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Oracle DR: Complete Phase 5 - NFS mount point configuration

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Phase 5 implementation completed:
- NFS server installed on Proxmox (nfs-kernel-server)
- NFS export configured: /mnt/pve/oracle-backups → VM 109
- Windows NFS Client enabled in VM 109
- F:\ drive auto-mount at startup via scheduled task
- PowerShell script: D:\Oracle\Scripts\mount-nfs.bat
- Directory permissions set to 777 for Windows compatibility
- Mount persists across VM reboots

Files updated:
- DR_UPGRADE_TO_CUMULATIVE_PLAN.md: Status → Phases 1-3-5 COMPLETED
- Added detailed Phase 5 documentation with step-by-step setup
- Updated validation checklist (8 items completed)

Next: Phases 4, 6, 7 (scheduled tasks, restore script, testing)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
Marius
2025-10-10 01:21:47 +03:00
parent ec77bb3ddf
commit 8682e0ee04
2 changed files with 194 additions and 50 deletions
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42
input/copy_existing_key_to_proxmox.ps1
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@@ -1,7 +1,7 @@
# Copy Existing SSH Key to Proxmox # Copy Existing SSH Key to Proxmox
# Rulează acest script pe PRIMARY ca Administrator # Ruleaza acest script pe PRIMARY ca Administrator
# #
# Acest script copiază cheia publică SSH existentă din profilul SYSTEM pe Proxmox # Acest script copiaza cheia publica SSH existenta din profilul SYSTEM pe Proxmox
param( param(
[string]$ProxmoxHost = "10.0.20.202", [string]$ProxmoxHost = "10.0.20.202",
@@ -9,7 +9,7 @@ param(
) )
Write-Host "=========================================" -ForegroundColor Cyan Write-Host "=========================================" -ForegroundColor Cyan
Write-Host "Copiere Cheie SSH Existentă → Proxmox DR" -ForegroundColor Cyan Write-Host "Copiere Cheie SSH Existenta -> Proxmox DR" -ForegroundColor Cyan
Write-Host "=========================================" -ForegroundColor Cyan Write-Host "=========================================" -ForegroundColor Cyan
Write-Host "" Write-Host ""
@@ -17,62 +17,62 @@ $SystemSSHDir = "C:\Windows\System32\config\systemprofile\.ssh"
$PublicKeyPath = "$SystemSSHDir\id_rsa.pub" $PublicKeyPath = "$SystemSSHDir\id_rsa.pub"
$PrivateKeyPath = "$SystemSSHDir\id_rsa" $PrivateKeyPath = "$SystemSSHDir\id_rsa"
# Verifică dacă cheia există # Verifica daca cheia exista
if (-not (Test-Path $PublicKeyPath)) { if (-not (Test-Path $PublicKeyPath)) {
Write-Host "✗ Cheia publică nu există: $PublicKeyPath" -ForegroundColor Red Write-Host "X Cheia publica nu exista: $PublicKeyPath" -ForegroundColor Red
Write-Host " Scriptul trebuie rulat ca Administrator!" -ForegroundColor Yellow Write-Host " Scriptul trebuie rulat ca Administrator!" -ForegroundColor Yellow
exit 1 exit 1
} }
Write-Host "✓ Cheie publică găsită: $PublicKeyPath" -ForegroundColor Green Write-Host "OK Cheie publica gasita: $PublicKeyPath" -ForegroundColor Green
Write-Host "" Write-Host ""
Write-Host "→ Copiez cheia publică pe Proxmox ($ProxmoxHost)..." -ForegroundColor Yellow Write-Host "-> Copiez cheia publica pe Proxmox ($ProxmoxHost)..." -ForegroundColor Yellow
Write-Host " IMPORTANT: Vei fi întrebat de parola root pentru Proxmox!" -ForegroundColor Cyan Write-Host " IMPORTANT: Vei fi intrebat de parola root pentru Proxmox!" -ForegroundColor Cyan
Write-Host "" Write-Host ""
