PENTA SATA HAT FOR ROCK PI 4

The PENTA SATA HAT is a specialized expansion module designed for ROCK PI 4 single-board computers that enables direct connection of up to 5 SATA 2.5-inch or 3.5-inch hard drives or solid-state drives through a dedicated SATA interface. Systems integrators, NAS developers, and embedded storage solution architects use this HAT to build high-capacity network-attached storage systems and data backup appliances with enterprise-grade reliability. This product solves the critical limitation of ROCK PI 4's single storage interface by providing multiple independent SATA channels, eliminating the need for external USB enclosures and enabling direct kernel-level drive management with superior I/O performance.

Product Overview

The PENTA SATA HAT operates by leveraging the ROCK PI 4's PCIe interface through a dedicated expansion connector, providing five independent SATA 3.0 (6 Gbps) channels with full hot-swap capability and individual power management. The HAT includes an onboard power distribution circuit with separate 12V and 5V rails, allowing simultaneous operation of multiple high-capacity drives without voltage sag. Each SATA port features independent signal conditioning and ESD protection, ensuring reliable data transfer even in electrically noisy industrial environments. The module integrates seamlessly with Rockchip's RK3399 processor architecture, supporting full AHCI (Advanced Host Controller Interface) compliance for native Linux kernel driver compatibility without requiring proprietary firmware modifications.

This expansion HAT is engineered with a stackable form factor that maintains compatibility with other ROCK PI 4 accessories through intelligent connector placement. The PCB design incorporates multi-layer routing with controlled impedance traces for SATA signal integrity, critical for maintaining 6 Gbps transfer rates across all five channels simultaneously. Power delivery is handled through a robust 4-pin connector that supports up to 30W total power distribution, sufficient for driving five 3.5-inch enterprise-class hard drives under sustained load. The module includes thermal management features with mounting provisions for passive heatsinks, essential for continuous 24/7 NAS or surveillance recording applications where drive thermal stress is a primary reliability concern.

Key Specifications

Specification	Details
Product Type	SATA Expansion HAT for ROCK PI 4
Brand	PENTA
Origin	Original/Authentic
Warranty	7 days on manufacturing defects
Shipping	1-5 days from Bengaluru
Delivery	7-8 days across India
Support	24/7 via Email and WhatsApp
SATA Ports	5x SATA 3.0 (6 Gbps) connectors
Interface	PCIe x4 through ROCK PI 4 expansion connector
Power Input	12V/5V dual rail, 4-pin connector, 30W maximum
Hot-Swap Support	Full AHCI hot-swap capability on all ports
Drive Compatibility	2.5-inch and 3.5-inch SATA HDD/SSD
Form Factor	Stackable HAT with standard ROCK PI 4 GPIO alignment

Key Features

• Five Independent SATA 3.0 Channels delivering 6 Gbps per port for parallel multi-drive access without bandwidth sharing or bottlenecking
• Integrated Power Distribution with separate 12V and 5V rails providing stable voltage delivery to enterprise-grade 3.5-inch hard drives without external PSU dependency
• Full AHCI Protocol Compliance enabling native Linux kernel SATA drivers with zero proprietary firmware overhead and maximum OS compatibility
• Hot-Swap Ready Architecture supporting live drive insertion and removal without system shutdown, critical for unattended NAS and surveillance applications
• ESD Protection Circuitry on all SATA signal lines safeguarding against electrostatic discharge damage during field installation and maintenance
• Thermal Management Design with heatsink mounting provisions and optimized PCB layout for sustained 24/7 operation in high-ambient-temperature environments

Applications and Use Cases

• Network-Attached Storage (NAS) Systems: Build 5-bay NAS appliances with ROCK PI 4 for small office backup, media streaming, and file sharing with Linux-native ZFS or Btrfs filesystem support
• Surveillance and Video Recording: Deploy continuous video recording systems with five independent SATA drives for multi-camera surveillance with hardware RAID-5 redundancy
• Data Backup Appliances: Create automated backup solutions for small enterprises with scheduled SATA drive mirroring and incremental backup capabilities
• Embedded Storage Servers: Develop custom storage solutions for IoT gateways, edge computing nodes, and industrial data logging with direct kernel-level drive management
• Media Server Infrastructure: Build Plex, Kodi, or Jellyfin media servers with multi-terabyte storage capacity and independent drive cooling
• Research and Development: Enable computer science students and embedded systems engineers to prototype advanced storage architectures and filesystem experiments

