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66408ff68f
Comprehensive benchmark of Samsung PM9A1 NVMe SSD before firmware update from GXA7401Q to GXA7802Q. Includes SMART health, hdparm, and fio results (seq/rand read/write, 4K blocks, iodepth=32).
113 lines
2.7 KiB
Markdown
113 lines
2.7 KiB
Markdown
# NVMe Benchmark: Pre-Firmware Update (GXA7401Q)
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> **Date**: 2026-04-02 10:35 CET
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> **Device**: Samsung PM9A1 (MZVL2512HCJQ-00B00), 512GB
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> **Serial**: S675NF0R703667
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> **Firmware**: GXA7401Q (pre-update)
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> **OS**: Manjaro Linux, kernel 6.12, KDE 6.5.6
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> **NVMe slot**: /dev/nvme0n1 (root drive)
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## SMART Health Data
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| Metric | Value |
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|--------|-------|
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| Critical Warning | 0 (healthy) |
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| Temperature | 51°C (Sensor 2: 64°C) |
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| Available Spare | 100% |
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| Available Spare Threshold | 10% |
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| Percentage Used | 19% |
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| Data Units Read | 17.97 TB |
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| Data Units Written | 94.19 TB |
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| Host Read Commands | 683,328,216 |
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| Host Write Commands | 1,651,377,088 |
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| Controller Busy Time | 9,265 min |
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| Power Cycles | 884 |
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| Power On Hours | 4,926 h (~205 days) |
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| Unsafe Shutdowns | 88 |
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| Media Errors | 0 |
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| Error Log Entries | 0 |
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## hdparm Results
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| Test | Throughput |
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|------|-----------|
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| Cached Reads | 7,349.97 MB/sec |
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| Buffered Disk Reads | 741.99 MB/sec |
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## fio Benchmarks (4K block, libaio, iodepth=32, 30s per test)
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### Sequential Read
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| Metric | Value |
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|--------|-------|
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| Bandwidth | 1,554 MiB/s (1,630 MB/s) |
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| IOPS | 398,000 |
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| Avg Latency | 80.16 µs |
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| P99 Latency | 128 µs |
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| P99.9 Latency | 186 µs |
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### Sequential Write
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| Metric | Value |
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|--------|-------|
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| Bandwidth | 1,305 MiB/s (1,368 MB/s) |
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| IOPS | 334,000 |
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| Avg Latency | 95.53 µs |
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| P99 Latency | 163 µs |
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| P99.9 Latency | 255 µs |
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### Random Read
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| Metric | Value |
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|--------|-------|
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| Bandwidth | 1,409 MiB/s (1,477 MB/s) |
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| IOPS | 361,000 |
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| Avg Latency | 88.42 µs |
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| P99 Latency | 141 µs |
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| P99.9 Latency | 200 µs |
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### Random Write
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| Metric | Value |
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|--------|-------|
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| Bandwidth | 1,135 MiB/s (1,190 MB/s) |
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| IOPS | 291,000 |
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| Avg Latency | 109.78 µs |
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| P99 Latency | 190 µs |
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| P99.9 Latency | 334 µs |
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### Random Read/Write (70/30)
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| Metric | Read | Write |
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|--------|------|-------|
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| Bandwidth | 919 MiB/s (964 MB/s) | 394 MiB/s (413 MB/s) |
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| IOPS | 235,000 | 101,000 |
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| Avg Latency | 94.72 µs | 95.05 µs |
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| P99 Latency | 149 µs | 149 µs |
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## Test Configuration
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```text
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fio-3.41
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Block size: 4096B
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IO Engine: libaio
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IO Depth: 32
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Direct IO: yes
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Runtime: 30s per test
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File size: 1GiB
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Directory: /tmp (on NVMe root drive)
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```
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## Assessment
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- Drive health is good: 0 media errors, 0 error log entries, 100% spare
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- 19% endurance used after ~205 days powered on (within normal range)
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- Sequential performance consistent with PCIe 4.0 x4 NVMe expectations
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- Random IOPS strong for a client-grade TLC SSD
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- Temperature under load: 51-64°C (well within spec)
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## Next Steps
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- Apply firmware update to GXA7802Q
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- Re-run identical benchmarks post-update
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- Compare results in `docs/tech/nvme-benchmark-post-gxa7802q.md` |