# Metodă simplă: folosim SCP pentru a copia fișierul temporar, apoi cat # Metoda simpla: folosim SCP pentru a copia fisierul temporar, apoi cat
$tempFile = "C:\Windows\Temp\temp_pubkey.pub" $tempFile = "C:\Windows\Temp\temp_pubkey.pub"
Copy-Item $PublicKeyPath $tempFile -Force Copy-Item $PublicKeyPath $tempFile -Force
# Copiază fișierul pe Proxmox # Copiaza fisierul pe Proxmox
& scp $tempFile "${ProxmoxUser}@${ProxmoxHost}:/tmp/temp_pubkey.pub" & scp $tempFile "${ProxmoxUser}@${ProxmoxHost}:/tmp/temp_pubkey.pub"
if ($LASTEXITCODE -ne 0) { if ($LASTEXITCODE -ne 0) {
Write-Host "✗ Eroare la copierea fișierului cu SCP" -ForegroundColor Red Write-Host "X Eroare la copierea fisierului cu SCP" -ForegroundColor Red
Remove-Item $tempFile -Force -ErrorAction SilentlyContinue Remove-Item $tempFile -Force -ErrorAction SilentlyContinue
exit 1 exit 1
} }
# Adaugă cheia în authorized_keys # Adauga cheia in authorized_keys
& ssh "${ProxmoxUser}@${ProxmoxHost}" "mkdir -p /root/.ssh; chmod 700 /root/.ssh; cat /tmp/temp_pubkey.pub >> /root/.ssh/authorized_keys; chmod 600 /root/.ssh/authorized_keys; rm /tmp/temp_pubkey.pub; echo 'SSH key added'" & ssh "${ProxmoxUser}@${ProxmoxHost}" "mkdir -p /root/.ssh; chmod 700 /root/.ssh; cat /tmp/temp_pubkey.pub >> /root/.ssh/authorized_keys; chmod 600 /root/.ssh/authorized_keys; rm /tmp/temp_pubkey.pub; echo 'SSH key added'"
Remove-Item $tempFile -Force -ErrorAction SilentlyContinue Remove-Item $tempFile -Force -ErrorAction SilentlyContinue
if ($LASTEXITCODE -eq 0) { if ($LASTEXITCODE -eq 0) {
Write-Host "✓ Cheie publică copiată pe Proxmox!" -ForegroundColor Green Write-Host "OK Cheie publica copiata pe Proxmox!" -ForegroundColor Green
} else { } else {
Write-Host "✗ Eroare la adăugarea cheii în authorized_keys" -ForegroundColor Red Write-Host "X Eroare la adaugarea cheii in authorized_keys" -ForegroundColor Red
exit 1 exit 1
} }
Write-Host "" Write-Host ""
Write-Host "→ Testez conexiunea SSH fără parolă..." -ForegroundColor Yellow Write-Host "-> Testez conexiunea SSH fara parola..." -ForegroundColor Yellow
# Testează conexiunea (cu cheia din profilul SYSTEM) # Testeaza conexiunea (cu cheia din profilul SYSTEM)
$testResult = & ssh -o StrictHostKeyChecking=no -i $PrivateKeyPath "${ProxmoxUser}@${ProxmoxHost}" "echo 'SSH connection OK'" 2>&1 $testResult = & ssh -o StrictHostKeyChecking=no -i $PrivateKeyPath "${ProxmoxUser}@${ProxmoxHost}" "echo 'SSH connection OK'" 2>&1
if ($LASTEXITCODE -eq 0) { if ($LASTEXITCODE -eq 0) {
Write-Host "✓ Conexiune SSH funcționează fără parolă!" -ForegroundColor Green Write-Host "OK Conexiune SSH functioneaza fara parola!" -ForegroundColor Green
} else { } else {
Write-Host "✗ Conexiunea SSH nu funcționează direct din acest cont" -ForegroundColor Yellow Write-Host "X Conexiunea SSH nu functioneaza direct din acest cont" -ForegroundColor Yellow
Write-Host " Dar cheia a fost adăugată - scheduled tasks (SYSTEM) ar trebui să funcționeze" -ForegroundColor Yellow Write-Host " Dar cheia a fost adaugata - scheduled tasks (SYSTEM) ar trebui sa functioneze" -ForegroundColor Yellow
} }
Write-Host "" Write-Host ""
Write-Host "=========================================" -ForegroundColor Green Write-Host "=========================================" -ForegroundColor Green
Write-Host "✓ Setup complet!" -ForegroundColor Green Write-Host "OK Setup complet!" -ForegroundColor Green
Write-Host "=========================================" -ForegroundColor Green Write-Host "=========================================" -ForegroundColor Green
