AEM-1, Plug-Compatible replacementsfor SMD  and SMD-E disk drives. Featuring: Self-test. SMD thru SMD-E interface compatibility 8 MB to 4.2 GB capacity - Defect Free  Data transfer rates up to 24 Mbits per second Single Port or Dual Port Available with fixed, removable, or Jaz drive Rack Mount or Table Top enclosure Data Erase per DoD 5220.22-M Continuous NEW capabilities Upgrade SMD drives. Optional Features: DAT,QIC tape, Jaz, or Magneto-Optical disk  100% Verified Backup to second disk, 4 mm RAID-1 Internal Mirroring and On-line Copy Multiple Volumes on a single drive Internal UPS.

PLUG COMPATIBLE with SMD or SMD-E Drives

No hardware or software modifications are required to use the latest SCSI drives on SMD and SMD-E controllers. Unplug the existing SMD disk drive and install the AEM-1, using the same cables. Requires no changes to the diagnostics or operating software.

The AEM-1 replaces most disk drives that use the industry standard SMD or SMD-E interface. It can be configured to emulate drives from Ampex, Century Data, Control Data, Imprimis/Seagate, Fujitsu, Hitachi, Memorex, NEC, Pertec, Priam, Wang, . . . and many others.

MANY CONFIGURATIONS AVAILABLE

The AEM-1 is a modular system and is available with numerous options. Two separate SMD drives can be emulated within one dual AEM-1 enclosure. Rack mount, table top, and custom mounting configurations are available.

CACHE BUFFERING for FAST ACCESS to Data

Up to 64 MB of data caching provides significantly reduced access times to common data. Cache is managed by a "Least Recently Used Track" algorithm.

HIGHER DATA TRANSFER RATES

Some host controllers are capable of data transfer rates well beyond those of the original SMD disk drive. The AEM-1 supports up to 24 Mbits per second which can provide a threefold increase in transfer rate when used with some controllers.

OFF-LINE BACKUP, DISK COPY

The off-line backup option allows the user to backup, copy, and verify the SMD image to a disk, tape, or cartridge unit. A 300 MB image can be copied in as little as five minutes to another removable SCSI or Jaz drive. Backing up the same 300 MB image to an internal 4 mm DAT or QIC tape takes as little as 10 minutes. 

DISK MIRRORING

RAID-1 internal Disk to Disk Mirroring is another option to the AEM-1. Alternating reads continually assure the user of a valid mirror. Internal Disk to Disk Mirroring also provides on-line, continuous backup of critical data.

REDUCED POWER and COOLING

The AEM-1 uses significantly less power and requires less cooling than the older SMD drives it replaces, up to 95% less in some cases. Floor space requirements can also be reduced up to 95%.

MULTI-VOLUME Option

With the Multi-Volume Option users can partition the SCSI drive to create multiple volumes. The supporting software also allows for copying between volumes. The external Multi-Volume switch indicates the selected active volume.

EASE of USE

User controls and indicators are similar to the original SMD disk drives. Operators already familiar with the various SMD drives will find the AEM-1 easy to work with.

FLEXIBLE ARCHITECTURE

The AEM-1 uses a combination of microprocessor control and Field Programmable Gate Array logic for optimum performance and flexibility. As a result, configuration changes and field upgrades can easily be implemented as software/firmware changes.

Dual AEM-1 Table Top unit with Removable Drives, Disk to Disk Copy, and Tape Backup options.

USER CONFIGURABLE

Drive emulation parameters may be changed by the user through an RS-232 serial port. For example; number of heads, cylinders, track size, sector size, etc., can be changed by the user. This allows the AEM-1 to be reconfigured in the field to emulate any one of many SMD drive models. Software updates and some optional features can be installed in the AEM-1 by downloading from a DOS compatible PC.

MAINTENANCE FREE

The AEM-1 carries a 2 year warranty and uses the latest technology SCSI disk drives for low maintenance operation. Disk drives carry a 1 year warranty, plus the remaining manufacture's warranty. Many drives are rated in excess of 500,000 hours MTBF.

Control/Maintaince: RS-232 serial port, ASCII DB-9 or modular connector.

DATA TRANSFER RATE

6 to 24 Mbits per second. Crystal controlled.

EMULATION All parameters programmable

Cylinders   1024 max SMD
                2048 max SMD-0
                4096 max SMD-E

Heads        64 max SMD
                  32 max SMD-E

Track Length   30,720 to 61,440 Bytes max 
                         (Soft sectored)
                      32,768 to 65,535 Bytes max
                         (Hard sectored)

Sector Length Programmable
                        0 - 32,768 Bytes

CACHE BUFFER
Size                    2 to 64 MBytes
Capacity           64 to 1024 Tracks

Track to Track                0 - 20 ms
Average                         4 - 18 ms
Maximum                       20 - 30 ms
Average Access         11 - 28 ms
Average Latency        6.2 - 8.4 ms

RELIABILITY
    MTBF             200,000+ hours
    MTTR             15 minutes

POWER
    Input Voltage  90 - 135, 180 - 264 VAC (Selectable)
    Frequency      47 - 63 Hz
    Power             50 - 90 Watts (Maximum)

PHYSICAL              High x Wide x Deep, Weight
    Rack Mount        5.25 in. x 19 in. x 25 in., 35 lbs
                             133 mm x 483 mm x 635 mm, 15.9 kg 
    Table Top             13.5 in. x 7.5 in. x 17 in., 29 lbs 
                             343 mm x 191 mm x 432 mm, 13.2 kg 
    Drive Module         1.7 in. x 4.6 in. x 8.2 in., 3 lbs 
                            43.2 mm x 117 mm x 208 mm, 1.4 kg

Specifications subject to change without notice.

COMMON OPTIONS

Opt-21        Dual Port SMD Interface
Opt-25        Multi-Volume Support
Opt-30        Internal UPS
Opt-41        Syquest (250 MB) Image Copy/Backup
Opt-46        Jaz Drive (1GB) Image Copy/Backup
Opt-51        Disk to Disk Image Copy 
Opt-55        RAID Disk Mirroring and On-line Copy
Opt-6X        Disk to Tape Backup (DAT, QIC)
Opt-7X        Disk to MO Disk Backup
TES-1         Tape Emulation System (see TES-1                      Data Sheet)

More Options Available.