File Systems and Data Store Catalog Items
The following table shows the File Systems and Data Store Catalog items in Platform Builder.
Catalog item name | Sysgen variable | Description | CompressionSYSGEN_NKCOMPRAn application programming interface (API) that compresses the data in the RAM and ROM file systems, as well as the database volumes. For more information about this Catalog item, seeFile Compression.Database SupportSYSGEN_FSDBASEAn API that provides built-in CEDB database support. For more information about this Catalog item, seeCEDB Database Support.Bit-basedSYSGEN_FSREPLBITA feature that helps identify what changes have occurred in a database or RAM file system on the device and therefore must be replicated on the desktop. This model relies on four bits per object to replicate the data. For more information about this Catalog item, see Bit-Based Replication.Count-basedSYSGEN_FSREPLCOUNTA feature that helps identify what changes have occurred in a database or RAM file system on the device and therefore must be replicated on the desktop. This model relies on aDWORD value that contains a counter identifying when a change occurred. For more information about this Catalog item, seeCount-Based Replication.RAM and ROM File SystemSYSGEN_FSRAMROMA file system driver capable of reading data from the ROM file system and the RAM file system in the object store. For more information about this Catalog item, seeSelecting the Internal File System for your Target Device.ROM-only File SystemSYSGEN_FSROMONLYA file system driver capable of reading data from the ROM file system. For more information about this Catalog item, seeSelecting the Internal File System for your Target Device.Hive-based RegistrySYSGEN_FSREGHIVEA registry system that stores data inside files, or hives, which can be kept on any file system. For more information about this Catalog item, seeHive-Based Registry.RAM-based RegistrySYSGEN_FSREGRAMA system that stores all registry data within the object store. For more information about this Catalog item, seeRAM-Based Registry.Storage ManagerSYSGEN_STOREMGRThe Storage Manager is responsible for all external storage items, such as file systems, file system filters, and partitioning. For more information about this Catalog item, seeStorage Manager.Binary Rom Image File SystemSYSGEN_BINFSA Catalog item that is used to load a portion of an OS image from persistent media into RAM for execution. This Catalog item uses demand paging to load additional modules as needed. For more information about this Catalog item, seeBinary Rom Image File System (BinFS).CD/UDFS File SystemSYSGEN_UDFSA file system driver that supports both Compact Disc File System (CDFS) and Universal Disc File System (UDFS) and reads compact discs (CDs), digital video discs (DVDs), and CD-ROMs. For more information about this Catalog item, see CD/UDFS File System.EDB Database EngineSYSGEN_EDBAn API that provides enhanced database functionality, including support for transactions, access by multiple users, multiple sort orders, key properties and databases. For more information about this Catalog item, seeEDB Database Support.FAT File SystemSYSGEN_FATFSA file system driver that supports the file allocation table (FAT) file system. For more information about this Catalog item, seeFAT File System.Partition DriverSYSGEN_MSPARTA driver that interprets the partitions on a storage device for the Partition Manager. For more information about this Catalog item, seePartition Driver.Storage Manager Control Panel AppletSYSGEN_STOREMGR_CPLA control panel application that allows a user to manipulate storage devices. For more information about this Catalog item, seeStorage Manager.Transaction-safe FAT File System (TFAT)SYSGEN_TFATA transaction-safe FAT file system that ensures the file allocation table is not corrupted during power cycles. For more information about this Catalog item, seeTransaction-Safe FAT File System.System PasswordSYSGEN_FSPASSWORDAn API that provides support for authentication on a device to prevent unauthorized access. For more information about this Catalog item, seeFile System Password Reference.The following table shows the File Systems and Data Store Sysgen variables that are not included in the Catalog.
SYSGEN variable | Description | SYSGEN_FSDMGRSets SYSGEN_STOREMGR = 1. For more information, see Storage Manager.SYSGEN_OEMFSSample persistent registry and password driver.SYSGEN_FATUTIL_NOUIBuilds the Fatutil.dll file for a device with no graphical user interface (GUI) components.
