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OpenVMS Hobbyist Program | Alpha Systems Forums | Alpha Hardware Forum
Author KZPSC-XB/Mylex DAC960LB - junk it?
saq
Member

Posts: 53
Joined: 24.05.08
Posted on May 19 2012 18:38
I'm going through the box o' Alpha/Sun/SGI/etc. parts, and came across an old KZPSC-XB StorageWorks RAID Array card (rebadged Mylex DAC960Lsmiley. Looks to be only Fast-10/Wide (53C720 chips), and the memory seems to recall something about these being not-so-good, so I'm considering tossing it.

Is my recollection correct on bad Mylexes, or did DEC fix the Mylex bugs? Would my OVMS Alpha be better off with this than its current ISP1040-based storage?
Edited by saq on May 20 2012 15:48
Author RE: KZPSC-XB/Mylex DAC960LB - junk it?
malmberg
Moderator

Posts: 461
Joined: 15.04.08
Posted on May 21 2012 03:46
The KZPSC series cards worked well with in their limitations.

If you do not want to use the card, I think you may find it still has value on the used market.
Author RE: KZPSC-XB/Mylex DAC960LB - junk it?
somersdave
Member

Posts: 63
Location: bristol,UK
Joined: 23.03.07
Posted on May 21 2012 10:51
From my limited hardware/system management experience, I think that it's probably better not to 'play around' with a system once it's working ok, if possible.

Sorry if this is a bit garbled but I made a few notes when I tried to install a SCSI card in my Alpha 4000 a few weeks ago.....

The problems started after physically installing a KZPSA SCSI card and connecting it to the 2nd shelf in the ALPHA 4000, running OpenVMS 8.3

It had been working nicely with the 5 member RAID 5 disk setup in the lower shelf - so
it was perhaps a bit silly to start modifying the hardware setup. Whilst 'playing' with the SCSI card I attempted to upgrade the BIOS firmware, using the LFU as it appeared that the SCSI KZPSA firmware was not present.

Initially I had a failure to power up and various errors which I haven't noted well but I decided that
there was a problem with the 512 MBytes of memory:
the first message was "Power up tests have detected a problem with your system! Reset the system
and observe the OCP display and/or type "show config" and "show power"

-from SRM console I ran "test mem0" and got a deluge! of messages, including
"CPU detected uncorrectable ECC error" and
"CPU 00 unexpected machine check through vector 0000670"

I replaced the 2 * B3030-EA 256MByte mem cards (asynchronous) with 4 * B3020-CH 64 Mbyte (synchronous)
cards. Afterwards the machine booted and was running normally (AFAsIKnow). Although the machine now has less memory, the synchronous RAM is described online, as faster. I also wondered about the effect of having 4 memory cards instead of 2 with respect to access speed.

Later (after the RAM change) I booted normally and the system seemed ok but after being distracted for a while I came back to my PC and got no response at the SSH Alpha terminal sessions.

I went to the Alpha Console and got:
halt code 6
pcb 6a3d0
!!! console entry context is not valid - Reset the system !!!
Brk 0 at 0006917c
0006917 ! BPT

I tried to power up and boot several times and got more messages, like:
UNEX MCHK on CPU 0
EXC_ADR4239

and Test CPU0
"your system has halted due to an irrecoverable error, record the error
halt code and contact your Digital Service Rep."
Type INFO 5 and INFO 8

also
OpenVMNS Alpha V8.3 - BUGCHECK
Bugcheck code = 000000215 : MachineCheck while in Kernel Mode

and another halt code 7 event

Anyway after several boots, the system would run for increasing durations before hanging (no messages) and having to press the reset button, however after the last reboot, I shut it down normally after about 8 hours.

I would be interested to know
if the system is capable of some self repair/modification (as it now boots and runs where it wouldn't cooperate at all)

Perhaps I should have done more than just replace the RAM though I have run Autogen (maybe a 'shot in the dark' ) when the system seemed stable.

The ALPHASERVER 4000/4100 Service Manual seems a pretty good guide to maintenance:
halt code 6 - "Double error Halt"
halt code 7 - ""Machine Checks While in PAL"

..... I've booted the machine a few times since the initial problems and although it occasionally 'hangs' I can live with that as I don't intend to leave it running continuously. My main concern is to not corrupt the disks. I assume that 'resetting' the system, to reboot, leaves the disks 'spinning'.


ps : if anyone has any 4000/4100 bits they don't want?
I have some alpha 2100 specific parts: PSUs, boards, cabling, front cover - from a machine wouldn't power up even before I got it - I'm happy to give away but would prefer to swap.
Edited by somersdave on June 18 2012 09:55
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LouF91
April 05 2018
ah maybe they love that!

malmberg
March 24 2018
Probably. More people hang out on the comp.os.vms newsgroup.

vaxpert
March 23 2018
I have a PE42A and other Alpha system stuff for sale. I'm in So California. Any interest out there?

goodbyespy
February 27 2018
To Prohorenko. Please, visit group OpenVMS in the ok.ru

peteherrera
February 24 2018
How much does it cost to buy a complete OpenVMS hardcopy documentation set of the latest version

prohorenko
February 17 2018
Please help to obtain the license on OpenVMS

malmberg
December 12 2017
HPE only makes the most current version of OpenVMS Alpha / IA64 /VAX available to hobbyists. When I had access to the Alliance 1 program it was the same. No public downloads are allowed by HPE.

nmbonao
December 08 2017
Is anybody knows OpenVMS 8.2 version downloadable version? or CD copy? Thank you very much

aarommes
December 02 2017
Bitcoin and Blockchain enthusiasts ( plus distributed computing ) please connec / reply: http://www.openvmshobbyis
t.com/forum/viewthread.ph
p?forum_id=130&thread_id=
2991


malmberg
September 10 2017
https://sourceforge.net/p
/vms-ports/wiki/VMSInstal
lation/ For the most part just use VMS 6.1 media instead of 7.3. But why run the older release?


DoeveR
August 07 2017
Where can I find the write up on running VMS 6.1 using the simh emulator?

Bart
March 20 2017
Happy to have found my password again!

pintero
March 16 2017
peteherrera. Agreed.

peteherrera
March 04 2017
It would be nice to be able to buy the lastest hardcopy full OpenVMS docset at a very reduced price through the Hobbyist program. smiley

malmberg
February 05 2017
Decus > Connect > Encompass<Country>

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