diff --git a/pkg/dockerregistry/server/metrics/errorcodes.go b/pkg/dockerregistry/server/metrics/errorcodes.go
index 1391a84b3..4f8c46517 100644
--- a/pkg/dockerregistry/server/metrics/errorcodes.go
+++ b/pkg/dockerregistry/server/metrics/errorcodes.go
@@ -1,13 +1,33 @@
 package metrics
 
-import storagedriver "github.com/distribution/distribution/v3/registry/storage/driver"
+import (
+	"errors"
+	"io/fs"
+	"syscall"
+
+	storagedriver "github.com/distribution/distribution/v3/registry/storage/driver"
+)
 
 const (
 	errCodeUnsupportedMethod = "UNSUPPORTED_METHOD"
 	errCodePathNotFound      = "PATH_NOT_FOUND"
 	errCodeInvalidPath       = "INVALID_PATH"
 	errCodeInvalidOffset     = "INVALID_OFFSET"
+	errCodeReadOnlyFS        = "READ_ONLY_FILESYSTEM"
+	errCodeFileTooLarge      = "FILE_TOO_LARGE"
+	errCodeDeviceOutOfSpace  = "DEVICE_OUT_OF_SPACE"
 	errCodeUnknown           = "UNKNOWN"
+
+	// errnoEFBIG represents a file too large error.
+	// See `man errno` for more.
+	errnoEFBIG = 27
+	// errnoENOSPC represents a device out of space error.
+	// See `man errno` for more.
+	errnoENOSPC = 28
+	// errnoEROFS represents the syscall error number returned when an attempt
+	// to write to a read-only filesystem was made.
+	// See `man errno` for more.
+	errnoEROFS = 30
 )
 
 func storageErrorCode(err error) string {
@@ -20,7 +40,38 @@ func storageErrorCode(err error) string {
 		return errCodeInvalidPath
 	case storagedriver.InvalidOffsetError:
 		return errCodeInvalidOffset
+	case storagedriver.Error:
+		var perr *fs.PathError
+		if !errors.As(actual.Enclosed, &perr) {
+			return errCodeUnknown
+		}
+		unwrapped := perr.Unwrap()
+		if unwrapped == nil {
+			return errCodeUnknown
+		}
+		errno, ok := unwrapped.(syscall.Errno)
+		if !ok {
+			return errCodeUnknown
+		}
+		return syscallErrnoToErrorCode(errno)
+
 	}
 
 	return errCodeUnknown
 }
+
+// syscallErrnoToErrorCode transforms the errno in an unwrapped fs.PathErr into
+// a storage error code used to report metrics.
+//
+// if the given errno is not known to us, return errCodeUnknown.
+func syscallErrnoToErrorCode(errno syscall.Errno) string {
+	switch errno {
+	case errnoEROFS:
+		return errCodeReadOnlyFS
+	case errnoEFBIG:
+		return errCodeFileTooLarge
+	case errnoENOSPC:
+		return errCodeDeviceOutOfSpace
+	}
+	return errCodeUnknown
+}