F/W Streaming RAID
- IBM SCSI-2 F/W Streaming-RAID /A 'Cheetah'
Streaming RAID Adapter/A "Cheetah"
Function of NVSRAM
HD LED Does Not Work
HD LED Hack
Cyrix/Non-SOD Type 1 Incompatibility?
Accessing the RAID Configuration
FWSR Bios Flash Disk
Cheetah in a 85 / 95 /95A
Cheetah in a Server 500
and RAID adapter configurations (takes you to 8641 page)
Getting CD Rom to WORK On Server
Linux on FWSR?
LVD Drives on Cheetah?
Logical Drive Size Limits under NT
Specifications For FWSR
Streaming RAID Adapter/A "Cheetah"
FRU 06H3059 Sidecard FRU 06H3060
IBM SCSI-2 F/W Streaming-RAID Adapter/A
|J1 Channel 1 68 pin edgecard
J2 Channel 2 68 pin edgecard
J3 Not connected. Or used.
J4 DASD Status Connector
J5 DASD Status Connector
J6 Possible serial port. Unused.
|J9 Channel 2 external port.
Y1 50 MHz Oscillator
Y2 40MHz Oscillator
F1 Channel 2 PTC resistor
F2 Channel 1 PTC resistor
The Cheetah has two channels. Each channel is controlled
by an NCR53C720. The header J1 is Channel 1. It usually is attached to
an internal array, but with the addition of a side card, it can controll
an external array. The second channel uses J2 OR the external port, J9.
This is still one channel, so one can use either the internal port, OR
the external port. Do NOT try to use both J2 and J9 at once.
NVSRAM is a Benchmarq 28 pin 8Kx8 bq4010YMA-200, Spec
Another equivalent is a Dallas DS1225Y-200, spec
Each NV SRAM has a self–contained lithium energy source and
control circuitry which constantly monitors VCC for
an out–of–tolerance condition. When such a condition occurs, the lithium
energy source is automatically switched on and write protection is unconditionally
enabled to prevent data corruption.
The mini C68 for the Channel edgecard connectors is the
part# 15-92-3068, called a half pitch Centronics, or a VESA Media Connector.
Suprise! AMP makes a similar part (mini-C68) AMP Part 1-557089-2
Any cable with a .025 pitch, 28 to 30 AWG will work with either connector.
A Better Cable Hack?
Allen Brandt wrote:
> A small, shotty attempt to get something uploaded concerning the
My Take on it:
I am starting to have neurons fire. Actually, Allen provided
the push. Al went and slit the conductors for better flexibility (in pairs).
Could you slit the flat cable up towards the controller
and get the very flexible cable bundle of the IBM original? The black sheathing
is available from Jameco for about $1 a foot. Well worth it, IMHO. (Start
the slit with an X-Acto and use the reverse of the blade to finish parting
The sheathing is Techflex Cable Sleave, looks to be the
3/8" size. Sold in a 25' spool. Part #162157,
Product # CCPT2X per spool $14.95 Techflex is HERE
What kind of signal degredation might occur? Each signal pair hopefully
cancels it's noise out.
If the Brandt manuever can be done from the top drive
connector to the adapter, it might be a close match to the real thing
HD LED Doesn't
From Peter (or Tim?)
The fixed disk light is non-functional with both the Server
95 A "Passplay" and Streaming-RAID "Cheetah" MCA RAID adapter. I
suspect this is also the case with other OEM'ed Mylex RAID adapters.
LED For Cheetah
BUT if you take an LED off of J6, pin 1 and 2, it will
light when the drives are accessed. Just run a lead up to between the LED
blocks in the display panel. Watch the polarity. If the LED doesn't light,
switch the header around. You do not need a resistor for this.
I tried this, but the LED didn't have enough umph. Pretty
dim through the LED Panel. Maybe some sort of a drive circuit?
Just had a thought- twist the existing HD LED out of the Op
Panel and put the LED that is connected to J6 in there....
just thought that I'd better warn you.
