Maintain fast, direct access to SAS and SATA storage with a host bus adapter built for server expansion. The ATTO ESAH-1244-GT0 pairs 12 Gb SAS/SATA connectivity with a PCIe 4.0 x8 interface, giving infrastructure teams the bandwidth headroom needed for modern storage backplanes and external enclosures. Its 4 external and 4 internal ports support flexible deployment patterns, whether you are attaching internal drive cages, extending storage to external shelves, or segmenting workloads across multiple arrays. The low-profile form factor fits compact rack servers where slot space is limited and airflow matters. For teams standardizing on ATTO connectivity, this adapter is a practical choice when you need predictable storage access without moving to a full RAID stack. It is well suited to environments that value direct device control, clean cabling, and a controller footprint that fits enterprise chassis constraints. When uptime, serviceability, and expansion density all matter, this HBA gives you a disciplined path forward.