Reactive Group Solid State Disks Ltd SCSIFLASH Arraid, LLC SCSI SDD


Honeywell Multiplex Interface (HISI)

The Arraid AEM-3 system provides a new and warranted equipment replacement for drives that adhere to the Honeywell Multiplex Interface, also known as HISI.

The AEM-3 is plug-compatible with original and refurbished HISI drives, while using ARRAID's proprietary solid state 'ARRAID Flash Drive' (AFD) to store data.  Internal AEM rotating drives can still supported.

No host system software or controller changes are required to install the AEM-3.

Capacities: 40MB to several hundred megabytes

Get the AEM-3 Data Sheet

Manufacturer: Arraid, LLC

The AEM-3 provides a complete bridge between the host HISI controller and the AEM's SCSI drives. HISI interface drives were widely used on DPS-6, Level 6 and similar computers from Bull and Honeywell Information Systems. HISI interface drives are still in use today on systems with specialized functions and custom software, making it impractical to re-host the complete computer system.

Originally built as free standing floor models with removable disk packs, these drives were also produced in rack mount with removable packs, fixed - sealed media, or a combination of both. Capacities ranged from 40MB to several hundred megabytes and were built by Bull, Honeywell, CDC and MPI.

While refurbished HISI drive replacements are available, refurbished HISI drives commonly fail within a few months resulting in system down time. The AEM-3 is provided as new equipment, with a warranty, and MTBF of 200,000+ hours and significantly more when using the solid state AFD.

 Additional AEM-3 options include disk to disk backup, disk to tape backup, AFD network (backup & restore) and mirroring. No refurbished SMD replacement can match the reliability, features and customer support provided by choosing the AEM-3 to replace your aging HISI disk drives.

Contact Arraid today to learn more about new drive replacements for aging computer systems.



Features and Benefits

  • Replaces aging and refurbished SMD drives with new data storage technology.
  • ARRAID Flash Drive (AFD) option is a Solid State SCSI disk replacing traditional mechanical SCSI drives (DAT, QIC, Tape & Magneto Optical Disk)
  • Additional features such as network backup, mirroring, restore and removable media can be added.
  • The CompactFlash (CF) media in the ARRAID Flash Drive (AFD) is treated exactly the same as the floppy disk media. All drive data is stored on the CF media as if were the original diskette media.
  • AFD network feature option offers LAN network (ethernet-based) back-up and restore capability directly from the AFD using the on board RJ45 Network port. No additional software or register changes are required to the legacy host. Including ARRAIDs FLASH2GUI Software, an optional ethernet support feature for centralised backup and restore capability lessening the reliance to rotate media.  Network option only available on AEM with AFD network drive installed. 
  • Easy to install. No hardware or software changes required, other than the drive itself.
    • Can replace or be added to existing drives.
  • Operating system, application and diagnostic software are supported as is.
  • An LED or Alpha-Numeric Operator Panel provides the same controls as the original drive.
    • Minimal Operator training required.
  • High reliability with near zero maintenance required.
    • Greater computer system availability with lower cost of ownership.
  • AEM-3 data storage can be to removable media, regardless of the original media. Ideal for secure applications.
  • Greatly reduced power consumption compared to old wash-tub drives.
  • The AEM is configured using internal software. The same model will emulate a wide range of disk drives.
    • System disk capacity may be increased if required.
    • Using the same AEM model for several drives limits the spares requirement.


For More Information

Get the AEM-3 Data Sheet

Learn how the AEM- replaces the Honeywell Bull HISI drive interface using Disk Drive Emulation.

Unable to determine if the AEM-3 is right for your application? Contact Arraid representatives here

Can Replace

A Brief List of Some of the SMD Drives the AEM-3 Can Replace (Manufacturer and Drive Models) 

CDC HISI - 9515, 9616, 9760, 9762, 9764, 9766

Standard Models and Enclosures

AEM-3 Versions

  • The AEM-3A will emulate disk drives, with track lengths up to 32KB and transfer rates <2MB/sec. Capacities range from 40MB to 1GB.
  • The AEM-3C is a fully cached version of the AEM and can be configured to emulate most standard drives. Like the 3A, the AEM-3C will emulate all standard drives with improved performance due to caching.



