GiliSoft RAMDisk turns part of a computer’s physical memory into a drive that Windows can address by a letter. Programs can read and write folders on that drive as if it were ordinary storage, while the bytes actually remain in RAM. This is useful for browser caches, build output, preview caches, extracted working files, and other data that changes often and can be recreated. It does not increase installed memory or make every file on the computer faster. The chosen capacity leaves less RAM for Windows and active programs.
Memory becomes a drive
Creating a drive requires a capacity, an unused drive letter, and a filesystem. GiliSoft RAMDisk then mounts it in the same namespace as physical disks. An application sees a normal path and does not need special RAM-disk support. Moving an application’s cache there still requires changing that application’s cache setting or launch path; creating the drive alone does not redirect existing folders.
The capacity needs restraint. Allocating most of the installed memory can force Windows and large programs to compete for what remains. That pressure may increase paging to physical storage and erase the speed benefit that motivated the change. The useful size depends on the normal workload and the largest temporary set, not merely on the amount of RAM listed in the computer.
Temporary or saved
An empty RAM disk starts without files and loses its contents when its memory disappears. A restart, shutdown, drive removal, or certain failures can clear it. This behavior is desirable for disposable cache, but it makes the drive unsuitable as the only location for documents or source material. Copying a file to the RAM disk is not a backup.
GiliSoft RAMDisk can connect the virtual drive to an image file stored on permanent storage. It loads that image to restore a starting state and writes current contents back according to the selected save policy. Available policies cover normal restart or shutdown, sleep, periodic intervals, and more frequent synchronization. Persistence depends on the last successful image write. A sudden power loss can still discard changes made after that point.
An image also changes startup and shutdown work. Loading a large image reads it from physical storage before the RAM drive reaches its expected state. Saving one writes the contents back and can extend shutdown. Real-time or frequent saving preserves more changes but adds physical-disk writes, which may be the very activity that a temporary RAM disk was meant to avoid.
Paths must stay stable
The drive letter must remain free. A removable disk, mapped network share, or another local volume can claim the same letter and break an application’s stored cache path. GiliSoft RAMDisk can auto-load a known image, but it cannot make two devices use one letter at once. Choosing a high, otherwise unused letter reduces that conflict.
Applications also need the destination folder to exist when they start. If a browser launches before an image-backed RAM disk mounts, it may recreate its cache elsewhere or fail to use the configured path. A temporary disk needs its folder tree recreated after every empty start. An image can store that structure, while a startup task can create it for a deliberately disposable drive.
Removal discards data
Unmounting the drive returns its allocated memory to the system. GiliSoft RAMDisk cannot retain unsaved bytes after that point. Before removal, files that matter need a copy on permanent storage or a completed image save. The same rule applies before changing the drive capacity, because rebuilding the virtual disk can replace its current filesystem.
A fast benchmark does not prove that every workload benefits. Small temporary reads and repeated writes can gain from RAM latency. A task that constantly copies large source files into and out of the drive may spend its time on those transfers. The clearest use is data that an application produces locally, reads repeatedly, and can safely lose.
