diff --git a/CryptCommandListener.cpp b/CryptCommandListener.cpp
index 173be63..3132a82 100644
--- a/CryptCommandListener.cpp
+++ b/CryptCommandListener.cpp
@@ -147,26 +147,66 @@
         rc = cryptfs_crypto_complete();
     } else if (!strcmp(argv[1], "enablecrypto")) {
         const char* syntax = "Usage: cryptfs enablecrypto <wipe|inplace> "
-                             "default|password|pin|pattern [passwd]";
-        if ( (argc != 4 && argc != 5)
-             || (strcmp(argv[2], "wipe") && strcmp(argv[2], "inplace")) ) {
+                             "default|password|pin|pattern [passwd] [noui]";
+
+        // This should be replaced with a command line parser if more options
+        // are added
+        bool valid = true;
+        bool no_ui = false;
+        int type = CRYPT_TYPE_DEFAULT;
+        int options = 4; // Optional parameters are at this offset
+        if (argc < 4) {
+            // Minimum 4 parameters
+            valid = false;
+        } else if (strcmp(argv[2], "wipe") && strcmp(argv[2], "inplace") ) {
+            // Second parameter must be wipe or inplace
+            valid = false;
+        } else {
+            // Third parameter must be valid type
+            type = getType(argv[3]);
+            if (type == -1) {
+                valid = false;
+            } else if (type != CRYPT_TYPE_DEFAULT) {
+                options++;
+            }
+        }
+
+        if (valid) {
+            if(argc < options) {
+                // Too few parameters
+                valid = false;
+            } else if (argc == options) {
+                // No more, done
+            } else if (argc == options + 1) {
+                // One option, must be noui
+                if (!strcmp(argv[options], "noui")) {
+                    no_ui = true;
+                } else {
+                    valid = false;
+                }
+            } else {
+                // Too many options
+                valid = false;
+            }
+        }
+
+        if (!valid ) {
             cli->sendMsg(ResponseCode::CommandSyntaxError, syntax, false);
             return 0;
         }
+
         dumpArgs(argc, argv, 4);
 
         int tries;
         for (tries = 0; tries < 2; ++tries) {
-            int type = getType(argv[3]);
             if (type == -1) {
                 cli->sendMsg(ResponseCode::CommandSyntaxError, syntax,
                              false);
                 return 0;
             } else if (type == CRYPT_TYPE_DEFAULT) {
-              rc = cryptfs_enable_default(argv[2], /*allow_reboot*/false);
+              rc = cryptfs_enable_default(argv[2], no_ui);
             } else {
-                rc = cryptfs_enable(argv[2], type, argv[4],
-                                    /*allow_reboot*/false);
+                rc = cryptfs_enable(argv[2], type, argv[4], no_ui);
             }
 
             if (rc == 0) {
diff --git a/Disk.cpp b/Disk.cpp
index 1e76bee..d5f3e5d 100644
--- a/Disk.cpp
+++ b/Disk.cpp
@@ -340,10 +340,24 @@
 }
 
 status_t Disk::partitionPublic() {
+    int res;
+
     // TODO: improve this code
     destroyAllVolumes();
     mJustPartitioned = true;
 
+    // First nuke any existing partition table
+    std::vector<std::string> cmd;
+    cmd.push_back(kSgdiskPath);
+    cmd.push_back("--zap-all");
+    cmd.push_back(mDevPath);
+
+    // Zap sometimes returns an error when it actually succeeded, so
+    // just log as warning and keep rolling forward.
+    if ((res = ForkExecvp(cmd)) != 0) {
+        LOG(WARNING) << "Failed to zap; status " << res;
+    }
+
     struct disk_info dinfo;
     memset(&dinfo, 0, sizeof(dinfo));
 
diff --git a/EmulatedVolume.cpp b/EmulatedVolume.cpp
index 6e440cc..80ef3e2 100644
--- a/EmulatedVolume.cpp
+++ b/EmulatedVolume.cpp
@@ -113,6 +113,7 @@
         mFusePid = 0;
     }
 