Mounting for Primary SCSI Storage Device

The legacy disk drive image is stored on the primary SCSI storage device. ARRAID would reccommend our proprietary FPGA based ARRAID Flash Drive (AFD). AEM-3 Systems may be configured with either fixed or removable SCSI disk drives as the primary SCSI storage device. ARRAID FLASH Drive (AFD) are ordered separately. The AFD also offers  backup and restore networking. For **F enclosures, the drive is fixed mounted inside the system enclosure. **RM enclosures include drive bays for removable disk drive modules. The drive bays have a key lock switch for mechanical and electrical interlock. The Customer can have the convenience of removability for security or media distribution, regardless of the construction of the original disk drive.

SCSI Storage Devices

SCSI Storage Devices

An AEM-3 System always requires a primary SCSI storage device and may require one or more additional devices for split media support or internal copy/backup. Because of the variety of SCSI products available, all AEM SCSI devices must be defined separately from the AEM.

The suggested choice for the primary storage device is a the Arraid Flash Drive (AFD). The drive may be in a fixed internal mounting or in a removable drive canister.

The solid state Arraid Flash Drive (AFD) can be configured as a Disk, Tape or Magneto-Optical drive and has proven successful as the primary storage device in many applications, especially when used in a fully cached AEM-3. Excellent as internal copy/backup devices, these drives and industrial grade CompactFlash (CF) media have the durability to perform well for many years. The ARRIAD Flash Drive AFD is available in only available for fixed or removable media mounting.

The ARRAID Flash Drive (AFD) also offers a direct replacement for the DDS2/ DDS3 DAT drives as internal backup devices.

Internal Options - Copy/Backup

The AEM-3 supports a number of internal options that provide the capability to copy the legacy disk image from the primary SCSI device to a second SCSI device. The copying takes place internally to the AEM, and is independent of the Customer's operating software or hardware. Usually used for system backup, these options can greatly reduce or eliminate the need for a magnetic tape drive on the system.

  • NETWORK FEATURE - AFD network feature option offers LAN network (ethernet-based) back-up and restore capability directly from the AFD using the on board RJ45 Network port. No additional software or register changes are required to the legacy host. Includes FLASH2GUI Software which is an optional ethernet support feature for centralised backup and restore capability removing the need to rotate media. Primary data storage is always written to the CF card. Only available on AEM with AFD drive installed.Disk-to-Disk Off-Line Copy - Allows the User to clone emulated disk images from the primary SCSI device to a second, usually identical, SCSI device for backup purposes.
  • Disk-to-Cartridge Media Disk Off-line Copy - Allows the User to clone emulated disk images from the primary SCSI device to a second SCSI device, such as an MO cartridge disk, for backup or distribution of media among similar systems.
  • Disk-to-Tape Off-line Backup - Allows the User to create a backup copy of the emulated disk image on DAT.
  • Disk-to-Disk On-Line Copy - Similar to mirroring, the AEM automatically maintains two copies of the emulated image on two SCSI hard drives for added reliability and fault tolerance.
  • Disk-to-Cartridge Media Disk On-line Copy - Allows the User to clone emulated disk images from the primary SCSI device to a second SCSI device, such as an MO cartridge disk, without taking the AEM off-line.
  • Combinations of Above Options

Other Internal Options

  • Fixed/Removable Emulation - Emulates those drives where the drive capacity is split between fixed platters and a removable cartridge.
  • Multi-Volume Support - Allows storage of multiple legacy disk images on one SCSI device.
  • Additional Crystals - The crystal controls the drive transfer rate. In cases where a spare drive must be reconfigurable to emulate several different legacy models in use, the Customer may require additional crystals.
  • Additional Track Buffers - Depending upon the Customer's application, caching a larger portion of the disk emulation in additional track buffers may improve performance.
  • Interface Connectors - Older SMD drives used large Amphenol block connecters rather than the now standard IDC.

External Options

  • Interface Cables
  • Cable Termination
  • Mounting Shelf
  • EU Certification

Contact Arraid Representative for advice and assistance in selecting AEM-3 Devices and Options.

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