diff --git a/CHANGELOG.md b/CHANGELOG.md
index 959bee9..28f5fc8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.20.3] - 2025-06-25
+
+### Fixed
+
+- Fixed bugs when partitioning disks
+
 ## [0.20.2] - 2025-06-24
 
 ### Changed
diff --git a/ogclient/interfaceAdm/Configurar.py b/ogclient/interfaceAdm/Configurar.py
index b6fb12f..39f2308 100755
--- a/ogclient/interfaceAdm/Configurar.py
+++ b/ogclient/interfaceAdm/Configurar.py
@@ -159,7 +159,7 @@ if 'CACHE' in sparam:
 # Definir particionado.
 SystemLib.ogEcho (['session', 'log'], None, f'[50] {ogGlobals.lang.MSG_HELP_ogCreatePartitions}')
 SystemLib.ogEcho (['session', 'log'], None, f'   ogCreatePartitions {dis} {' '.join (tbp)}')
-res = SystemLib.ogExecAndLog ('command', [f'{ogGlobals.OGPYFUNCS}/ogCreatePartitions', dis] + tbp)
+res = SystemLib.ogExecAndLog ('command', [f'{ogGlobals.OGPYFUNCS}/ogCreatePartitions', str(dis)] + tbp)
 if not res:
     coproc.kill()
     SystemLib.ogRaiseError (['log', 'session'], ogGlobals.OG_ERR_GENERIC, f'ogCreatePartitions {dis} {' '.join (tbp)}')
@@ -177,9 +177,9 @@ for p in range (1, maxp+1):
             retval = SystemLib.ogExecAndLog ('command', [f'{ogGlobals.OGPYFUNCS}/ogFormatCache'])
     else:
         SystemLib.ogEcho (['session', 'log'], None, f'   ogFormatFs {dis} {p} {tbf[p]}')
-        retval = SystemLib.ogExecAndLog ('command', [f'{ogGlobals.OGPYFUNCS}/ogFormatFs', dis, str(p), tbf[p]])
-        if retval:
             coproc.kill()
+        retval = SystemLib.ogExecAndLog ('command', [f'{ogGlobals.OGPYFUNCS}/ogFormatFs', str(dis), str(p), tbf[p]])
+        if not retval:
             SystemLib.ogRaiseError (['session', 'log'], ogGlobals.OG_ERR_GENERIC, f'ogFormatFs  {dis} {p} {tbf[p]}')
             sys.exit (1)
 # Registro de fin de ejecución
diff --git a/ogclient/lib/python3/FileSystemLib.py b/ogclient/lib/python3/FileSystemLib.py
index 1067ddc..f3cd9a3 100644
--- a/ogclient/lib/python3/FileSystemLib.py
+++ b/ogclient/lib/python3/FileSystemLib.py
@@ -263,7 +263,7 @@ def ogFormatFs (disk, par, fs=None, label=None):
         errcode = ogGlobals.OG_ERR_PARTITION
 
     ogUnlock (disk, par)
-    return errcode
+    return not errcode      ## reverse to indicate success
 
 
 #/**
diff --git a/ogclient/scripts/updateCache.py b/ogclient/scripts/updateCache.py
index f0f7364..4d81517 100755
--- a/ogclient/scripts/updateCache.py
+++ b/ogclient/scripts/updateCache.py
@@ -143,7 +143,7 @@ if sizerequired >= cachesizefree:
         SystemLib.ogRaiseError ('session', ogGlobals.OG_ERR_CACHESIZE, 'CACHE')
         sys.exit (1)
 
-# Comprobamos que imagen cache igual a la del repo. Si sincronizada no podemos comprobar. 
+# Comprobamos que imagen cache igual a la del repo. Si sincronizada no podemos comprobar.
 rc = ProtocolLib.ogUpdateCacheIsNecesary (repositorio, path, protocolo)
 # si rc=True: actualizamos; si rc=False: no actualizamos (exit 0); si rc=None: exit error
 if   rc == True:  pass                                     ## es necesario actualizar