Tape drive storage system IBM RS6000 3490-E11
The 3490-E11 is a rack-mount version. See the Model E01 for the table-top version. This Enhanced Capability model is a substantially lower priced 3490E tape subsystem designed for the RS/6000* and AS/400*. The 3490E family of tapes are the fastest, most reliable tape systems available from IBM for AS/400 and for RS/6000. It includes a seven cartridge Cartridge Stack Loader, a 16-bit, fast-and-wide, SCSI-Differential Interface, a 3490E tape transport, and an integrated control unit. The maximum effective throughput is up to 6.5MB per second. The seven-cartridge Cartridge Stack Loader provides an automated, unattended backup capacity of up to 16.8 GB with compressible data. Uncompressed, the capacity is up to 5.6 GB. Compression is provided by the 3490E's IDRC data compression hardware.
IBM 3490 Tape System Family
The IBM 3490 is a family of Magnetic Tape Subsystems designed to provide significant tape subsystem performance and cartridge capacity improvements.
The 3490 Magnetic Tape Subsystem family offers solutions to business requirements in the areas of adaptability, maintenance, reliability and availability, usability, and exploitation. All 3490 Magnetic Tape Subsystems can attach to multiple processors and are supported by MVS, VM, AIX/ESA*, AIX/6000*, and OS/400*.
The IBM 3490 family's innovative packaging provides environmental characteristics that are far superior to those of previous tape technologies.
IBM 3490-E11 Highlights
- Data rate of 3 MB/sec (6.5 MB/sec typically with compression)
- 0.8 GB capacity per cartridge (2.4 GB typically with IDRC)
- Fast and wide SCSI-2 differential interface
- Reads and writes 36-track bidirectional recording format
- Reads 18-track tape cartridges
- Maximum operational efficiency with unattended backup of up to 16.8 GB of data using a standard seven-cartridge Cartridge Stack Loader
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High Performance
Using the 3490E's IDRC data compression, the 3490E Model E11 can provide an effective throughput as high as 6.5MB per second (Mileage may vary... actual throughput is a function of the system processor, data block size, and software used).
The fast and wide (16-bit) SCSI-2 differential interface supports peak data rates of up to 20MB per second. Both 8-bit and 16-bit transfer are supported. Using an interposer for 8-bit mode, peak data rates of up to 10MB per second are possible.
Speedy Backup and Restore
In the event of loss or damage to files on disk storage, the E11 allows you to quickly replace backed-up files, improving productivity and system availability.
Won't Fill Up Your Rack
The small size of the E11 makes efficient use of rack space. Two E11s can be mounted side-by-side in 8 EIA units. That leaves more space available for other devices in the same rack.
Error-Free Reading and Writing
The 3490-E11 incorporates a single pass read-after-write function in addition to extensive error correction functions. Read-after-write checks the data as it is written. Most errors can be corrected by the ICU as the tape is written. If a problem cannot be corrected, the tape unit retries and attempts to write (or read) the data correctly. If the problem remains uncorrectable, the operator is notified. The drive does not continue if data cannot be accurately recorded.
Save Time During Rewind
The 36-track bidirectional recording format can reduce or eliminate rewind time. The bidirectional head writes 18 tracks from the load point to the end of the tape and then writes the other 18 tracks from the end of the tape back to the load point, eliminating the rewind time for full tapes.