Write-Host "" Write-Host ""
Write-Host "Cheia din profilul SYSTEM: $PrivateKeyPath" -ForegroundColor Cyan Write-Host "Cheia din profilul SYSTEM: $PrivateKeyPath" -ForegroundColor Cyan
Write-Host "Scheduled tasks vor folosi această cheie automat." -ForegroundColor Yellow Write-Host "Scheduled tasks vor folosi aceasta cheie automat." -ForegroundColor Yellow
Write-Host "" Write-Host ""

202
oracle/standby-server-scripts/DR_UPGRADE_TO_CUMULATIVE_PLAN.md
View File

@@ -1,8 +1,8 @@
# Oracle DR - Upgrade to Cumulative Incremental Backup Strategy # Oracle DR - Upgrade to Cumulative Incremental Backup Strategy
**Generated:** 2025-10-09 **Generated:** 2025-10-09
**Last Updated:** 2025-10-09 19:00 **Last Updated:** 2025-10-10 00:45
**Status:** 🟡 IN PROGRESS - Phases 1-3 COMPLETED **Status:** 🟡 IN PROGRESS - Phases 1-3-5 COMPLETED
**Objective:** Implement cumulative incremental backups with Proxmox host storage for optimal RPO/RTO **Objective:** Implement cumulative incremental backups with Proxmox host storage for optimal RPO/RTO
**Target RPO:** 3-4 hours (vs current 24 hours) **Target RPO:** 3-4 hours (vs current 24 hours)
**Target RTO:** 12-15 minutes (unchanged) **Target RTO:** 12-15 minutes (unchanged)
@@ -11,7 +11,7 @@
## ✅ IMPLEMENTATION STATUS ## ✅ IMPLEMENTATION STATUS
### Completed (2025-10-09) ### Completed (2025-10-09 + 2025-10-10)
- ✅ **Phase 1:** Proxmox host storage configured (`/mnt/pve/oracle-backups/ROA/autobackup`) - ✅ **Phase 1:** Proxmox host storage configured (`/mnt/pve/oracle-backups/ROA/autobackup`)
- ✅ **Phase 2:** RMAN script already has `CUMULATIVE` keyword - ✅ **Phase 2:** RMAN script already has `CUMULATIVE` keyword
- ✅ **Phase 3:** Transfer scripts updated to send to Proxmox (10.0.20.202:22, root) - ✅ **Phase 3:** Transfer scripts updated to send to Proxmox (10.0.20.202:22, root)
@@ -19,13 +19,20 @@
- Changed from VM 109 (10.0.20.37:22122) to Proxmox host - Changed from VM 109 (10.0.20.37:22122) to Proxmox host
- Converted Windows PowerShell commands to Linux bash - Converted Windows PowerShell commands to Linux bash
- ✅ **VM 109 cleanup:** Deleted temporary files, old backups (~6.4 GB freed) - ✅ **VM 109 cleanup:** Deleted temporary files, old backups (~6.4 GB freed)
- ✅ **Phase 5:** NFS mount point configured on VM 109 → **F:\ drive**
- NFS server installed on Proxmox: `nfs-kernel-server`
- NFS export configured: `/mnt/pve/oracle-backups → 10.0.20.37 (rw,no_root_squash)`
- NFS Client enabled in Windows VM 109
- Mount command: `mount -o rw,nolock,mtype=hard,timeout=60 10.0.20.202:/mnt/pve/oracle-backups F:`
- PowerShell scheduled task created for auto-mount at startup (`D:\Oracle\Scripts\mount-nfs.bat`)
- Permissions set to 777 on Proxmox directory
- **Status:** F:\ mounts automatically at Windows startup ✅
### Pending (Next Session) ### Pending (Next Session)
- ⏳ **SSH Key Setup:** Run `copy_existing_key_to_proxmox.ps1` on PRIMARY as Administrator - ⏳ **SSH Key Setup:** Run `copy_existing_key_to_proxmox.ps1` on PRIMARY as Administrator
- Existing key: `C:\Windows\System32\config\systemprofile\.ssh\id_rsa` - Existing key: `C:\Windows\System32\config\systemprofile\.ssh\id_rsa`
- Copy to: Proxmox `/root/.ssh/authorized_keys` - Copy to: Proxmox `/root/.ssh/authorized_keys`
- ⏳ **Phase 4:** Modify scheduled tasks (13:00 + 18:00) - ⏳ **Phase 4:** Modify scheduled tasks on PRIMARY (13:00 + 18:00)
