_str())) {
-    return true;
-  }
-
-  int exit_code;
-  vector<string> cmd = {"ubiattach",
-                        "-m",
-                        base::StringPrintf("%d", volume_num),
-                        "-d",
-                        base::StringPrintf("%d", volume_num)};
-  TEST_AND_RETURN_FALSE(Subprocess::SynchronousExec(cmd, &exit_code, nullptr));
-  TEST_AND_RETURN_FALSE(exit_code == 0);
-
-  cmd = {"ubiblock", "--create", volume_path};
-  TEST_AND_RETURN_FALSE(Subprocess::SynchronousExec(cmd, &exit_code, nullptr));
-  TEST_AND_RETURN_FALSE(exit_code == 0);
-
-  while (timeout > 0 && !FileExists(volume_path.c_str())) {
-    sleep(1);
-    timeout--;
-  }
-
-  return FileExists(volume_path.c_str());
-}
-
 bool MakeTempFile(const string& base_filename_template,
                   string* filename,
                   int* fd) {
diff --git a/common/utils.h b/common/utils.h
index 9160d9f..d949a3e 100644
--- a/common/utils.h
+++ b/common/utils.h
@@ -127,11 +127,6 @@
 // Returns true if |path| exists and is a symbolic link.
 bool IsSymlink(const char* path);
 
-// Try attaching UBI |volume_num|. If there is any error executing required
-// commands to attach the volume, this function returns false. This function
-// only returns true if "/dev/ubi%d_0" becomes available in |timeout| seconds.
-bool TryAttachingUbiVolume(int volume_num, int timeout);
-
 // If |base_filename_template| is neither absolute (starts with "/") nor
 // explicitly relative to the current working directory (starts with "./" or
 // "../"), then it is prepended the system's temporary directory. On success,
@@ -162,14 +157,6 @@
 // Returns empty string when invalid parameters are passed in
 std::string MakePartitionName(const std::string& disk_name, int partition_num);
 
-// Similar to "MakePartitionName" but returns a name that is suitable for
-// mounting. On NAND system we can write to "/dev/ubiX_0", which is what
-// MakePartitionName returns, but we cannot mount that device. To mount, we
-// have to use "/dev/ubiblockX_0" for rootfs. Stateful and OEM partitions are
-// mountable with "/dev/ubiX_0". The input is a partition device such as
-// /dev/sda3. Return empty string on error.
-std::string MakePartitionNameForMount(const std::string& part_name);
-
 // Set the read-only attribute on the block device |device| to the value passed
 // in |read_only|. Return whether the operation succeeded.
 bool SetBlockDeviceReadOnly(const std::string& device, bool read_only);
diff --git a/common/utils_unittest.cc b/common/utils_unittest.cc
index 7d1c59e..f9eb596 100644
--- a/common/utils_unittest.cc
+++ b/common/utils_unittest.cc
@@ -123,10 +123,6 @@
   EXPECT_EQ("/dev/mmcblk0", disk);
   EXPECT_EQ(3, part_num);
 
-  EXPECT_TRUE(utils::SplitPartitionName("/dev/ubiblock3_2", &disk, &part_num));
-  EXPECT_EQ("/dev/ubiblock", disk);
-  EXPECT_EQ(3, part_num);
-
   EXPECT_TRUE(utils::SplitPartitionName("/dev/loop10", &disk, &part_num));
   EXPECT_EQ("/dev/loop", disk);
   EXPECT_EQ(10, part_num);
@@ -135,14 +131,6 @@
   EXPECT_EQ("/dev/loop28", disk);
   EXPECT_EQ(11, part_num);
 
-  EXPECT_TRUE(utils::SplitPartitionName("/dev/loop10_0", &disk, &part_num));
-  EXPECT_EQ("/dev/loop", disk);
-  EXPECT_EQ(10, part_num);
-
-  EXPECT_TRUE(utils::SplitPartitionName("/dev/loop28p11_0", &disk, &part_num));
-  EXPECT_EQ("/dev/loop28", disk);
-  EXPECT_EQ(11, part_num);
-
   EXPECT_FALSE(utils::SplitPartitionName("/dev/mmcblk0p", &disk, &part_num));
   EXPECT_FALSE(utils::SplitPartitionName("/dev/sda", &disk, &part_num));
   EXPECT_FALSE(utils::SplitPartitionName("/dev/foo/bar", &disk, &part_num));
@@ -157,29 +145,6 @@
   EXPECT_EQ("/dev/mmcblk0p2", utils::MakePartitionName("/dev/mmcblk0", 2));
   EXPECT_EQ("/dev/loop8", utils::MakePartitionName("/dev/loop", 8));
   EXPECT_EQ("/dev/loop12p2", utils::MakePartitionName("/dev/loop12", 2));
-  EXPECT_EQ("/dev/ubi5_0", utils::MakePartitionName("/dev/ubiblock", 5));
-  EXPECT_EQ("/dev/mtd4", utils::MakePartitionName("/dev/ubiblock", 4));
-  EXPECT_EQ("/dev/ubi3_0", utils::MakePartitionName("/dev/ubiblock", 3));
-  EXPECT_EQ("/dev/mtd2", utils::MakePartitionName("/dev/ubiblock", 2));
-  EXPECT_EQ("/dev/ubi1_0", utils::MakePartitionName("/dev/ubiblock", 1));
-}
-
-TEST(UtilsTest, MakePartitionNameForMountTest) {
-  EXPECT_EQ("/dev/sda4", utils::MakePartitionNameForMount("/dev/sda4"));
-  EXPECT_EQ("/dev/sda123", utils::MakePartitionNameForMount("/dev/sda123"));
-  EXPECT_EQ("/dev/mmcblk2", utils::MakePartitionNameForMount("/dev/mmcblk2"));
-  EXPECT_EQ("/dev/mmcblk0p2",
-            utils::MakePartitionNameForMount("/dev/mmcblk0p2"));
-  EXPECT_EQ("/dev/loop0", utils::MakePartitionNameForMount("/dev/loop0"));
-  EXPECT_EQ("/dev/loop8", utils::MakePartitionNameForMount("/dev/loop8"));
-  EXPECT_EQ("/dev/loop12p2", utils::MakePartitionNameForMount("/dev/loop12p2"));
-  EXPECT_EQ("/dev/ubiblock5_0",
-            utils::MakePartitionNameForMount("/dev/ubiblock5_0"));
-  EXPECT_EQ("/dev/mtd4", utils::MakePartitionNameForMount("/dev/ubi4_0"));
-  EXPECT_EQ("/dev/ubiblock3_0",
-            utils::MakePartitionNameForMount("/dev/ubiblock3"));
-  EXPECT_EQ("/dev/mtd2", utils::MakePartitionNameForMount("/dev/ubi2"));
-  EXPECT_EQ("/dev/ubi1_0", utils::MakePartitionNameForMount("/dev/ubiblock1"));
 }
 
 TEST(UtilsTest, FuzzIntTest) {