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ATTO Software Downloads Archive

The following are archived versions of ATTO drivers and software.

Click here for current ATTO drivers and software. Drivers and software for discontinued ATTO products are here.

If a driver or software package does not appear on this list, it may still be available by contacting ATTO Tech Support.

Select an ATTO Product plus a Product Family to begin:

The current sort appears below. SEARCH the sorted file listing using the search box (when each sort filter is set to “all”, all files are searched).

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Title
Celerity 16/32/64Gb Fibre Channel MultiPath Director Driver macOS – DEXT

Files in Package:
  • Driver Version (v1.03-MP) 3.93 MB
  • Product Release Notes 125.32 KB
 ATTO MultiPath Director is a proprietary driver that enables macOS hosts to connect to storage systems that support ALUA for failover, failback and load balancing across Fibre Channel ports.

Supports the following macOS Versions: macOS 26 Tahoe. 		Download
Celerity 16/32/64Gb Fibre Channel MultiPath Director Driver macOS – KEXT

Files in Package:
  • Driver Version (v3.16-MP) 2.76 MB
  • Product Release Notes 282.29 KB
 ATTO MultiPath Director is a proprietary driver that enables macOS hosts to connect to storage systems that support ALUA for failover, failback and load balancing across Fibre Channel ports.

Supports the following macOS Versions: macOS 15 Sequoia, macOS 14 Sonoma & macOS 13 Ventura.

In macOS 11, Apple introduced User-Approved Kernel Extension Loading. For additional information on this update, please visit here.

When installing an ATTO kext driver on macOS, you may get a pop-up message warning stating that “this is a system extension that will be incompatible with a future version of macOS.” There is no need to be concerned. ATTO currently uses Kernel Extension Drivers to provide the highest-performing drivers possible. 		Download
ExpressNVM Driver Linux

Files in Package:
  • Driver Version (v1.04.13) 10.2 MB
  • Product Release Notes 204.93 KB
 Linux management driver for ExpressNVM S4FF & S48F Switch Adapters.

Supports the following Linux Distributions: Red Hat Enterprise Linux 8, 9 & 10, Rocky Linux 8, 9 & 10, SUSE Linux Enterprise Server 15 & 16, openSUSE LEAP 15 & 16, Ubuntu 22.04 LTS & 24.04 LTS. 		Download
ExpressSAS 12Gb GT Driver Linux

Files in Package:
  • Driver Version (v1.12.12) 1.18 MB
  • Product Release Notes 188.82 KB
 Proprietary Linux device driver for ExpressSAS 12Gb GT Host Bus Adapters.

Supports the following Linux Distributions: RHEL 8, 9, 10, Rocky Linux 8, 9, 10, openSUSE LEAP 15, 16, SLES 15, 16 & Ubuntu 22.04, 24.04. 		Download
ExpressSAS 12Gb GT Driver macOS – Dext

Files in Package:
  • Driver Version (v2.01) 3.34 MB
  • Product Release Notes 122.85 KB
 macOS Dext driver for ExpressSAS 12Gb GT Host Bus Adapters.

Supports the following macOS Versions: macOS 26 Tahoe. 		Download
ExpressSAS 12Gb GT Driver macOS – Kext

Files in Package:
  • Driver Version (v1.11.3) 2.07 MB
  • Product Release Notes 201.05 KB
 macOS Kext driver for ExpressSAS 12Gb GT Host Bus Adapters.

Supports the following macOS Versions: macOS 15 Sequoia, macOS 14 Sonoma & macOS 13 Ventura.

In macOS 11, Apple introduced User-Approved Kernel Extension Loading. For additional information on this update, please visit here.

When installing an ATTO driver on macOS, you may get a pop-up message warning stating that “this is a system extension that will be incompatible with a future version of macOS.” There is no need to be concerned. ATTO currently uses Kernel Extension Drivers to provide the highest-performing drivers possible. 		Download
ExpressSAS 12Gb GT Driver Windows

Files in Package:
  • Driver Version (v1.10) 4.31 MB
  • Product Release Notes 179.84 KB
 Windows device driver for ExpressSAS 12Gb GT Host Bus Adapters.

Supports the following versions of Windows: Windows 10, 11, Windows Server 2016, 2019, 2022 & 2025. 		Download
ExpressSAS 12Gb GT WHQL Driver Windows 10

Files in Package:
  • WHQL Driver version (v1.00) 13.51 MB
 Windows Hardware Quality Labs (WHQL) driver for ExpressSAS 12Gb GT Host Bus Adapters.

Supports the following versions of Windows: Windows 10 		Download
ExpressSAS 12Gb GT WHQL Driver Windows 2019

Files in Package:
  • WHQL Driver version (v1.00) 13.51 MB
 Windows Hardware Quality Labs (WHQL) driver for ExpressSAS 12Gb GT Host Bus Adapters.

Supports the following versions of Windows: Windows Server 2019
 		Download
ExpressSAS 24Gb Driver FreeBSD Archive

Files in Package:
  • fbsd_drv_esashba6_1000f1.txz (v1.00) 895.66 KB
  • ExpressSAS 24Gb Driver FreeBSD Archive PRN 149.66 KB
 Archived Proprietary FreeBSD device driver for ExpressSAS 24Gb Host Bus Adapters.