- ⏳ **Phase 5:** Configure mount point on VM 109 (will appear as F:\)
- ⏳ **Phase 6:** Update restore script to use F:\ mount - ⏳ **Phase 6:** Update restore script to use F:\ mount
- ⏳ **Phase 7:** Test FULL + CUMULATIVE backup and restore - ⏳ **Phase 7:** Test FULL + CUMULATIVE backup and restore
@@ -36,6 +43,14 @@ oracle/standby-server-scripts/
├── transfer_to_dr.ps1 [MODIFIED] → Proxmox host ├── transfer_to_dr.ps1 [MODIFIED] → Proxmox host
├── rman_backup_incremental.txt [ALREADY OK] → Has CUMULATIVE ├── rman_backup_incremental.txt [ALREADY OK] → Has CUMULATIVE
└── copy_existing_key_to_proxmox.ps1 [NEW] → Setup script for SSH key └── copy_existing_key_to_proxmox.ps1 [NEW] → Setup script for SSH key
VM 109 (Windows):
├── C:\Scripts\mount-nfs.ps1 [NEW] → PowerShell script for NFS mount
└── Scheduled Task: "Mount NFS F" [NEW] → Auto-mount at startup
Proxmox (pveelite):
├── /etc/exports [MODIFIED] → NFS export configuration
└── /mnt/pve/oracle-backups/ [PERMISSIONS] → chmod 777
``` ```
--- ---
@@ -340,11 +355,120 @@ Get-ScheduledTask | Where-Object {$_.TaskName -like "*Oracle*"} |
--- ---
### PHASE 5: Update DR Restore Script (30 minutes) ### PHASE 5: Configure NFS Mount Point on VM 109 (30 minutes) ✅ COMPLETED
**Objective:** Update restore script to read backups from mount point (E:\) and handle cumulative backups **Objective:** Mount Proxmox backup storage as F:\ drive in Windows VM using NFS
#### 5.1 Modifică scriptul de restore existent pentru cumulative backups **Status:** ✅ COMPLETED on 2025-10-10
#### 5.1 Install and configure NFS server on Proxmox
```bash
# SSH to Proxmox host
ssh root@10.0.20.202
# Install NFS server
apt install -y nfs-kernel-server
# Configure NFS export
echo '/mnt/pve/oracle-backups 10.0.20.37(rw,sync,no_subtree_check,no_root_squash)' >> /etc/exports
# Apply export configuration
exportfs -ra
# Set permissions for Windows compatibility
chmod -R 777 /mnt/pve/oracle-backups
# Verify export
showmount -e localhost
# Expected output: /mnt/pve/oracle-backups 10.0.20.37
```
#### 5.2 Enable NFS Client in Windows VM 109
```powershell
# SSH to VM 109
ssh -p 22122 romfast@10.0.20.37
# Enable NFS Client feature
Enable-WindowsOptionalFeature -Online -FeatureName ServicesForNFS-ClientOnly -All -NoRestart
Enable-WindowsOptionalFeature -Online -FeatureName ClientForNFS-Infrastructure -All -NoRestart
Enable-WindowsOptionalFeature -Online -FeatureName NFS-Administration -All -NoRestart
# Verify installation
Get-WindowsOptionalFeature -Online | Where-Object {$_.FeatureName -like "*NFS*"}
```
#### 5.3 Create PowerShell mount script with auto-retry
```powershell
# Create Scripts directory
mkdir C:\Scripts
# Create mount script
notepad C:\Scripts\mount-nfs.ps1
```
**Content of `C:\Scripts\mount-nfs.ps1`:**
```powershell
Start-Sleep -Seconds 10
# Wait for NFS Client service
$timeout = 60
$elapsed = 0
while ($elapsed -lt $timeout) {
$nfsService = Get-Service | Where-Object {$_.Name -like "*NFS*" -and $_.Status -eq "Running"}
if ($nfsService) { break }
Start-Sleep -Seconds 5
$elapsed += 5
}
# Unmount F: if exists
try { & umount F: 2>$null } catch {}
# Mount NFS share
Start-Sleep -Seconds 5
& mount -o rw,nolock,mtype=hard,timeout=60 10.0.20.202:/mnt/pve/oracle-backups F:
# Log result
"$(Get-Date) - Mount completed" | Out-File C:\Scripts\mount-nfs.log -Append
```
#### 5.4 Create scheduled task for auto-mount at startup
```cmd
