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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
155 lines
4.0 KiB
Markdown
155 lines
4.0 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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## Firmware Update Applied
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> **Date**: 2026-04-02 10:51 CET
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### Key Discovery: Firmware Naming Convention
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| Suffix | Type | Model Suffix |
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|--------|------|-------------|
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| `GXA***1Q` | Non-SED | `00B00` (our drive) |
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| `GXA***2Q` | SED | `00B07` |
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Our drive (MZVL2512HCJQ-**00B00**) requires `GXA7801Q`, NOT `GXA7802Q`.
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The OVH mirror only hosts `GXA7802Q` (SED variant) which was rejected as "Invalid Firmware Image".
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### Correct Firmware Source
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- **Repository**: `lolyinseo/samsung-nvme-firmware` (GitHub, 199 stars)
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- **File**: `PM9A1/ASUS/GXA7801Q/GXA7801Q_20221102.bin`
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- **Size**: 2,097,152 bytes (2.0 MiB)
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- **SHA256**: `76ad2b0c35581cb71bd4c5a5fd358a15c4432aa38e9e983acc2349d2b24b5a11`
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### Update Process (all succeeded)
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```bash
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# Step 1: Download to controller SRAM
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sudo nvme fw-download --fw=/tmp/GXA7801Q.bin /dev/nvme0n1
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# → Firmware download success
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# Step 2: Install to slot 2 (preserve original in slot 1)
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sudo nvme fw-commit -s 2 -a 0 /dev/nvme0
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# → Success committing firmware action:0 slot:2
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# Step 3: Activate slot 2
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sudo nvme fw-commit -s 2 -a 2 /dev/nvme0
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# → Success committing firmware action:2 slot:2
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# Step 4: Reboot to apply
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sudo reboot
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```
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## Next Steps
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- [x] Reboot system to activate GXA7801Q firmware
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- [x] Verify firmware version with `nvme list` -> GXA7801Q confirmed
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- [x] Re-run identical benchmarks post-update
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- [x] Compare results in `docs/tech/nvme-benchmark-post-gxa7801q.md`
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