diff --git a/fastboot/device/utility.cpp b/fastboot/device/utility.cpp
index 97b5ad4..3302c43 100644
--- a/fastboot/device/utility.cpp
+++ b/fastboot/device/utility.cpp
@@ -90,14 +90,7 @@
         return false;
     }
 
-    flags |= (O_EXCL | O_CLOEXEC | O_BINARY);
-    unique_fd fd(TEMP_FAILURE_RETRY(open(handle->path().c_str(), flags)));
-    if (fd < 0) {
-        PLOG(ERROR) << "Failed to open block device: " << handle->path();
-        return false;
-    }
-    handle->set_fd(std::move(fd));
-    return true;
+    return handle->Open(flags);
 }
 
 std::optional<std::string> FindPhysicalPartition(const std::string& name) {
diff --git a/fastboot/device/utility.h b/fastboot/device/utility.h
index 1d81b7a..6e1453f 100644
--- a/fastboot/device/utility.h
+++ b/fastboot/device/utility.h
@@ -18,6 +18,8 @@
 #include <optional>
 #include <string>
 
+#include <android-base/file.h>
+#include <android-base/logging.h>
 #include <android-base/unique_fd.h>
 #include <android/hardware/boot/1.0/IBootControl.h>
 #include <fstab/fstab.h>
@@ -44,11 +46,51 @@
     }
     const std::string& path() const { return path_; }
     int fd() const { return fd_.get(); }
-    void set_fd(android::base::unique_fd&& fd) { fd_ = std::move(fd); }
+    bool Open(int flags) {
+        flags |= (O_EXCL | O_CLOEXEC | O_BINARY);
 
+        // Attempts to open a second device can fail with EBUSY if the device is already open.
+        // Explicitly close any previously opened devices as unique_fd won't close them until
+        // after the attempt to open.
+        fd_.reset();
+
+        fd_ = android::base::unique_fd(TEMP_FAILURE_RETRY(open(path_.c_str(), flags)));
+        if (fd_ < 0) {
+            PLOG(ERROR) << "Failed to open block device: " << path_;
+            return false;
+        }
+        flags_ = flags;
+
+        return true;
+    }
+    bool Reset(int flags) {
+        if (fd_.ok() && (flags | O_EXCL | O_CLOEXEC | O_BINARY) == flags_) {
+            return true;
+        }
+
+        off_t offset = fd_.ok() ? lseek(fd_.get(), 0, SEEK_CUR) : 0;
+        if (offset < 0) {
+            PLOG(ERROR) << "Failed lseek on block device: " << path_;
+            return false;
+        }
+
+        sync();
+
+        if (Open(flags) == false) {
+            return false;
+        }
+
+        if (lseek(fd_.get(), offset, SEEK_SET) != offset) {
+            PLOG(ERROR) << "Failed lseek on block device: " << path_;
+            return false;
+        }
+
+        return true;
+    }
   private:
     std::string path_;
     android::base::unique_fd fd_;
+    int flags_;
     std::function<void()> closer_;
 };