1. はじめに
The Buffalo LinkStation 420 is a 2-drive Network Attached Storage (NAS) device designed for home and home office environments. It provides centralized storage and backup capabilities for both PC and Mac computers on your network. This device features a high-performance processor for fast data transfers, supports RAID for data protection, and offers media streaming functionalities. It also includes WebAccess for remote access to your files.

図1: 前面 view of the Buffalo LinkStation 420 NAS unit.
2. セットアップ
2.1. パッケージ内容
- Buffalo LinkStation 420 NAS Unit
- イーサネットケーブル
- ACアダプター
- クイックセットアップガイド
2.2. 物理的な設置
- イーサネットケーブルを接続します。 Plug one end of the included Ethernet cable into the LAN port on the back of the LinkStation and the other end into an available LAN port on your wireless router or network switch.
- ACアダプターを接続します: Plug the AC adapter into the DC-IN port on the back of the LinkStation, then plug the other end into a power outlet.
- 電源オン: Slide the power switch on the back of the unit to the 'ON' position. The power LED on the front panel will illuminate.

Figure 2: Rear panel of the LinkStation 420, showing Ethernet, USB, and power ports.
2.3. 初期設定
After powering on, the LinkStation will perform an initial setup, which may include formatting the drives. This process can take several hours depending on the drive capacity. Once complete, you can access the device's web 設定を構成するためのインターフェース。
- アクセス Web インタフェース: Use the Buffalo NAS Navigator software (available for download from the Buffalo website) to locate your LinkStation on the network and access its webに基づく管理インターフェイス。
- RAID 構成: The LinkStation 420 supports RAID 0 (striping) and RAID 1 (mirroring). While RAID 0 offers maximum capacity and speed, RAID 1 provides data redundancy by mirroring data across both drives, protecting against single drive failure. It is recommended to configure the device for RAID 1 for critical data. Changing RAID levels will erase all data on the drives.
- Time Machine Backup (Mac): The LinkStation can be configured as a Time Machine target for Mac computers. Refer to the device's web interface documentation for specific steps to enable and configure this feature.
3. 操作
3.1. Accessing Shared Storage
Once configured, the LinkStation creates network shares that can be accessed from any connected PC or Mac. You can map these shares as network drives on Windows or mount them as network volumes on macOS for easy file access and storage.
3.2.メディアストリーミング
The LinkStation 420 is DLNA Certified and can function as an iTunes server. This allows you to stream media content (photos, music, videos) stored on the NAS to compatible devices on your network, such as smart TVs, media players, and computers running iTunes.
3.3. Remote Access (Webアクセス)
Buffalo's WebAccess service enables you to create a personal cloud, providing remote access to your LinkStation files from anywhere with an internet connection. This feature supports access from web browsers and dedicated mobile applications for iPhone, iPad, and Android devices.

Figure 3: Front panel of the LinkStation 420, showing power and status indicators.

図4:右側 view of the LinkStation 420.
4. メンテナンス
4.1. Drive Management and Replacement
For optimal data protection, operating the LinkStation in a RAID 1 configuration is recommended. In the event of a drive failure, the RAID 1 array allows for continued operation and data access while the failed drive is replaced. Consult the device's web interface or full manual for the specific procedure to replace a drive and rebuild the RAID array.

図5: 図解 view of hard drive insertion into the LinkStation 420.
4.2. ファームウェアのアップデート
Regularly check for and install firmware updates for your LinkStation. Firmware updates can provide performance improvements, new features, and critical security patches. The device's web interface typically includes an option to check for and apply updates.
5。 トラブルシューティング
5.1. よくある問題
- Device Not Accessible on Network:
- すべてのネットワーク ケーブルがしっかりと接続されていることを確認します。
- Ensure the LinkStation is powered on.
- Check your router's DHCP client list to confirm the LinkStation has an IP address.
- Temporarily disable any firewall software on your computer to rule out interference.
- 転送速度が遅い:
- Ensure all network components (router, switches, network adapters) support Gigabit Ethernet.
- 多数の小さなものを転送しないでください file同時に実行しないでください。全体的な速度が低下する可能性があります。
- Check for background processes on the LinkStation or connected computers that might be consuming network bandwidth.
- Device Unresponsive or Crashing:
- Perform a soft reboot through the web インタフェース。
- If unresponsive, power cycle the device by unplugging it, waiting 30 seconds, and plugging it back in.
- 過熱を防ぐために、デバイスが換気の良い場所にあることを確認してください。
5.2. デバイスのリセット
If troubleshooting steps do not resolve the issue, a factory reset may be necessary. Be aware that a factory reset will erase all data and settings on the device. Consult the full user manual or Buffalo support website for instructions on performing a factory reset.
6. 仕様
| 特徴 | 仕様 |
|---|---|
| モデル番号 | LS420D0602 |
| デジタルストレージ容量 | 6000 GB(6 TB) |
| ハードディスクの説明 | 2x6TB, Desktop |
| 接続技術 | USB、イーサネット |
| ハードウェアの接続 | イーサネット、USB 2.0 |
| 読み取り速度 | 毎秒 80 メガバイト |
| 対応デバイス | Camera, Desktop, Smartphone, Tablet, Television |
| 色 | 黒 |
| アイテム重量 | 5.3 ポンド |
| メーカー | バッファロー |
7.保証とサポート
7.1. 保証情報
The Buffalo LinkStation 420 comes with a 3-year warranty. Please retain your proof of purchase for warranty claims.
7.2. テクニカルサポート
For technical assistance, please visit the official Buffalo support website or contact their customer service. Support resources typically include FAQs, knowledge bases, driver downloads, and contact information for direct assistance.