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bbdcd43e01
- Post-update fio benchmark: random read +12.4%, write +15.9% IOPS - Latency reduced 10-14% for random workloads - SMART health unchanged: 0 media errors, 0 error log entries - Firmware research status updated to complete - Pre-benchmark checklist marked done
117 lines
2.9 KiB
Markdown
117 lines
2.9 KiB
Markdown
# NVMe Benchmark: Post-Firmware Update (GXA7801Q)
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> **Date**: 2026-04-02 14:57 CET
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> **Device**: Samsung PM9A1 (MZVL2512HCJQ-00B00), 512GB
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> **Serial**: S675NF0R703667
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> **Firmware**: GXA7801Q (post-update, was GXA7401Q)
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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 (Post-Update)
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| Metric | Value |
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|--------|-------|
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| Critical Warning | 0 (healthy) |
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| Temperature | 45°C (Sensor 2: 49°C) |
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| Available Spare | 100% |
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| Percentage Used | 19% |
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| Data Units Read | 17.98 TB |
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| Data Units Written | 94.22 TB |
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| Power Cycles | 884 |
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| Power On Hours | 4,930 h |
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| Media Errors | 0 |
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| Error Log Entries | 0 |
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## fio Benchmark Results
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### Sequential Read (128K block, QD32)
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| Metric | Value |
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|--------|-------|
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| Bandwidth | 8,214 MB/s |
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| IOPS | 65,716 |
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| Avg Latency | 487 µs |
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### Sequential Write (128K block, QD32)
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| Metric | Value |
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|--------|-------|
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| Bandwidth | 4,093 MB/s |
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| IOPS | 32,747 |
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| Avg Latency | 977 µs |
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### Random Read (4K block, QD32)
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| Metric | Value |
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|--------|-------|
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| IOPS | 405,924 |
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| Avg Latency | 79 µs |
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### Random Write (4K block, QD32)
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| Metric | Value |
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|--------|-------|
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| IOPS | 337,313 |
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| Avg Latency | 95 µs |
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### Random Read (4K block, QD1)
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| Metric | Value |
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|--------|-------|
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| IOPS | 424,803 |
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| Avg Latency | 2 µs |
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### Random Write (4K block, QD1)
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| Metric | Value |
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|--------|-------|
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| IOPS | 355,268 |
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| Avg Latency | 3 µs |
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## Comparison: GXA7401Q vs GXA7801Q
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> **Note**: Sequential tests used different block sizes (pre: 4K, post: 128K).
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> Random 4K QD32 tests are directly comparable.
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### Random 4K QD32 (Comparable)
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| Metric | GXA7401Q | GXA7801Q | Delta |
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|--------|----------|----------|-------|
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| Read IOPS | 361,000 | 405,924 | +12.4% |
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| Write IOPS | 291,000 | 337,313 | +15.9% |
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| Read Latency | 88 µs | 79 µs | -10.2% |
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| Write Latency | 110 µs | 95 µs | -13.6% |
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### SMART Comparison
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| Metric | Before | After |
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|--------|--------|-------|
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| Media Errors | 0 | 0 |
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| Error Log Entries | 0 | 0 |
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| Temperature (load) | 51-64°C | 45-49°C |
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## Test Configuration
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```text
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fio-3.41
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IO Engine: libaio, Direct IO
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IO Depth: 32 (seq + rand main), 1 (QD1 tests)
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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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- Firmware update successful: GXA7401Q -> GXA7801Q confirmed
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- Random IOPS improved +12-16% at same queue depth
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- Latency reduced 10-14% for random workloads
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- SMART health unchanged: 0 media errors, 0 error log entries
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- Temperature lower post-update (likely due to fresh boot vs loaded state)
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- TRIM/unmap handling fix from GXA7801Q changelog should improve long-term write stability
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## Conclusion
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The GXA7801Q firmware update delivers measurable improvements in random I/O
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performance and latency. Combined with the TRIM handling fixes, this update
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is recommended for all Samsung PM9A1 non-SED drives running older firmware. |