diff --git a/swiftonfile/swift/common/fs_utils.py b/swiftonfile/swift/common/fs_utils.py
index 6a220f8..be96d1d 100644
--- a/swiftonfile/swift/common/fs_utils.py
+++ b/swiftonfile/swift/common/fs_utils.py
@@ -65,7 +65,7 @@ def do_read(fd, n):
         buf = os.read(fd, n)
     except OSError as err:
         raise SwiftOnFileSystemOSError(
-            err.errno, '%s, os.write("%s", ...)' % (err.strerror, fd))
+            err.errno, '%s, os.read("%s", ...)' % (err.strerror, fd))
     return buf
 
 
@@ -247,7 +247,7 @@ def do_fdatasync(fd):
         do_fsync(fd)
     except OSError as err:
         raise SwiftOnFileSystemOSError(
-            err.errno, '%s, os.fsync("%s")' % (err.strerror, fd))
+            err.errno, '%s, os.fdatasync("%s")' % (err.strerror, fd))
 
 
 _posix_fadvise = None
@@ -267,7 +267,7 @@ def do_lseek(fd, pos, how):
         os.lseek(fd, pos, how)
     except OSError as err:
         raise SwiftOnFileSystemOSError(
-            err.errno, '%s, os.fsync("%s")' % (err.strerror, fd))
+            err.errno, '%s, os.lseek("%s")' % (err.strerror, fd))
 
 
 def get_filename_from_fd(fd, verify=False):
diff --git a/swiftonfile/swift/common/utils.py b/swiftonfile/swift/common/utils.py
index eeda8e9..ec5e007 100644
--- a/swiftonfile/swift/common/utils.py
+++ b/swiftonfile/swift/common/utils.py
@@ -96,7 +96,8 @@ def read_metadata(path_or_fd):
                 # Note that we don't touch the keys on errors fetching the
                 # data since it could be a transient state.
                 raise SwiftOnFileSystemIOError(
-                    err.errno, 'getxattr("%s", %s)' % (path_or_fd, key))
+                    err.errno, '%s, getxattr("%s", %s)' % (err.strerror,
+                                                           path_or_fd, key))
         else:
             try:
                 # If this key provides all or the remaining part of the pickle
@@ -143,7 +144,8 @@ def write_metadata(path_or_fd, metadata):
             else:
                 raise SwiftOnFileSystemIOError(
                     err.errno,
-                    'setxattr("%s", %s, metastr)' % (path_or_fd, key))
+                    '%s, setxattr("%s", %s, metastr)' % (err.strerror,
+                                                         path_or_fd, key))
         metastr = metastr[MAX_XATTR_SIZE:]
         key += 1
 
@@ -157,7 +159,8 @@ def clean_metadata(path_or_fd):
             if err.errno == errno.ENODATA:
                 break
             raise SwiftOnFileSystemIOError(
-                err.errno, 'removexattr("%s", %s)' % (path_or_fd, key))
+                err.errno, '%s, removexattr("%s", %s)' % (err.strerror,
+                                                          path_or_fd, key))
         key += 1