Supports the following FreeBSD versions: FreeBSD 12 (minimum 12.4) & FreeBSD 13 (minimum 13.1). 		Download
ExpressSAS 24Gb Driver illumos Archive

Files in Package:
  • ilm_drv_esashba6_1000f1.tgz (v1.00) 889.88 KB
  • ExpressSAS 24Gb Driver Illumos Archive PRN 148.83 KB
 Archived Proprietary illumos device driver for ExpressSAS 24Gb Host Bus Adapters.

Supports the following illumos versions: OpenIndiana, OmniOS, NexentaStor 4, NexentaStor 5, NestOS.

More information can be found in the ATTO ExpressSAS 24Gb SAS Adapter Illumos ReadMe file downloaded with the driver. 		Download
ExpressSAS 24Gb Driver Linux

Files in Package:
  • Driver version (v1.01) 1.17 MB
  • Product Release Notes 147.84 KB
 Proprietary Linux device driver for ExpressSAS 24Gb Host Bus Adapters.

Supports the following Linux Distributions: Red Hat Enterprise Linux 8 & 9, Rocky Linux 8 & 9, openSUSE Leap 15, SUSE Linux Enterprise Server 15, Ubuntu 22.04.

More information can be found in the ATTO ExpressSAS 24Gb SAS Adapter Linux ReadMe file downloaded with the driver. 		Download
ExpressSAS 24Gb Driver Linux Archive

Files in Package:
  • Driver Version: (v1.00) 1.08 MB
  • Product Release Notes 150.08 KB
 Archived Proprietary Linux device driver for ExpressSAS 24Gb Host Bus Adapters.

Supports the following Linux Distributions: Red Hat Enterprise Linux 8 & 9, Rocky Linux 8 & 9, openSUSE Leap 15, SUSE Linux Enterprise Server 15, Ubuntu 22.04.

More information can be found in the ATTO ExpressSAS 24Gb SAS Adapter Linux ReadMe file downloaded with the driver. 		Download
ExpressSAS 24Gb Driver macOS – Dext

Files in Package:
  • Driver Version (v1.02) 3.89 MB
  • Product Release Notes 121.59 KB
 macOS Dext driver for ExpressSAS 24Gb Host Bus Adapters.

Supports the following macOS Versions: macOS 26 Tahoe. 		Download
ExpressSAS 24Gb Driver macOS – Kext

Files in Package:
  • Driver Version (v1.03.3) 2.32 MB
  • Product Release Notes 161.62 KB
 macOS Kext driver for ExpressSAS 24Gb Host Bus Adapters.

Supports the following macOS Versions: macOS 15 Sequoia, macOS 14 Sonoma & macOS 13 Ventura.

In macOS 11, Apple introduced User-Approved Kernel Extension Loading. For additional information on this update, please visit here.

When installing an ATTO driver on macOS, you may get a pop-up message warning stating that “this is a system extension that will be incompatible with a future version of macOS.” There is no need to be concerned. ATTO currently uses Kernel Extension Drivers to provide the highest-performing drivers possible. 		Download
ExpressSAS 24Gb Driver macOS Archive

Files in Package:
  • Driver version: (v1.01) 3.41 MB
  • Product Release Notes 149.7 KB
 Archived macOS device driver for ExpressSAS 24Gb Host Bus Adapters.

Supports the following macOS Versions: macOS 15 Sequoia, macOS 14 Sonoma & macOS 13 Ventura.

In macOS 11, Apple introduced User-Approved Kernel Extension Loading. For additional information on this update, please visit here.

When installing an ATTO driver on macOS, you may get a pop-up message warning stating that “this is a system extension that will be incompatible with a future version of macOS.” There is no need to be concerned. ATTO currently uses Kernel Extension Drivers to provide the highest-performing drivers possible. 		Download
ExpressSAS 24Gb Driver Windows Archive

Files in Package:
  • Driver version (v1.00) 4.02 MB
  • Product Release Notes 148.88 KB
 Archived Windows device driver for ExpressSAS 24Gb Host Bus Adapters.

Supports the following versions of Windows: Windows 10, 11 & Windows Server 2019, 2022. 		Download
ExpressSAS 24Gb Flash Bundle FreeBSD Archive

Files in Package:
  • fbsd_fls_esashba6_240927.txz 3.78 MB
  • ExpressSAS 24Gb Flash Bundle FreeBSD Archive PRN 104.92 KB
 Archived FreeBSD flash bundle for ExpressSAS 24Gb Host Bus Adapters.

Instructions on how to flash can be found in the ReadMe downloaded with the flash bundle file.

Supported Products: ExpressSAS H24F0, ExpressSAS H240F & ExpressSAS H240N. 		Download
ExpressSAS 24Gb Flash Bundle illumos Archive

Files in Package:
  • ilm_fls_esashba6_240927.tgz 10.77 MB
  • Product Release Notes 104.92 KB
 Archived illumos flash bundle for ExpressSAS 24Gb Host Bus Adapters.

Instructions on how to flash can be found in the ReadMe downloaded with the flash bundle file.

Supported Products: ExpressSAS H24F0, ExpressSAS H240F & ExpressSAS H240N. 		Download
ExpressSAS 24Gb Flash Bundle Linux Archive

Files in Package:
  • Flash Bundle Version: (v09/27/2024) 10.77 MB
  • Product Release Notes 104.92 KB
 Archived Linux flash bundle for ExpressSAS 24Gb adapters.

Instructions on how to flash can be found in the ReadMe downloaded with the flash bundle file.

Supported Products: ExpressSAS H24F0, ExpressSAS H240F & ExpressSAS H240N. 		Download

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