After checking out the Cyrix 5x86 at 4x clocking (in Type-1 non-SOD w/cache)
my PassPlay RAID adapter seems to have been "duffed up". I only get a part
of the BIOS v1.05 initialisation/installation message and the machine hangs
(with *any* CPU) at CP:96. Looks as though the Flash ROM has been partially
overwritten (just a guess).
for more details
the RAID Configuration
Both the FWR (Passplay) and FWSR (Cheetah) are only configurable
through the RAID Utilities disk. You CANNOT see the SCSI Disks under "Set
and View SCSI Devices" like normal SCSI drives. Boot with FWSR
Option Disk, #1 ver. 2.31 in order to view or configure the array.
Both adapters use the same Utilities disk of the later
IBM F/W Streaming RAID Adapter /A (Codename "Cheetah" - with external port)
since both are based on Intel i960 / Mylex / NCR technology. There was
a single-disk version 2.22, which should be unique for all /A-Raid adapters
of that kind, but not the PCI-versions. The RAIDADM
(manager) should work on both /A-adapters.
Utility version 2.31 consists out of two disks:
Option Disk, #1 ver. 2.31
Option Disk, #2 ver. 2.31
for FWSR Option Disks
Not sure if this fits-
Supplemental Diskette Version 2.0 And the Readme.txt
RAIDSEND is a utility that provides an OS/2 ONLY command-line interface
for performing various tasks on a IBM F/W Streaming RAID Adapter/A, the
IBM SCSI-2 F/W PCI-Bus RAID Adapter, and the Mylex PL adapter for the IBM
PC Server 704.
RAID Flash Bios for "Cheetah"FRU 06H3059
The Passplay and the Cheetah differ in the microcode,
which *may not* be interchanged. The Passplay (FWR) adapter uses
a microcode-level 1.6x through 1.99, the Cheetah (FWSR) uses 2.xx levels.
If you flash the one adapter with the code from the other you end up in
Flash BIOS 2.21 For RAID controller WITH external port!
Flash BIOS Readme
Cheetah in a 95
The RAID bay for the 85/95/95A does not have a place for the
status cable to attatch. The RAID bay has a 68 pin edgecard at the back
where the molex style SCSI connector attaches to. The 95 RAID bays automatically
terminate the SCSI drives inside. Do NOT enable termination on the individual
I installed a CD Rom in Bay 7. I used a 68 to 50 pin adapter
from the RAID cable connector. I have installed both NT Workstation 4 and
OS/2 on it. Both were able to detect and use the CD Rom during setup. FWIW,
I had only one bay with three drives in it.
Cheetah in a Server
Setting the CD
Rom ID in a Server 500
I think I saw a patch somewhere to "fix"
a CD on the FWSR under NT.
From Rich Nagle
Following repeated failures of NT 4 Server
setup to recognize the CD Rom connected to the passthrough connector on
the top backplane, I noticed that the CD Rom was showing up as one SCSI
ID# higher than it was when I checked it under the RAID Utility View Configuration.
After checking the SCSI ID jumper on the
backplane (set to LO for IDs 0 thru 5 on the backplane), a sudden flash
of inspiration occured- I set the CD Rom to ID 5, went back under the RAID
Utilities, and the CD Rom was now ID6. I then deleted, then recreated the
array. Now when I ran NT Setup the CD Rom was recognized automatically.
Linux on FWSR
>> Is anyone running linux on one of these machines?
Not on machines with the IBM Raid controller with
the old 2.43 firmware. No Linux driver available
The IBM Fast/Wide Streaming Raid Adapter PCI as
used in the Server 320/520 MCA-PCI versions is derived from the Mylex DAC960PL
- it only has 128K Flash ROM (one 28F010 chip) but a second open socket.
Firmware 3.x requires 256K Flash. I'd tried to plug in a second 28F010
... but I think the old software contained in that chip confused the adapter
a bit ... it behaved a little "strange" (long boot time etc.)
What I do not have is an Eprommer that is capable
to write the Flash-ROMs of the 28Fxxxx series or I could a) write a spare
2.4x Flash (to keep for the "worst case") and b) clear the 28F010 ROMs
I pulled from some old boards. Else I would stuff in a blank ROM in the
second socket, have the old 2.xx in the first and run a firmware update
3.x from the DAC960PL on that adapter.
The machines with the older RAID-adapters ("Passplay"
and "Cheetah") based on MCA technology are out of the discussion anyway.
