# VTL Linux - Installation Guide

## Prerequisites

- x86_64 compatible hardware
- Minimum 2GB RAM (4GB+ recommended)
- 50GB+ storage for tape media
- Network interface card
- USB drive or CD/DVD for installation media

## Installation Methods

### Method 1: Live Boot (Testing)

1. Write ISO to USB drive:
   ```bash
   dd if=VTL-Linux-1.0-x86_64.iso of=/dev/sdX bs=4M status=progress
   sync
   ```

2. Boot from USB drive

3. System will boot into live environment with VTL services

### Method 2: Full Installation

1. Boot from ISO

2. Select "Install VTL Linux to Disk" from boot menu

3. Follow installation prompts:
   - Select target disk
   - Configure network
   - Set hostname
   - Create user account

4. Reboot after installation

## Post-Installation Configuration

### 1. Network Setup

Configure static IP (recommended for iSCSI):

```bash
sudo nmcli con mod "Wired connection 1" \
  ipv4.addresses 192.168.1.100/24 \
  ipv4.gateway 192.168.1.1 \
  ipv4.dns "8.8.8.8 8.8.4.4" \
  ipv4.method manual

sudo nmcli con up "Wired connection 1"
```

### 2. Change Default Passwords

```bash
sudo passwd root
sudo passwd vtladmin
```

### 3. Configure mhvtl

Edit device configuration:
```bash
sudo vim /etc/mhvtl/device.conf
```

Restart mhvtl service:
```bash
sudo systemctl restart mhvtl
```

### 4. Configure iSCSI Targets

Edit target configuration:
```bash
sudo vim /etc/tgt/conf.d/vtl-targets.conf
```

Update credentials:
```bash
incominguser <username> <password>
```

Restart tgt service:
```bash
sudo systemctl restart tgt
```

### 5. Verify Installation

Check system status:
```bash
vtl-status
```

List SCSI devices:
```bash
lsscsi -g
```

Check library status:
```bash
mtx -f /dev/sg0 status
```

View iSCSI targets:
```bash
tgt-admin --show
```

## Client Configuration

### Linux Client

1. Install iSCSI initiator:
   ```bash
   sudo apt-get install open-iscsi
   ```

2. Discover targets:
   ```bash
   sudo iscsiadm -m discovery -t st -p <VTL_IP>:3260
   ```

3. Login to target:
   ```bash
   sudo iscsiadm -m node --login
   ```

4. Configure CHAP authentication (if required):
   ```bash
   sudo iscsiadm -m node -T <target_iqn> -p <VTL_IP>:3260 \
     --op=update --name node.session.auth.authmethod --value=CHAP
   
   sudo iscsiadm -m node -T <target_iqn> -p <VTL_IP>:3260 \
     --op=update --name node.session.auth.username --value=vtl-user
   
   sudo iscsiadm -m node -T <target_iqn> -p <VTL_IP>:3260 \
     --op=update --name node.session.auth.password --value=vtl-password
   ```

5. Verify connection:
   ```bash
   lsscsi
   ```

### Windows Client

1. Open iSCSI Initiator (Control Panel → Administrative Tools)

2. Go to Discovery tab, click "Discover Portal"

3. Enter VTL server IP address and port 3260

4. Go to Targets tab, select discovered target

5. Click "Connect"

6. For CHAP authentication:
   - Click "Advanced"
   - Enable CHAP login
   - Enter username: vtl-user
   - Enter password: vtl-password

7. Verify in Device Manager under "Tape drives"

## Backup Software Configuration

### Bacula

```bash
Device {
  Name = VTL-Drive-0
  Media Type = LTO-5
  Archive Device = /dev/nst0
  AutomaticMount = yes
  AlwaysOpen = yes
  RemovableMedia = yes
  RandomAccess = no
  AutoChanger = yes
}

Autochanger {
  Name = VTL-Library
  Device = VTL-Drive-0, VTL-Drive-1, VTL-Drive-2, VTL-Drive-3
  Changer Command = "/usr/lib/bacula/scripts/mtx-changer %c %o %S %a %d"
  Changer Device = /dev/sg0
}
```

### Amanda

```bash
tapedev "chg-robot:/dev/sg0"
tpchanger "chg-robot"
changerfile "/var/lib/amanda/vtl/changer"
```

### Veeam (Windows)

1. Add tape server in Veeam console
2. Rescan tape infrastructure
3. VTL devices should appear automatically
4. Configure media pools and backup jobs

## Troubleshooting

### mhvtl not starting

```bash
sudo modprobe mhvtl
sudo systemctl status mhvtl
sudo journalctl -u mhvtl -n 50
```

### iSCSI connection issues

```bash
sudo systemctl status tgt
sudo tgt-admin --show
sudo netstat -tlnp | grep 3260
```

### SCSI devices not visible

```bash
sudo modprobe sg
lsmod | grep mhvtl
dmesg | grep -i scsi
```

### Performance issues

Check system resources:
```bash
htop
iostat -x 1
iotop
```

Adjust kernel parameters in `/etc/sysctl.d/99-vtl.conf`

## Maintenance

### Adding tape media

```bash
sudo /usr/bin/mktape -l 10 -s 100 -m /opt/mhvtl -t LTO5 -d 10
sudo systemctl restart mhvtl
```

### Backup configuration

```bash
sudo tar -czf vtl-config-backup.tar.gz \
  /etc/mhvtl/ \
  /etc/tgt/conf.d/ \
  /etc/sysctl.d/99-vtl.conf
```

### Update system

```bash
sudo apt-get update
sudo apt-get upgrade
sudo reboot
```

## Support

For issues and questions:
- Check logs: `journalctl -xe`
- Review documentation in `/vtl/docs/`
- mhvtl documentation: https://github.com/markh794/mhvtl