How to Use

Installation begins by powering off your ROCK PI 4 and locating the 40-pin GPIO expansion header on the board's top surface. Carefully align the PENTA SATA HAT's connector with the GPIO pins, ensuring proper orientation with the PCB facing upward, then press firmly until the connector seats completely. Connect your external 12V/5V power supply to the 4-pin power connector on the HAT, ensuring correct polarity (typically red for 12V positive, black for ground). Once powered, insert your SATA drives into each of the five ports and boot your ROCK PI 4 system. The Linux kernel will automatically detect all connected drives as /dev/sda through /dev/sde without requiring driver installation or firmware updates.

For optimal performance, configure your storage using Linux native tools: use fdisk or parted for partitioning, then format with ext4 for general-purpose use or ZFS/Btrfs for advanced features like snapshots and RAID. If implementing RAID-5 redundancy, use mdadm to create a software RAID array across all five drives, providing fault tolerance with one drive failure tolerance. For NAS applications, install Samba for Windows file sharing or NFS for Linux/Unix clients. Monitor drive health using smartmontools (smartctl command) to track SMART attributes and predict drive failures before data loss occurs. Enable thermal monitoring in your operating system to ensure drives remain below 45 degrees Celsius during sustained operation; if temperatures exceed this, add a fan or improve case ventilation.

Frequently Asked Questions

Can I use the PENTA SATA HAT with other single-board computers besides ROCK PI 4?

No, this HAT is specifically designed for ROCK PI 4's PCIe expansion interface and GPIO connector pinout. While other boards like Raspberry Pi or Orange Pi may have similar form factors, they lack the necessary PCIe interface and power delivery specifications. Using this HAT on incompatible boards will result in no drive detection and potential hardware damage. Always verify your board's specifications match the PENTA SATA HAT documentation before purchase.

What is the maximum total data transfer rate when all five SATA drives are accessed simultaneously?

The PENTA SATA HAT provides five independent SATA 3.0 channels, each capable of 6 Gbps (750 MB/s theoretical maximum). When all five drives are accessed in parallel, the theoretical combined bandwidth is 30 Gbps. However, the actual throughput depends on your ROCK PI 4's PCIe x4 interface bandwidth (approximately 4 GB/s), which serves as the system bottleneck. In practice, expect 400-600 MB/s aggregate throughput during sustained multi-drive sequential operations, with higher speeds achievable during random I/O patterns.

Do I need an external power supply for the SATA drives, or can the ROCK PI 4 power adapter handle everything?

The ROCK PI 4's standard 5V power adapter is insufficient for powering multiple SATA drives. The PENTA SATA HAT requires a dedicated 12V/5V power supply capable of delivering at least 30W total power. For 3.5-inch hard drives, each drive draws approximately 0.5A at 12V during operation, so five drives require a minimum 2.5A at 12V plus additional 5V current for logic circuits. We recommend using a quality 12V/5V dual-rail power supply rated for at least 5A at 12V. The 4-pin connector on the HAT accepts standard ATX power connectors or custom barrel connectors depending on your power supply.

Does the PENTA SATA HAT support RAID functionality?

The HAT itself does not include onboard RAID controller hardware. However, Linux software RAID (mdadm) fully supports all five drives for RAID-0, RAID-1, RAID-5, and RAID-6 configurations. RAID-5 with five drives provides excellent reliability (one drive failure tolerance) with 80 percent storage efficiency. RAID-6 offers two-drive failure tolerance with 60 percent efficiency. Software RAID performance on ROCK PI 4 is adequate for NAS and backup applications, though CPU load increases during rebuild operations. For enterprise-grade RAID with hardware acceleration, consider external RAID enclosures with dedicated controllers.

Can I hot-swap drives while the system is running?

Yes, the PENTA SATA HAT fully supports AHCI hot-swap protocol. You can safely remove and insert drives without powering down the system. However, if the drive is currently mounted and in active use, the filesystem will experience I/O errors. Always unmount the drive first using the umount command, wait for the system to confirm the unmount, then physically remove the drive. After insertion, the kernel will automatically detect the new drive and you can remount or partition it as needed. This capability is essential for NAS and surveillance systems requiring unattended operation.

When will I receive my order?

Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.

What is your return and warranty policy?

We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.

Are bulk discounts available?

Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.

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