vault backup: 2026-03-28 21:26:17

notes/Unraid Drive Replacement Plan.md

@@ -0,0 +1,119 @@
+# Unraid Drive Replacement Plan
+
+## Risk Tolerance: 20% cumulative failure probability
+
+## Current Array (as of 2026-03-28)
+
+| Slot | Model | Serial | Age | Est. AFR | Notes |
+|------|-------|--------|-----|----------|-------|
+| Parity 1 | ST8000DM004 8TB SMR | ZCT2K65B | 5.3 yr | ~4.5% | Had 180 GP errors (cleared) |
+| Parity 2 | ST8000DM004 8TB SMR | ZCT2K5PQ | 5.3 yr | ~3.5% | Had 19 GP errors (cleared) |
+| Disk 1 | ST8000DM004 8TB SMR | ZCT2K3FF | 5.3 yr | ~2.75% | Same batch as parity drives |
+| Disk 2 | ST8000DM004 8TB SMR | ZCT2K51K | 5.3 yr | ~2.75% | 1 CRC error |
+| Disk 3 | ST8000DM004 8TB SMR | ZCT3XAEJ | 4.8 yr | ~3.5% | Had 10 GP errors, 2 CRC, 72K load cycles |
+| Disk 4 | WD40EFRX 4TB CMR | WD-WCC7K2YF4TDJ | 6.6 yr | ~2.5% | Pristine SMART, lowest priority |
+| Disk 5 | ST8000DM004 8TB SMR | ZR14W632 | 2.5 yr | ~1.75% | 56C lifetime max |
+| Disk 6 | ST8000DM004 8TB SMR | ZR150CVS | 2.5 yr | ~1.75% | Clean |
+| Cache | Samsung 970 EVO 1TB | — | — | — | 1% wear, excellent |
+
+All 7 Seagate drives are consumer desktop SMR (not NAS-grade). Dual parity protects against up to 2 simultaneous failures.
+
+## Timeline
+
+### March 2027 — Parity 1
+
+| | Details |
+|--|---------|
+| Remove | ST8000DM004 8TB (ZCT2K65B) |
+| Install | **Seagate Exos X24 24TB** (ST24000NM002H) |
+| Cost | ~$380 |
+| Time | Parity sync ~18 hrs |
+| Risk at swap | ~20% |
+
+**Steps:** Stop array > power down > swap drive > power up > assign to Parity 1 slot > start array > parity sync
+
+Keep old drive labeled as cold spare.
+
+---
+
+### May 2028 — Parity 2 + Disk 3
+
+Do these a week apart. Parity first, then data drive.
+
+**Parity 2:**
+
+| | Details |
+|--|---------|
+| Remove | ST8000DM004 8TB (ZCT2K5PQ) |
+| Install | **Seagate Exos X24 24TB** (ST24000NM002H) |
+| Cost | ~$380 |
+| Time | Parity sync ~18 hrs |
+
+**Disk 3 (one week later):**
+
+| | Details |
+|--|---------|
+| Remove | ST8000DM004 8TB (ZCT3XAEJ) |
+| Install | **Toshiba MG10 20TB** (MG10ACA20TE) |
+| Cost | ~$300 |
+| Time | Rebuild ~18-20 hrs |
+
+Combined cost: ~$700. Risk at swap: ~20%. After this, monthly failure rate drops to ~0.9%.
+
+---
+
+### Mid 2030 — Disks 1 & 2
+
+| Slot | Install | Cost |
+|------|---------|------|
+| Disk 1 | **Toshiba MG10 20TB** | ~$300 |
+| Disk 2 | **WD Ultrastar HC560 20TB** | ~$300 |
+
+Same batch as old parity drives, will be ~9 years old. Combined: ~$600.
+
+---
+
+### Whenever — Disks 4, 5, 6
+
+Low risk, replace opportunistically on sales. ~$300 each, ~$900 total.
+
+## Total Cost
+
+| Phase | When | Cost | Running Total |
+|-------|------|------|--------------|
+| Parity 1 | Mar 2027 | $380 | $380 |
+| Parity 2 + Disk 3 | May 2028 | $700 | $1,080 |
+| Disks 1 & 2 | Mid 2030 | $600 | $1,680 |
+| Disks 4, 5, 6 | Whenever | $900 | $2,580 |
+
+## If a Drive Fails Before Its Scheduled Replacement
+
+- **Parity drive fails:** Buy 1x Exos X24 24TB, swap, parity sync
+- **Data drive fails:** Need 2 drives — 1x Exos X24 24TB (new parity, since 20TB data > 8TB parity) + 1x 20TB data drive. Upgrade parity first, then replace data drive.
+
+Array stays online with a failed drive (dual parity). No data loss. Performance reduced until rebuild.
+
+## Final Array
+
+| Slot | Drive | Brand | Size |
+|------|-------|-------|------|
+| Parity 1 | Exos X24 | Seagate | 24TB |
+| Parity 2 | Exos X24 | Seagate | 24TB |
+| Disk 1 | MG10 | Toshiba | 20TB |
+| Disk 2 | HC560 | WD | 20TB |
+| Disk 3 | MG10 | Toshiba | 20TB |
+| Disk 4 | TBD | TBD | 20TB+ |
+| Disk 5 | HC560 | WD | 20TB |
+| Disk 6 | MG10 | Toshiba | 20TB |
+
+Usable capacity: ~120TB (up from ~48TB). All CMR, all enterprise/NAS-grade, 3 brands, 5-year warranties.
+
+## Pending Config Fixes
+
+- [ ] Remove compose.manager plugin (deprecated, still installed)
+- [ ] Set share security to Private (disk shares still "public")
+- [ ] Move domains share to cache (useCache should be "prefer")
+- [ ] Set up email/push notifications for drive alerts
+- [ ] Configure UPS auto-shutdown (CyberPower CP1500, nut-dw plugin installed)
+- [ ] Enable XMP in BIOS (RAM running 1333 MT/s, rated for 1600 MT/s)
+- [ ] Verify appdata backups — test a restore

notes/martial_arts/八极拳/陈氏太极拳/CTJ-lesson066.md

@@ -0,0 +1,14 @@
+---
+类型: 笔记
+tags:
+  - 笔记
+  - 武术
+日期: 2026-03-18
+老师: Vincent
+武术: 陈氏太极拳
+---
+
+# 发劲六式
+1. 撑掌 - 别忘了探掌，然后最后几寸的时候发力
+
+# 意念不要只到掌根，要到指尖，注意掌形

notes/martial_arts/八极拳/陈氏太极拳/CTJ-lesson067.md

@@ -0,0 +1,21 @@
+---
+类型: 笔记
+tags:
+  - 笔记
+  - 武术
+日期: 2026-03-25
+老师: Vincent
+武术: 陈氏太极拳
+---
+# 懒扎衣
+- 刚开始两手分开时，右手掌心朝自己
+- 向上穿，然后向下，穿的时候前手臂要转，配合后脚碾步
+
+# 抱虎归山
+- 太硬了
+- 两掌相对，靠近，差不多一起去捋，不要一前一后
+- 探，撑
+
+# 白鹤亮翅
+1. 两只手要在身体前面，左手在膝盖左上方一点
+    1. 大概在自己身前一两掌的距离