diff --git a/brick/Makefile b/brick/Makefile
index 857f8dbd..5b53e41d 100644
--- a/brick/Makefile
+++ b/brick/Makefile
@@ -8,5 +8,5 @@ mod:
 uf2:
 	$(MAKE) -C uf2daemon
 	@mkdir -p bin
-	cp uf2daemon/server bin/uf2daemon
+	cp uf2daemon/server bin/uf2d
 
diff --git a/brick/ins b/brick/ins
index c1c3c35d..abeb7604 100755
--- a/brick/ins
+++ b/brick/ins
@@ -1,22 +1,9 @@
 #!/bin/sh
 set -ex
 cd /mnt/ramdisk/prjs/ko
+echo 3 > /proc/sys/kernel/printk
 insmod ./nbd.ko
 sleep 1
-./nbd-serv &
+./uf2d > /tmp/uf2d.log 2> /tmp/uf2derr.log
 sleep 1
 insmod ./d_usbdev.ko file=/dev/nbd0 HostStr=EV3 SerialStr=0016535543af
-L=/sys/devices/platform/musb_hdrc/gadget/lun0
-echo $L
-echo -n "ent: "
-read LINE
-#echo > $L/file
-echo 3 > $L/reset
-killall nbd-serv
-sleep 1
-./nbd-serv &
-sleep 1
-#echo /dev/nbd0 > $L/file
-#sleep 1
-echo 4 > $L/reset
-
diff --git a/brick/mk b/brick/mk
index ac3922a3..e6492cc1 100755
--- a/brick/mk
+++ b/brick/mk
@@ -1,6 +1,6 @@
 #!/bin/sh
 set -xe
-scp -qr * vm:linux/pxt/ 
+scp -qr kernel uf2daemon Makefile vm:linux/pxt/ 
 ssh vm "cd linux/pxt; make $1"
 mkdir -p bin
 scp vm:linux/pxt/bin/* bin/
diff --git a/brick/send b/brick/send
index ff9e6704..2bdc5f9a 100755
--- a/brick/send
+++ b/brick/send
@@ -3,6 +3,7 @@
 ./mk
 ev3duder up bin/d_usbdev.ko ../prjs/ko/d_usbdev.ko
 ev3duder up bin/nbd.ko ../prjs/ko/nbd.ko
-ev3duder up bin/nbd-serv ../prjs/ko/nbd-serv
 ev3duder up ins ../prjs/ko/ins
+ev3duder exec 'rm ../prjs/ko/uf2d'
+ev3duder up bin/uf2d ../prjs/ko/uf2d
 
diff --git a/brick/uf2daemon/fat.c b/brick/uf2daemon/fat.c
index 84f62065..5d794f02 100644
--- a/brick/uf2daemon/fat.c
+++ b/brick/uf2daemon/fat.c
@@ -666,21 +666,26 @@ void stopLMS() {
     closedir(dir);
 
     if (lmsPid) {
-        DBG("SIGSTOP to lmsPID=%d", lmsPid);
+        DBG("SIGSTOP to lmsPID=%d\n", lmsPid);
         kill(lmsPid, SIGSTOP);
+    } else {
+        DBG("LMS not found\n");
     }
 }
 
 void waitAndContinue() {
+    stopLMS();
     for (int fd = 3; fd < 9999; ++fd)
         close(fd);
     pid_t child = fork();
     if (child == 0) {
-        execl(elfPath, elfPath, "--msd");
+        DBG("start %s\n", elfPath);
+        execl(elfPath, elfPath, "--msd", (char*) NULL);
         exit(128);
     }
     int status;
     waitpid(child, &status, 0);
+    DBG("re-start LMS\n");
     if (lmsPid)
         kill(lmsPid, SIGCONT);
     exit(0);
diff --git a/brick/uf2daemon/main.c b/brick/uf2daemon/main.c
index aa42d62b..a8aba234 100644
--- a/brick/uf2daemon/main.c
+++ b/brick/uf2daemon/main.c
@@ -133,6 +133,7 @@ void runNBD() {
     reply.error = htonl(0);
 
     for (;;) {
+        nbd_ioctl(BLKFLSBUF, 0); // flush buffers - we don't want the kernel to cache the writes
         int nread = read(sock, &request, sizeof(request));
 
         if (nread < 0) {
@@ -199,7 +200,9 @@ int main() {
 
         if (!WIFEXITED(wstatus) || WEXITSTATUS(wstatus) != 0) {
             LOG("abnormal child return, %d", child);
-            sleep(3);
+            sleep(5);
+        } else {
+            sleep(2);
         }
     }