# R630-01 fdisk Output - Detailed Disk Information

**Date**: Generated from `fdisk -l` command  
**Host**: r630-01 (192.168.11.11)

## Complete fdisk Output

```
Disk /dev/sda: 279.4 GiB, 300000000000 bytes, 585937500 sectors
Disk model: ST9300653SS     
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 3BB9B517-B595-4B69-9D31-468622AD51F9

Device       Start       End   Sectors  Size Type
/dev/sda1       34      2047      2014 1007K BIOS boot
/dev/sda2     2048   2099199   2097152    1G EFI System
/dev/sda3  2099200 585105408 583006209  278G Linux LVM


Disk /dev/sdb: 279.4 GiB, 300000000000 bytes, 585937500 sectors
Disk model: HUC106030CSS600 
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/sde: 232.89 GiB, 250059350016 bytes, 488397168 sectors
Disk model: CT250MX500SSD1  
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes


Disk /dev/sdc: 232.89 GiB, 250059350016 bytes, 488397168 sectors
Disk model: CT250MX500SSD1  
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes


Disk /dev/sdd: 232.89 GiB, 250059350016 bytes, 488397168 sectors
Disk model: CT250MX500SSD1  
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes


Disk /dev/sdh: 232.89 GiB, 250059350016 bytes, 488397168 sectors
Disk model: CT250MX500SSD1  
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes


Disk /dev/sdg: 232.89 GiB, 250059350016 bytes, 488397168 sectors
Disk model: CT250MX500SSD1  
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes


Disk /dev/sdf: 232.89 GiB, 250059350016 bytes, 488397168 sectors
Disk model: CT250MX500SSD1  
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes


Disk /dev/mapper/pve-swap: 8 GiB, 8589934592 bytes, 16777216 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/mapper/pve-root: 79.5 GiB, 85358280704 bytes, 166715392 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
```

## Disk Analysis

### System Disk: `/dev/sda` (279.4 GiB)
- **Model**: ST9300653SS (Seagate 300GB SAS)
- **Partition Table**: GPT
- **Disk Identifier**: 3BB9B517-B595-4B69-9D31-468622AD51F9
- **Sector Size**: 512 bytes (logical/physical)
- **Partitions**:
  - `/dev/sda1`: 1007K (sectors 34-2047) - BIOS boot partition
  - `/dev/sda2`: 1G (sectors 2048-2099199) - EFI System partition
  - `/dev/sda3`: 278G (sectors 2099200-585105408) - Linux LVM
- **LVM Volumes**:
  - `/dev/mapper/pve-swap`: 8 GiB
  - `/dev/mapper/pve-root`: 79.5 GiB

### Secondary Disk: `/dev/sdb` (279.4 GiB)
- **Model**: HUC106030CSS600 (Hitachi/HGST 300GB SAS)
- **Status**: No partition table (raw disk)
- **Sector Size**: 512 bytes (logical/physical)
- **Available**: Ready for use (may have LVM signature)

### SSD Storage Disks: `/dev/sdc` through `/dev/sdh` (6x 232.89 GiB)
- **Model**: CT250MX500SSD1 (Crucial MX500 250GB SSD)
- **Total Capacity**: ~1.4TB (6 x 232.89 GiB)
- **Sector Size**: 512 bytes logical / 4096 bytes physical (4K native)
- **I/O Size**: 4096 bytes (optimal for SSDs)
- **Status**: All 6 disks are raw (no partition tables)
- **Devices**:
  - `/dev/sdc`: 232.89 GiB
  - `/dev/sdd`: 232.89 GiB
  - `/dev/sde`: 232.89 GiB
  - `/dev/sdf`: 232.89 GiB
  - `/dev/sdg`: 232.89 GiB
  - `/dev/sdh`: 232.89 GiB

## Key Observations

1. **System Disk (`/dev/sda`)**: 
   - Properly partitioned with GPT
   - Contains Proxmox VE installation with LVM
   - Has both BIOS boot and EFI System partitions (dual-boot capable)

2. **Secondary Disk (`/dev/sdb`)**:
   - No partition table detected
   - May contain LVM signature that needs to be wiped for Ceph use

3. **SSD Array (`/dev/sdc-sdh`)**:
   - All 6 SSDs are identical (Crucial MX500 250GB)
   - 4K native physical sector size (optimal for modern SSDs)
   - No partitions - ready for Ceph OSD creation
   - Total usable capacity: ~1.4TB

4. **LVM Volumes**:
   - `pve-swap`: 8GB swap space
   - `pve-root`: 79.5GB root filesystem
   - Additional space likely in `pve-data` volume (not shown in fdisk output)

## Recommendations

- **For Ceph**: Use all 6 SSDs (`sdc-sdh`) for OSDs
- **For `/dev/sdb`**: Wipe LVM signature if present before using for Ceph
- **System Disk**: Keep `/dev/sda` as-is for Proxmox VE OS

## Related Documentation

- [R630-01 Disk Layout Reference](./r630-01-disk-layout.md) - Overview and recommendations
- [Ceph OSD Setup Documentation](../ceph/) - Ceph configuration guides

