Problem
A shingled magnetic recording HDD suffers severe write-performance collapse during frequent metadata-heavy project updates, making it unsuitable for the chosen cache workload.
Solution
Root Cause / Diagnostic:
SMR (Shingled Magnetic Recording) hard drives overlap physical magnetic data tracks to maximize platter density. Modifying small metadata files or updating project database files requires the drive to read, buffer, and rewrite entire overlapping bands of adjacent tracks, causing write speeds to plummet from 150MB/s to under 5MB/s.
Actionable Fix:
1. Storage Tier Replacement: Replace SMR drives in production arrays with CMR (Conventional Magnetic Recording) enterprise drives (e.g., WD Red Pro, Seagate IronWolf Pro) or NVMe SSDs.
2. SMR Drive Demotion: Relegate existing SMR drives strictly to cold, sequential, write-once archiving where data is never modified or overwritten.
3. Write Speed Verification: Execute a continuous 50GB random write test with CrystalDiskMark to confirm write speeds do not collapse below 100MB/s under repeated write updates.
Pro Tip:
Always verify that any mechanical hard drive bought for video editing or NAS storage explicitly uses CMR (Conventional Magnetic Recording); SMR drives are catastrophic for editing workloads.
SMR (Shingled Magnetic Recording) hard drives overlap physical magnetic data tracks to maximize platter density. Modifying small metadata files or updating project database files requires the drive to read, buffer, and rewrite entire overlapping bands of adjacent tracks, causing write speeds to plummet from 150MB/s to under 5MB/s.
Actionable Fix:
1. Storage Tier Replacement: Replace SMR drives in production arrays with CMR (Conventional Magnetic Recording) enterprise drives (e.g., WD Red Pro, Seagate IronWolf Pro) or NVMe SSDs.
2. SMR Drive Demotion: Relegate existing SMR drives strictly to cold, sequential, write-once archiving where data is never modified or overwritten.
3. Write Speed Verification: Execute a continuous 50GB random write test with CrystalDiskMark to confirm write speeds do not collapse below 100MB/s under repeated write updates.
Pro Tip:
Always verify that any mechanical hard drive bought for video editing or NAS storage explicitly uses CMR (Conventional Magnetic Recording); SMR drives are catastrophic for editing workloads.