Specifications

MDR User Guide 107
SCSI PMC Backup
The MDR uses the SCSI PMC module to provide connectivity to SCSI tape stations for
backup purposes.
SC-PMC/8X5 SCSI PMC Module
The SC-PMC/8X5 (X is 2 or 7) is a SCSI Adapter as a PCI Mezzanine Card (PMC) with
a direct interface to the 32-bit PCI local bus. The SC PMC/8X5 supports both SCSI-I
and SCSI-II. A narrow or wide single-ended interface is provided with both
asynchronous or synchronous operation.
Current Model
SC-PMC/875 SCSI PMC Module from Concurrent Technologies.
Features used on the MDR system
The SC PMC/875 SCSI PMC Module has the following features:
• High performance: 32-bit DMA bus transfers at 110 MiB/s.
• SCSI-II
• Ultra Wide single-ended interface
• Asynchronous or synchronous operation
• Active termination and signal negation
• Utilizing NCR's 53C875 SCSI I/O
• Synchronous SCSI data rates up to 40MiB/sec
Supported tape drives
The MDR has been tested successfully with the following tape drives:
• Seagate Sidewinder 50 AIT-1/2
• Quantum DLT 7000.
SCSI Tape Format
The MDR system can be used with a SCSI PMC module connected to a Wide SCSI tape
drive. Using the MDR Shell (or API) functions, it is possible to copy data from the
storage device to the tape drive and vice versa.
A recording can be saved on one or several tapes according to the tape capacity and the
recording size.
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