Sankofa/docs/infrastructure/r630-01-disk-layout.md

# R630-01 Disk Layout Reference

## Overview
This document describes the disk layout for the R630-01 Proxmox VE host based on `lsblk` output.

## Disk Inventory

### System Disk: `/dev/sda` (279.4G)
- **Type**: System/OS disk with LVM
- **Partitions**:
  - `sda1`: 1007K (BIOS boot partition)
  - `sda2`: 1G (EFI boot partition, mounted at `/boot/efi`)
  - `sda3`: 278G (LVM physical volume)
- **LVM Volumes**:
  - `pve-swap`: 8G (swap)
  - `pve-root`: 79.5G (root filesystem, mounted at `/`)
  - `pve-data`: 171G (Proxmox data storage)
- **Status**: ✅ Active system disk
- **Usage**: Proxmox VE host OS and base storage

### Secondary Disk: `/dev/sdb` (279.4G)
- **Type**: Standalone LVM physical volume (not in volume group)
- **Partitions**: None (has LVM2_member signature)
- **Status**: ✅ Available for use (needs LVM signature removal for Ceph)
- **Model**: HUC106030CSS600
- **Recommendations**:
  - Ceph OSD (wipe LVM signature first)
  - Proxmox storage pool
  - Backup storage

### Ceph Candidate Disks: `/dev/sdc` through `/dev/sdh` (6x 232.9G)
- **Type**: SSDs - Ready for Ceph OSDs
- **Model**: CT250MX500SSD1 (Crucial MX500)
- **Size**: ~232.9G each
- **Total Capacity**: ~1.4TB
- **Status**: ✅ All 6 disks available (no partitions, unmounted)
- **Typical Usage**: Ceph OSD nodes for distributed storage

## Disk Layout Summary

```
sda (279.4G) - System Disk
├─ sda1 (1007K) - BIOS boot
├─ sda2 (1G) - EFI boot [/boot/efi]
└─ sda3 (278G) - LVM PV
   ├─ pve-swap (8G)
   ├─ pve-root (79.5G) [/]
   └─ pve-data (171G)

sdb (279.4G) - Available

sdc-sdh (6x 232.9G) - Storage/Ceph candidates
```

## Storage Recommendations

### For Ceph OSD Setup (Recommended)

**Quick Setup (Automated):**
```bash
# Run on r630-01 directly
./scripts/setup-ceph-osds-r630.sh

# Or run remotely
./scripts/run-ceph-osd-setup-remote.sh L@kers2010

# To include sdb disk as well
./scripts/run-ceph-osd-setup-remote.sh L@kers2010 --include-sdb
```

**Manual Setup:**
1. **Verify disk status**: Run `analyze-r630-disk-layout.sh`
2. **Wipe disks** (if needed): `wipefs -a /dev/sdX`
3. **Create OSDs**: `ceph-volume lvm create --data /dev/sdX`
4. **Verify**: `ceph osd tree`

**What the automated script does:**
- Checks prerequisites (Ceph installed, cluster accessible)
- Verifies all 6 SSDs (sdc-sdh) are available
- Optionally prepares sdb (removes LVM signature)
- Creates OSDs on all available disks
- Enables and starts OSD services
- Verifies Ceph health and OSD status

### For Proxmox Storage
1. **Format disks**: Use `format-ssds-and-check-proxmox.sh`
2. **Add to Proxmox**: Datacenter > Storage > Add
3. **Choose type**: Directory, LVM, or ZFS

### For Mixed Use
- Use `sdb` for Proxmox storage
- Use `sdc-sdh` for Ceph OSDs
- Keep `sda` as system disk

## Related Scripts

### Analysis & Verification
- `scripts/analyze-r630-disk-layout.sh` - Comprehensive disk analysis
- `scripts/check-proxmox-storage.sh` - Quick Proxmox storage check
- `scripts/verify-r630-disks.sh` - Disk verification for Ceph

### Ceph OSD Setup
- `scripts/setup-ceph-osds-r630.sh` - **Main setup script** (run on r630-01)
- `scripts/run-ceph-osd-setup-remote.sh` - Remote execution helper
- `scripts/create-ceph-osds-all-drives.sh` - Alternative OSD creation script
- `scripts/create-all-osds-efficient.sh` - Efficient OSD creation

### Proxmox Storage
- `scripts/format-ssds-and-check-proxmox.sh` - Format disks for Proxmox

## Notes

- All disk sizes are approximate (decimal vs binary)
- Check actual status with `lsblk` or analysis script
- Always verify before making changes to disk layout
- Backup important data before repartitioning