From Newsgroup: comp.sys.ibm.ps2.hardware

What a twisted web we weave...

Notice they included the SCSI controllers, Intelligent Memory Mover, and
the Remote Maintenance Processor into the total... You can get either
ONE or TWO system processors, though my SWAG is a uni-processor is a system/application processor, while a dual-processor has a system
processor and an application processor...

https://archive.org/details/bitsavers_dataproDatANCommunications1992Vol3752_1337173/mode/1up

page 7

"The Parallan servers are upwardly compatible and include the Parallan
Server 290, Models 10, 20, 50, and 60. The Model 10 has five processors, including one 33MHz 80486 system processor, two RISC SCSI processors,
the bit-sliced Intelligent Memory Mover, and the 80C186-based Remote Maintenance Processor (RMP). A 64-bit InterProcessor Bus, 8M bytes of
Error Checking and Correcting (ECC) main memory, 676M bytes of hard disk storage, one dual-channel SCSI intelligent disk controller, a Micro
Channel bus with eight slots, and Parallan’s Maximum Availability and Support Subsystem (MASS) are all a part of the Model 10.

The Model 20 has one additional processor beyond the Model 10, a 33MHz
Intel 80486 system processor. It differs from the Model 10 in that it
contains 16M bytes of ECC main memory, 1.3G bytes of hard disk storage,
a dual-channel SCSI controller, and a dual Micro Channel bus. The Model
50 has eight processors—two 33MHz Intel 80486 system processors, four
SCSI processors, the Intelligent Memory Mover, and the 80C186-based RMP.
It has the 64-bit IP-bus, 24M bytes of ECC main memory, 5.4G bytes of
hard disk storage, two dual-channel SCSI controllers, dual Micro Channel
buses with 12 slots, MASS, and one expansion enclosure. The Model 60 is identical to the Model 50 except that it has 32M bytes of main memory,
10.8G bytes of hard disk storage, and three expansion enclosures."
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From Newsgroup: comp.sys.ibm.ps2.hardware

https://books.google.com/books?id=4_Iuh9ebrG8C&pg=PA31&dq=%22server+290%22+parallan&hl=en&sa=X&ved=2ahUKEwjsmYDSgZSNAxUSmokEHWmhH1wQ6AF6BAgJEAM#v=onepage&q=%22server%20290%22%20parallan&f=true

Not exactly world-shattering...
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From Newsgroup: comp.sys.ibm.ps2.hardware

Not perfect, but better than nothing...

Parallan Server 290 Series I, Models 10, 20, 50, and 60

All models have a 64-bit InterProcessor Bus, 8 + 4 MCA slots,
80C186-based Remote Maintenance Processor (RMP), and Maximum
Availability and Support Subsystem (MASS).

Model 10 (1x) 486DX-33, 8MB ECC, (1x) 2ch SCSI, 676MB
Model 20 (2x) 486DX-33, 16MB ECC, (1x) 2ch SCSI, 1.3GB,
Model 50 (2x) 486DX-33, 24MB ECC, (2x) 2ch SCSI, 5.4GB, (1x) expansion enclosure.
Model 60 (2x) 486DX-33, 32MB ECC, (2x) 2ch SCSI, 10.8GB, (3x) expansion enclosures.


Parallan Server 290 Series II, Models 12, 25, 35, 45, 55, and 65
Incorporates all Series I features, plus the 486DX-50 CPU Cache
Subsystem, and the Parallel Disk Array...

Model 15 (1x) 486DX-33, 8MB ECC, (1x) 2ch SCSI, 426MB storage
Model 25 (1x) 486DX-50, 16MB ECC, (1x) 2ch SCSI, 852MB storage
Model 35 (1x) 486DX-33 / (1x) 486DX-50, 24MB ECC, (1x) 2ch SCSI, 1.7GB
Model 45 (1x) 486DX-33 / (1x) 486DX-50, 64MB ECC, (2x) 2ch SCSI, 3.4GB
Model 55 (2x) 486DX-50, 96MB ECC, (2x) 2ch SCSI, 9.6GB storage
Model 65 (2x) 486DX-50, 128MB ECC, (2x) 2ch SCSI, 19.2GB storage
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From Newsgroup: comp.sys.ibm.ps2.hardware

All Series II have the OS/2 Reserved Memory Manager, which extends
server memory beyond OS/2's 16MB limitation to support up to the full
128MB capacity of the Series II family.

Not sure, the Series I came out under OS/2 ver 1.1 / 1.3, and the OS/2
SMP probably supports >16MB already...

Louis Ohland wrote:

Not perfect, but better than nothing...

Parallan Server 290 Series I, Models 10, 20, 50, and 60

All models have a 64-bit InterProcessor Bus, 8 + 4 MCA slots,
80C186-based Remote Maintenance Processor (RMP), and Maximum
Availability and Support Subsystem (MASS).

Model 10 (1x) 486DX-33, 8MB ECC, (1x) 2ch SCSI, 676MB
Model 20 (2x) 486DX-33, 16MB ECC, (1x) 2ch SCSI, 1.3GB,
Model 50 (2x) 486DX-33, 24MB ECC, (2x) 2ch SCSI, 5.4GB, (1x) expansion enclosure.
Model 60 (2x) 486DX-33, 32MB ECC, (2x) 2ch SCSI, 10.8GB, (3x) expansion enclosures.

Parallan Server 290 Series II, Models 12, 25, 35, 45, 55, and 65
  Incorporates all Series I features, plus the 486DX-50 CPU Cache Subsystem, and the Parallel Disk Array...

Model 15 (1x) 486DX-33, 8MB ECC, (1x) 2ch SCSI, 426MB storage
Model 25 (1x) 486DX-50, 16MB ECC, (1x) 2ch SCSI, 852MB storage
Model 35 (1x) 486DX-33 / (1x) 486DX-50, 24MB ECC, (1x) 2ch SCSI, 1.7GB
Model 45 (1x) 486DX-33 / (1x) 486DX-50, 64MB ECC, (2x) 2ch SCSI, 3.4GB
Model 55 (2x) 486DX-50, 96MB ECC, (2x) 2ch SCSI, 9.6GB storage
Model 65 (2x) 486DX-50, 128MB ECC, (2x) 2ch SCSI, 19.2GB storage

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