Problem
A DRAM-less SSD experiences inconsistent random-write latency when the project contains thousands of small cache and thumbnail files.
Solution
Root Cause / Diagnostic:
DRAM-less solid-state drives lack dedicated high-speed onboard memory to store the Flash Translation Layer (FTL) mapping table, relying instead on Host Memory Buffer (HMB) over PCIe. When handling tens of thousands of tiny timeline thumbnail, audio waveform, and cache files, the FTL lookup latency spikes drastically, causing severe timeline UI stuttering.
Actionable Fix:
1. DRAM-Equipped Drive Migration: Migrate active project caches and scratch disks to an NVMe SSD equipped with dedicated LPDDR4/DDR4 onboard cache (e.g., Samsung 980 Pro / 990 Pro, Kingston KC3000).
2. Cache Container Consolidation: Configure the NLE to bundle cache files into monolithic containers rather than writing loose individual frame files.
3. Random 4K IOPS Benchmark: Benchmark the drive's 4K random write IOPS using CrystalDiskMark (Q1T1); confirm low-queue-depth latency remains under 60 microseconds.
Pro Tip:
Never use budget DRAM-less SSDs for video editing scratch disks; video projects generate millions of tiny metadata lookups that bring DRAM-less drives to a complete crawl.
DRAM-less solid-state drives lack dedicated high-speed onboard memory to store the Flash Translation Layer (FTL) mapping table, relying instead on Host Memory Buffer (HMB) over PCIe. When handling tens of thousands of tiny timeline thumbnail, audio waveform, and cache files, the FTL lookup latency spikes drastically, causing severe timeline UI stuttering.
Actionable Fix:
1. DRAM-Equipped Drive Migration: Migrate active project caches and scratch disks to an NVMe SSD equipped with dedicated LPDDR4/DDR4 onboard cache (e.g., Samsung 980 Pro / 990 Pro, Kingston KC3000).
2. Cache Container Consolidation: Configure the NLE to bundle cache files into monolithic containers rather than writing loose individual frame files.
3. Random 4K IOPS Benchmark: Benchmark the drive's 4K random write IOPS using CrystalDiskMark (Q1T1); confirm low-queue-depth latency remains under 60 microseconds.
Pro Tip:
Never use budget DRAM-less SSDs for video editing scratch disks; video projects generate millions of tiny metadata lookups that bring DRAM-less drives to a complete crawl.