They are based on the DAC960M technology basically but an older draft of
that concept. They use some of the chips of the -M and early -Px adapters
(PL / PD) and they are developed by Mylex - but the firmware 3.x is PCI-specific,
not MCA. So you can practically forget about using them under Linux since
the driver is *particularly* written for the 3.x firmware level.
LVD on Cheetah
>What kind of drives does the RAID take? Is F/W
DIFFERENTIAL SCSI the right kind? Or are LVD (low voltage differential)
different and it needs them instead? I've never dealt with RAID before.
Remember the "Cheetah"-Adapter's
"Real Trade Name" ? IBM Fast/Wide Streaming Raid Adapter /A.
It it an ordinary F/W indended for
single-ended SCSI devices. It does however take U/W LVD drives, because
these are downward-compatible to single-ended, which the old "high-voltage
differential" are *not*.
If you get - for
example - a set of U/W "Low Voltage Differential" (LVD) IBM DDRS 4.5 or
9.1GB drives then they will nicely run with the Cheetah. I have some of
them in "Starship" - my Server 520 attached to the Fast/Wide RAID Adapter
PCI. No problem. You can even mix them
with "ordinary" F/W or U/W drives. Same
for the Cheetah and even the older Passplay.
Limits under NT
Tony speaks with conviction
when he says:
I've got Cheetah running a rack
of 9G drives in a MCA Server 320. One issue seems to be it won't
configure a logical drive larger than 32G (you can have several of these
though). Not exactly crippling for modest use, but a limitation none
the less. I haven't tried to see of NT's volume spanning tricks could
be layered atop some of these 32G drives - might be one way around that
|SCSI bus path / speed
||16 bit / 20 MB/sec
|I/O bus path / speed
||32 bit / 40 MB/sec streaming
(80 MB/sec on PC Server 720)
||Streaming data xfer Address and data parity
||RAID 0, 1, Hybrid 1, 5
4 ind (A, B, C, D) / 8 logical arrays
|Tagged Command Queuing
||i960CA at 25 MHz
||Type 3 (full length)
||Two (one internal; one internal or external)
||Two internal - 16 bit wide
(sidecard not included on Server 500)
One external - 16 bit wide
*Can only use two connectors at once
||14 per adapter (7 per max per channel)
||4 MB (with parity) 60 ns soldered on.
|Cache write policy
||Write-through or write-back
IBM SCSI-2 Fast/Wide Streaming-RAID Adapter/A
Set the interrupt level for the adapter.
<"Level E">, A,
BIOS Base Address
BIOS base address. Each adapter must have a unique address
C2000-0C3FFF, C4000-0C5FFF, C6000-0C7FFF, C8000-0C9FFF, CA000-0CBFFF, CC000-0CDFFF,
CE000-0CFFFF, D0000-0D1FFF, D2000-0D3FFF, D4000-0D5FFF, D6000-0D7FFF, D8000-0D9FFF,
DA000-0DBFFF, DC000-0DDFFF, DE000-0DFFFF
I/O address. Each adapter must have a unique address range.
<"1C00-1C1F">, 3C00-3C1F, 5C00-5C1F, 7C00-7C1F,
9C00-9C1F, BC00-BC1F, DC00-DC1F, FC00-FC1F
DMA Arbitration Level
DMA channel the adapter will use to transfer data.
<"Level 8">, 9, A, B,
C, D, E, 1, 3, 5, 6, 7
How many towers of seven drives will be presented to the
user. Any messages regarding drive status are always presented in terms
of bays in the tower. When each channel of the Streaming-RAID Adapter/A
is connected to a different tower select the '2 Towers' Configuration and
when both channels are connected to one single tower select the '1 Tower'
<"2 Towers">, 1 Tower
Data Parity Exception Handling Support
Enable or disable the Micro Channel data parity generation
NOTE: System must support this option.
< "Enabled ">, Disabled
Micro Channel Streaming
Eenable or disable the Microchannel streaming. NOTE:
If the system does not support this then this option will NOT be available.
<"Enabled ">, Disabled
INT 13 Support
This provides limited support for BIOS INT 13 function
calls and is required if boot devices are connected to Streaming-RAID Adapter/A.
NOTE: If the system does not support this
(eg. not a T1 upgrade-66 or any T4 complex) then this option will NOT be
< "Disabled">, Enabled