File Systems RAM Consumption Calculator

Help Instructions

Device/System Information:
  • Device Type - flash type (for NAND, if TargetNDM used, select NAND NDM)
  • FILENAME_MAX - system wide maximum file name length
  • FOPEN_MAX - system wide maximum number of open files
  • Number of Blocks - device number of blocks
  • Block Size - device block size in kilobytes
  • Page Size - device page size in bytes
  • Max. Bad Blocks - maximum number of bad blocks on device (NAND devices only)
Volume Information:
  • Volume Type - selects type of volume (FFS, FAT, ZFS). For SD/MMC/CF, only FAT is available
  • Volume Number of Blocks - number of blocks for this volume
  • Volume FOPEN_MAX - volume maximum number of open files (if 0, defaults to system wide value)
  • Avg. Number of Files/Dirs - Average number of files/directories on volume (FFS and ZFS only)
  • Avg. File/Dir Name Length - Average file length in bytes on volume (FFS and ZFS only)
  • FTL Driver 'part_bytes' - FTL per block partition bytes - the bigger this value, the faster the FTL lookup is on a page miss(FAT with flash FTL only)
  • FTL Driver 'map_size' - FTL number of RAM page mappings - if all pages are mapped in RAM, FTL lookups are instantaneous (FAT with flash FTL only) - setting this to 0 or bigger than volume pages maps all pages in RAM
  • FTL Driver 'cached_pages' - FTL NDM number of cached map pages - a map page contains virtual to physical mappings - the higher this number the better performance - typical values between 1 and 10
  • FAT Cluster Size - FAT cluster size in bytes. If 'Automatic', TargetFAT selects optimal value (FAT only)
  • FAT type - FAT type. If 'Automatic', TargetFAT selects optimal value (FAT only)
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Device/System Information
Device Type:
FILENAME_MAX:
System FOPEN_MAX:
Number of Blocks:
Block Size(KB):
Page Size(B):
Max. Bad Blocks:
Add Volume Compute RAM
Volumes RAM: 0 KB
System RAM: 0 KB
Total RAM: 0 KB
Embedded File Systems: Flash File System for NAND NOR flash, DOS Windows FAT file system, Flash Translation Layer FTL NAND NOR, Compressed Static File System