# Create scheduled task (run in CMD as Administrator)
schtasks /create /tn "Mount NFS F" /tr "powershell.exe -ExecutionPolicy Bypass -File C:\Scripts\mount-nfs.ps1" /sc onstart /ru SYSTEM /rl HIGHEST /delay 0000:30 /f
# Verify task creation
schtasks /query /tn "Mount NFS F"
# Test manual mount
mount -o rw,nolock,mtype=hard,timeout=60 10.0.20.202:/mnt/pve/oracle-backups F:
# Verify mount
dir F:\ROA\autobackup
```
#### 5.5 Verification checklist
- [x] NFS server running on Proxmox (port 2049)
- [x] Export visible: `showmount -e 10.0.20.202`
- [x] Windows NFS Client services enabled
- [x] F:\ drive mounts successfully with manual command
- [x] Scheduled task runs at startup
- [x] F:\ persists after VM reboot
- [x] Can create/read/write files on F:\ROA\autobackup
**⚠️ IMPORTANT NOTES:**
- NFS uses IP-based authentication (no username/password)
- Only VM 109 (10.0.20.37) can access the share
- `no_root_squash` allows Windows to write as root
- Permissions 777 on Proxmox ensure Windows compatibility
- Mount point is **F:\** (not E:\, which is already in use)
---
### PHASE 6: Update DR Restore Script (30 minutes)
**Objective:** Update restore script to read backups from F:\ mount point and handle cumulative backups
#### 6.1 Modifică scriptul de restore existent pentru cumulative backups
**Fișier:** `D:\oracle\scripts\rman_restore_final.cmd` (scriptul tău existent) **Fișier:** `D:\oracle\scripts\rman_restore_final.cmd` (scriptul tău existent)
**Modificări necesare:** **Modificări necesare:**
@@ -493,11 +617,11 @@ exit /b 0
--- ---
### PHASE 6: Weekly Test Procedure (1 hour first time, 30 min ongoing) ### PHASE 7: Weekly Test Procedure (1 hour first time, 30 min ongoing)
**Objective:** Document weekly test procedure using new cumulative backup strategy **Objective:** Document weekly test procedure using new cumulative backup strategy
#### 6.1 Test procedure (run on Saturday morning) #### 7.1 Test procedure (run on Saturday morning)
```bash ```bash
# On Linux workstation or any machine with SSH to Proxmox # On Linux workstation or any machine with SSH to Proxmox
@@ -543,7 +667,7 @@ ssh root@10.0.20.202 "qm shutdown 109"
ssh root@10.0.20.202 "qm status 109" ssh root@10.0.20.202 "qm status 109"
``` ```
#### 6.2 Create automated test script #### 7.2 Create automated test script
```bash ```bash
#!/bin/bash #!/bin/bash
# File: /root/scripts/test_oracle_dr.sh # File: /root/scripts/test_oracle_dr.sh
@@ -669,17 +793,23 @@ Register-ScheduledTask -Xml (Get-Content "D:\rman_backup\backup_tasks\Oracle RMA
After completing implementation: After completing implementation:
- [ ] Proxmox host directory created: `/mnt/pve/oracle-backups/ROA/autobackup` - [x] Proxmox host directory created: `/mnt/pve/oracle-backups/ROA/autobackup`
- [ ] VM 109 mount point configured and tested (E:\ visible in Windows) - [x] NFS server installed and configured on Proxmox
- [ ] RMAN script modified to CUMULATIVE (keyword added) - [x] NFS export configured for VM 109 (10.0.20.37)
- [ ] New transfer script created (`02_transfer_to_pveelite_host.ps1`) - [x] NFS Client enabled in Windows VM 109
- [x] F:\ mount point configured and tested (NFS mount working)
- [x] PowerShell mount script created (`C:\Scripts\mount-nfs.ps1`)
- [x] Scheduled task "Mount NFS F" created for auto-mount at startup
- [x] F:\ drive persists after VM reboot
- [ ] RMAN script modified to CUMULATIVE (keyword added) - **Already has CUMULATIVE**
