if (!$this->__active && $this->__init && !is_writable($this->settings['path'])) {
            $this->__init = false;
            trigger_error(sprintf(__('%s is not writable', true), $this->settings['path']), E_USER_WARNING);

FileEngine::__active() - CORE/cake/libs/cache/file.php, line 262
FileEngine::init() - CORE/cake/libs/cache/file.php, line 100
Cache::engine() - CORE/cake/libs/cache.php, line 154
Cache::config() - CORE/cake/libs/cache.php, line 126
include - APP/config/core.php, line 254
Configure::__loadBootstrap() - CORE/cake/libs/configure.php, line 638
Configure::getInstance() - CORE/cake/libs/configure.php, line 137
include - CORE/cake/bootstrap.php, line 47
[main] - APP/webroot/index.php, line 81

$sql	=	"DESCRIBE `articles`"
$error	=	"1: Can't create/write to file '/tmp/#sql_18d_0.MAI' (Errcode: 30 "Read-only file system")"
$out	=	null

            $out = null;
            if ($error) {
                trigger_error("<span style = \"color:Red;text-align:left\"><b>SQL Error:</b> {$this->error}</span>", E_USER_WARNING);

DboSource::showQuery() - CORE/cake/libs/model/datasources/dbo_source.php, line 527
DboSource::execute() - CORE/cake/libs/model/datasources/dbo_source.php, line 203
DboSource::fetchAll() - CORE/cake/libs/model/datasources/dbo_source.php, line 338
DboSource::query() - CORE/cake/libs/model/datasources/dbo_source.php, line 222
DboMysqlBase::describe() - CORE/cake/libs/model/datasources/dbo/dbo_mysql.php, line 100
Model::schema() - CORE/cake/libs/model/model.php, line 930
Model::setSource() - CORE/cake/libs/model/model.php, line 785
Model::__construct() - CORE/cake/libs/model/model.php, line 439
ClassRegistry::init() - CORE/cake/libs/class_registry.php, line 140
Controller::loadModel() - CORE/cake/libs/controller/controller.php, line 510
Controller::constructClasses() - CORE/cake/libs/controller/controller.php, line 455
Dispatcher::_invoke() - CORE/cake/dispatcher.php, line 207
Dispatcher::dispatch() - CORE/cake/dispatcher.php, line 194
[main] - APP/webroot/index.php, line 88

$model	=	Article
Article::$name = "Article"
Article::$useDbConfig = "default"
Article::$useTable = "articles"
Article::$displayField = NULL
Article::$id = "11"
Article::$data = array
Article::$table = "articles"
Article::$primaryKey = "id"
Article::$_schema = NULL
Article::$validate = array
Article::$validationErrors = array
Article::$tablePrefix = ""
Article::$alias = "Article"
Article::$tableToModel = array
Article::$logTransactions = false
Article::$transactional = false
Article::$cacheQueries = false
Article::$belongsTo = array
Article::$hasOne = array
Article::$hasMany = array
Article::$hasAndBelongsToMany = array
Article::$actsAs = NULL
Article::$Behaviors = BehaviorCollection object
Article::$whitelist = array
Article::$cacheSources = true
Article::$findQueryType = NULL
Article::$recursive = 1
Article::$order = NULL
Article::$__exists = NULL
Article::$__associationKeys = array
Article::$__associations = array
Article::$__backAssociation = array
Article::$__insertID = NULL
Article::$__numRows = NULL
Article::$__affectedRows = NULL
Article::$_findMethods = array
Article::$_log = NULL
$cache	=	null
$fields	=	false
$cols	=	false

        $cols = $this->query('DESCRIBE ' . $this->fullTableName($model));

        foreach ($cols as $column) {

DboMysqlBase::describe() - CORE/cake/libs/model/datasources/dbo/dbo_mysql.php, line 102
Model::schema() - CORE/cake/libs/model/model.php, line 930
Model::setSource() - CORE/cake/libs/model/model.php, line 785
Model::__construct() - CORE/cake/libs/model/model.php, line 439
ClassRegistry::init() - CORE/cake/libs/class_registry.php, line 140
Controller::loadModel() - CORE/cake/libs/controller/controller.php, line 510
Controller::constructClasses() - CORE/cake/libs/controller/controller.php, line 455
Dispatcher::_invoke() - CORE/cake/dispatcher.php, line 207
Dispatcher::dispatch() - CORE/cake/dispatcher.php, line 194
[main] - APP/webroot/index.php, line 88