diff --git a/model/PrivateVolume.cpp b/model/PrivateVolume.cpp
index b2128a8..0f06c1f 100644
--- a/model/PrivateVolume.cpp
+++ b/model/PrivateVolume.cpp
@@ -45,6 +45,7 @@
 namespace vold {
 
 static const unsigned int kMajorBlockLoop = 7;
+static const unsigned int kMajorBlockHdd = 8;
 static const unsigned int kMajorBlockMmc = 179;
 
 PrivateVolume::PrivateVolume(dev_t device, const KeyBuffer& keyRaw)
@@ -218,6 +219,7 @@
         // give everyone else ext4 because sysfs rotational isn't reliable.
         // Additionally, prefer f2fs for loop-based devices
         if ((major(mRawDevice) == kMajorBlockMmc ||
+             major(mRawDevice) == kMajorBlockHdd ||
              major(mRawDevice) == kMajorBlockLoop ||
              IsVirtioBlkDevice(major(mRawDevice))) && f2fs::IsSupported()) {
             resolvedFsType = "f2fs";