- [ ] Transfer scripts updated to send to Proxmox host
- [ ] SSH key for Proxmox host created and tested - [ ] SSH key for Proxmox host created and tested
- [ ] Scheduled task created for 13:00 CUMULATIVE backup - [ ] Scheduled task created for 13:00 CUMULATIVE backup on PRIMARY
- [ ] Scheduled task created for 18:00 CUMULATIVE backup - [ ] Scheduled task created for 18:00 CUMULATIVE backup on PRIMARY
- [ ] Existing 02:30 FULL task updated to use new transfer script - [ ] Existing 02:30 FULL task updated to use new transfer script
- [ ] Manual test of CUMULATIVE backup successful - [ ] Manual test of CUMULATIVE backup successful
- [ ] Manual test of backup transfer to host successful - [ ] Manual test of backup transfer to host successful
- [ ] DR restore script updated (`rman_restore_cumulative.cmd`) - [ ] DR restore script updated to use F:\ mount
- [ ] Full end-to-end restore test successful - [ ] Full end-to-end restore test successful
- [ ] Weekly test script created and tested - [ ] Weekly test script created and tested
- [ ] Documentation updated (STATUS and IMPLEMENTATION_PLAN docs) - [ ] Documentation updated (STATUS and IMPLEMENTATION_PLAN docs)
@@ -688,23 +818,37 @@ After completing implementation:
## 📞 NEXT SESSION HANDOFF ## 📞 NEXT SESSION HANDOFF
**Status:** PLAN COMPLETE - Ready for implementation **Status:** 🟡 PHASES 1-3-5 COMPLETED - Continue with Phases 4, 6, 7
**Estimated Implementation Time:** 2-3 hours **Estimated Remaining Time:** 1.5-2 hours
**Recommended Schedule:** Saturday morning (low activity time) **Recommended Schedule:** Saturday morning (low activity time)
**Context for next session:** **Context for next session:**
1. Primary server: 10.0.20.36 (Windows, Oracle 19c, database ROA) 1. Primary server: 10.0.20.36 (Windows, Oracle 19c, database ROA)
2. DR VM: 109 on pveelite (10.0.20.37, currently working with FULL-only restore) 2. DR VM: 109 on pveelite (10.0.20.37, **F:\ NFS mount configured and working** ✅)
3. Proxmox host: pveelite (10.0.20.202) 3. Proxmox host: pveelite (10.0.20.202, **NFS server running** ✅)
4. Goal: Implement CUMULATIVE incremental backups (13:00 + 18:00) for better RPO (4-5 hours vs 24 hours) 4. Goal: Complete scheduled tasks on PRIMARY + update restore script + test end-to-end
5. Key change: Backups stored on Proxmox host, mounted in VM 109 when needed 5. **Completed:** Storage setup, NFS mount, transfer scripts to Proxmox
**Start implementation with:** **What's DONE:**
- ✅ Proxmox host storage (`/mnt/pve/oracle-backups/ROA/autobackup`)
- ✅ NFS server on Proxmox with export for VM 109
- ✅ NFS Client in Windows VM 109
- ✅ F:\ drive auto-mounts at startup via scheduled task
- ✅ Transfer scripts modified to send to Proxmox host
- ✅ RMAN script already has CUMULATIVE keyword
**Next steps to complete:**
```bash ```bash
# Phase 1 - Proxmox host storage setup (15 min) # Phase 4 - Update scheduled tasks on PRIMARY (45 min)
ssh root@10.0.20.202 # 1. Setup SSH key from PRIMARY to Proxmox
mkdir -p /mnt/pve/oracle-backups/ROA/autobackup # 2. Test transfer scripts
# ... follow Phase 1 steps # 3. Create/modify scheduled tasks for 13:00 and 18:00
# Phase 6 - Update DR restore script (30 min)
# Modify restore script to use F:\ instead of local path
# Phase 7 - End-to-end test (30 min)
# Full test: backup → transfer → mount → restore
``` ```
**IMPORTANT - Backup manual înainte de modificări:** **IMPORTANT - Backup manual înainte de modificări:**