+    KillProcessesUsingPath(getPath());
     ForceUnmount(mFuseDefault);
     ForceUnmount(mFuseRead);
     ForceUnmount(mFuseWrite);
diff --git a/Process.cpp b/Process.cpp
index a6f0cc6..962a460 100644
--- a/Process.cpp
+++ b/Process.cpp
@@ -177,13 +177,14 @@
 /*
  * Hunt down processes that have files open at the given mount point.
  */
-void Process::killProcessesWithOpenFiles(const char *path, int signal) {
-    DIR*    dir;
+int Process::killProcessesWithOpenFiles(const char *path, int signal) {
+    int count = 0;
+    DIR* dir;
     struct dirent* de;
 
     if (!(dir = opendir("/proc"))) {
         SLOGE("opendir failed (%s)", strerror(errno));
-        return;
+        return count;
     }
 
     while ((de = readdir(dir))) {
@@ -213,7 +214,9 @@
         if (signal != 0) {
             SLOGW("Sending %s to process %d", strsignal(signal), pid);
             kill(pid, signal);
+            count++;
         }
     }
     closedir(dir);
+    return count;
 }
diff --git a/Process.h b/Process.h
index 81b5f18..62a9313 100644
--- a/Process.h
+++ b/Process.h
@@ -21,7 +21,7 @@
 
 class Process {
 public:
-    static void killProcessesWithOpenFiles(const char *path, int signal);
+    static int killProcessesWithOpenFiles(const char *path, int signal);
     static int getPid(const char *s);
     static int checkSymLink(int pid, const char *path, const char *name);
     static int checkFileMaps(int pid, const char *path);
diff --git a/Utils.cpp b/Utils.cpp
index 2dd9ae8..d4618af 100644
--- a/Utils.cpp
+++ b/Utils.cpp
@@ -123,35 +123,57 @@
     if (!umount2(cpath, UMOUNT_NOFOLLOW) || errno == EINVAL || errno == ENOENT) {
         return OK;
     }
-    PLOG(WARNING) << "Failed to unmount " << path;
-
+    // Apps might still be handling eject request, so wait before
+    // we start sending signals
     sleep(5);
+
     Process::killProcessesWithOpenFiles(cpath, SIGINT);
-
+    sleep(5);
     if (!umount2(cpath, UMOUNT_NOFOLLOW) || errno == EINVAL || errno == ENOENT) {
         return OK;
     }
-    PLOG(WARNING) << "Failed to unmount " << path;
 
-    sleep(5);
     Process::killProcessesWithOpenFiles(cpath, SIGTERM);
-
-    if (!umount2(cpath, UMOUNT_NOFOLLOW) || errno == EINVAL || errno == ENOENT) {
-        return OK;
-    }
-    PLOG(WARNING) << "Failed to unmount " << path;
-
     sleep(5);
-    Process::killProcessesWithOpenFiles(cpath, SIGKILL);
-
     if (!umount2(cpath, UMOUNT_NOFOLLOW) || errno == EINVAL || errno == ENOENT) {
         return OK;
     }
-    PLOG(ERROR) << "Failed to unmount " << path;
+
+    Process::killProcessesWithOpenFiles(cpath, SIGKILL);
+    sleep(5);
+    if (!umount2(cpath, UMOUNT_NOFOLLOW) || errno == EINVAL || errno == ENOENT) {
+        return OK;
+    }
 
     return -errno;
 }
 
+status_t KillProcessesUsingPath(const std::string& path) {
+    const char* cpath = path.c_str();
+    if (Process::killProcessesWithOpenFiles(cpath, SIGINT) == 0) {
+        return OK;
+    }
+    sleep(5);
+
+    if (Process::killProcessesWithOpenFiles(cpath, SIGTERM) == 0) {
+        return OK;
+    }
+    sleep(5);
+
+    if (Process::killProcessesWithOpenFiles(cpath, SIGKILL) == 0) {
+        return OK;
+    }
+    sleep(5);
+
+    // Send SIGKILL a second time to determine if we've
+    // actually killed everyone with open files
+    if (Process::killProcessesWithOpenFiles(cpath, SIGKILL) == 0) {
+        return OK;
+    }
+    PLOG(ERROR) << "Failed to kill processes using " << path;
+    return -EBUSY;
+}
+
 status_t BindMount(const std::string& source, const std::string& target) {
     if (::mount(source.c_str(), target.c_str(), "", MS_BIND, NULL)) {
         PLOG(ERROR) << "Failed to bind mount " << source << " to " << target;
diff --git a/Utils.h b/Utils.h
index f33a379..228727a 100644
--- a/Utils.h
+++ b/Utils.h
@@ -49,6 +49,9 @@
 /* Really unmounts the path, killing active processes along the way */
 status_t ForceUnmount(const std::string& path);
 
