[volume.check.disk] skip errors and check next volumes

fix https://github.com/chrislusf/seaweedfs/issues/2129

weed/shell/command_volume_check_disk.go

@@ -89,6 +89,17 @@ func (c *commandVolumeCheckDisk) Do(args []string, commandEnv *CommandEnv, write
 				continue
 			}
 
+			if err := c.syncTwoReplicas(aDB, bDB, a, verbose, writer, b, err, applyChanges, nonRepairThreshold); err != nil {
+				fmt.Fprintf(writer, "snyc volume %d on %s and %s: %v\n", a.info.Id, a.location.dataNode.Id, b.location.dataNode.Id, err)
+			}
+			replicas = replicas[1:]
+		}
+	}
+
+	return nil
+}
+
+func (c *commandVolumeCheckDisk) syncTwoReplicas(aDB *needle_map.MemDb, bDB *needle_map.MemDb, a *VolumeReplica, verbose *bool, writer io.Writer, b *VolumeReplica, err error, applyChanges *bool, nonRepairThreshold *float64) error {
 	aHasChanges, bHasChanges := true, true
 	for aHasChanges || bHasChanges {
 		// reset index db
@@ -112,10 +123,6 @@ func (c *commandVolumeCheckDisk) Do(args []string, commandEnv *CommandEnv, write
 			return err
 		}
 	}
-			replicas = replicas[1:]
-		}
-	}
-
 	return nil
 }