Specifications

Escala Tower PL & S, E, T System Hardware
Chapter 5: Disks and Media 24/62
9es3s1c5.doc
Rev 5.9
02/12/03
2.4. PCI Dual Channel Ultra3 SCSI Adapter (MSCG048, MSCG051)
MSCG051 Discontinued: December 12, 2003
The PCI Dual Channel Ultra3 SCSI Adapter is a 64 bit adapter providing 2 SCSI channels (buses).
Each SCSI bus can either be internal (on systems that support internal SCSI device or backplane
attachments) or external and will support a data rate of up to 160 MBytes per second.
In order to achieve an Ultra3 SCSI bus data rate of up to 160 MBytes per second and also maintain a
reasonable drive distance, the adapter utilizes Low Voltage Differential (LVD) drivers and receivers.
To fully utilize this Ultra3 160 MBytes per second performance, all attaching devices or subsystems
should also be Ultra3 LVD devices. But, if Ultra2 and Ultra3 devices coexist on the same bus, each
device will operate at its rated speed. For lower speed single-ended (SE) devices, the SCSI bus will
switch to single-ended (SE) performance and interface at the lower SE bus data rate of the device.
Two industry-standard VHDCI 68 pin connectors are mounted on the adapter's end bracket, allowing
attachment of various LVD and SE external subsystems. A 0.3 meter converter cable, VHDCI to P,
Mini-68 pin to 68 pin, can be used with older external SE subsystems to allow connection to the
VHDCI connector on the PCI Dual Channel Ultra3 SCSI Adapter.
Note:
If any Single Ended (SE) SCSI subsystem is attached to an external port of this adapter, the
SCSI port will auto-throttle to a "Fast" interface speed running no faster than 20MB/s max. This auto-
throttle function is performed to ensure best signal quality between host adapter and attaching
subsystem. The second external port is unaffected unless a SE subsystem is also attached to it. If so, it
would also auto-throttle as described above.
Operational Requirements
•
Supported on the S120, T610, PL400T and PL600T.
•
One free PCI slot.
•
MSCG048: AIX 4.3.3 or later on S120, T610, PL400T and PL600T
•
MSCG051: AIX 5.1 or later for PL240T and PL420T
: Discontinued: December 12, 2003
.
2.5. PCI 4-Channel Ultra3 SCSI RAID Adapter (MSCG047, MSCG050)
MSCG050 Discontinued: December 12, 2003
The PCI 4-Channel Ultra3 SCSI RAID Adapter is a non-bootable high performance Ultra3 SCSI
RAID Adapter providing RAID 0,1, 5, 5E capability and can address up to sixty 16-bit SCSI physical
disk drives on four independent SCSI buses.
To increase the data writing performance, a 128 MByte fast-write cache is provided as a resident part
of this adapter. The 128 MByte fast-write cache is a resident feature of the PCI 4-Channel Ultra3 SCSI
RAID Adapter that utilizes non-volatile RAM. During the unlikely event of an PCI 4-Channel Ultra3
SCSI RAID Adapter failure, a replacement PCI 4-Channel Ultra3 SCSI RAID Adapter can be installed
and the fast-write cache can be removed from the failing adapter and installed in the new adapter
ensuring data integrity.