+/* Kills any processes using given path */
+status_t KillProcessesUsingPath(const std::string& path);
+
 /* Creates bind mount from source to target */
 status_t BindMount(const std::string& source, const std::string& target);
 
diff --git a/cryptfs.c b/cryptfs.c
index 33fa19b..47acbc3 100644
--- a/cryptfs.c
+++ b/cryptfs.c
@@ -2901,7 +2901,7 @@
 }
 
 int cryptfs_enable_internal(char *howarg, int crypt_type, char *passwd,
-                            int allow_reboot)
+                            int no_ui)
 {
     int how = 0;
     char crypto_blkdev[MAXPATHLEN], real_blkdev[MAXPATHLEN];
@@ -3000,11 +3000,7 @@
 
     /* Now unmount the /data partition. */
     if (wait_and_unmount(DATA_MNT_POINT, false)) {
-        if (allow_reboot) {
-            goto error_shutting_down;
-        } else {
-            goto error_unencrypted;
-        }
+        goto error_unencrypted;
     }
 
     /* Do extra work for a better UX when doing the long inplace encryption */
@@ -3094,7 +3090,7 @@
         }
     }
 
-    if (how == CRYPTO_ENABLE_INPLACE) {
+    if (how == CRYPTO_ENABLE_INPLACE && !no_ui) {
         /* startup service classes main and late_start */
         property_set("vold.decrypt", "trigger_restart_min_framework");
         SLOGD("Just triggered restart_min_framework\n");
@@ -3231,15 +3227,15 @@
     return -1;
 }
 
-int cryptfs_enable(char *howarg, int type, char *passwd, int allow_reboot)
+int cryptfs_enable(char *howarg, int type, char *passwd, int no_ui)
 {
-    return cryptfs_enable_internal(howarg, type, passwd, allow_reboot);
+    return cryptfs_enable_internal(howarg, type, passwd, no_ui);
 }
 
-int cryptfs_enable_default(char *howarg, int allow_reboot)
+int cryptfs_enable_default(char *howarg, int no_ui)
 {
     return cryptfs_enable_internal(howarg, CRYPT_TYPE_DEFAULT,
-                          DEFAULT_PASSWORD, allow_reboot);
+                          DEFAULT_PASSWORD, no_ui);
 }
 
 int cryptfs_changepw(int crypt_type, const char *newpw)
diff --git a/cryptfs.h b/cryptfs.h
index 94684e2..fd6f3da 100644
--- a/cryptfs.h
+++ b/cryptfs.h
@@ -218,9 +218,9 @@
   int cryptfs_check_passwd(char *pw);
   int cryptfs_verify_passwd(char *newpw);
   int cryptfs_restart(void);
-  int cryptfs_enable(char *flag, int type, char *passwd, int allow_reboot);
+  int cryptfs_enable(char *flag, int type, char *passwd, int no_ui);
   int cryptfs_changepw(int type, const char *newpw);
-  int cryptfs_enable_default(char *flag, int allow_reboot);
+  int cryptfs_enable_default(char *flag, int no_ui);
   int cryptfs_setup_ext_volume(const char* label, const char* real_blkdev,
           const unsigned char* key, int keysize, char* out_crypto_blkdev);
   int cryptfs_revert_ext_volume(const char* label);
diff --git a/vdc.rc b/vdc.rc
index e842869..d5483d0 100644
--- a/vdc.rc
+++ b/vdc.rc
@@ -6,7 +6,7 @@
     # encryption) or trigger_restart_min_framework (other encryption)
 
 # One shot invocation to encrypt unencrypted volumes
-service encrypt /system/bin/vdc --wait cryptfs enablecrypto inplace default
+service encrypt /system/bin/vdc --wait cryptfs enablecrypto inplace default noui
     disabled
     oneshot
     # vold will set vold.decrypt to trigger_restart_framework (default