QLC SSD vs HDD sequential read, with random-read latency of ~110 µs vs ~11–12 ms
~7 GB/s vs ~300 MB/sobserved
| Value kind | observed — Reported measurements, counts, and specifications keep the precision and scope stated by their source; an exact specification is not treated as a range. |
|---|---|
| Scope | Solidigm D5-P5336 (Gen4 QLC) against Seagate Exos X20, from Solidigm's comparison table. The table lists the HDD's 4.16 ms average rotational latency; a random read also pays a seek, which brings it to about 11–12 ms. Newer Gen5 QLC drives read faster. |
| As of | 2025 |
| Source | Solidigm / Meta Engineering QLC case · Table 2: HDD 285 MB/s and 4.16 ms; D5-P5336 QLC SSD 7,000 MB/s and 110/31 µs read/write latency |
| Review | checking…review by 2027-04-16 · standard cadence |
| Recorded changes | last 2026-06-29 |
| Claim id | qlc-ssd-vs-hdd-sequential-read-20-100-s-vs-4-ms |
Where the guide uses it
← Full numbers register — every date-stamped figure in the guide, with revision history.