In my alphaserver 1200 I have a three channel SCSI RAID controller mylex DAC960. But I can not determine what EXACTLY it is. There are a lot of stickers on it but most important are:
1. DEC part N: KZPSC-UX
2. DEC part N: KZPAC-XF
3. FCC ID: D5NDAC960PDU-3
AFAIK KZPAK is ultra/wide (which means 20MHz 16bit) and KZPSC is fast/wide (10MHz 16bit). The question is what exaclty interfaces supports this one (is it ultra or fast)? How can I determine? Now I'm running the ra200rcu utility and in the "controller setup" menu -> "SCSI Xfr Paramethers" -> I can choose the transfer rate between 5 and 10 MHz - maybe is the KZPSC? But there is also Max. (maybe 20MHz? or again 10MHz) and Async. (what means that?). The RCU utility itself says that is KZPAC... but I'm not sure because of the stickers and the possible speed selection.
It is so bothering me this question because I have two failed drivers and I want to replace them and I found two 80pin 18G drives:
ST-318203LW Ultra2 SCSI Wide (Cheetah 18LP, LVD)
Can they work with mine DAC960? In which case - if it is KZPAC, KZPSC or not a chance at all? If I connect them to test - can this damage the controller or the drives?
I have read in the wikipedia about the SCSI, and there was clearly stated that the SCSI is backward compatible (if the connector is the same). But I brought two older drives (SCSI-3) and they are working fine now (I find the SCSI standarts/docs confusing and preffered not to risk with LVD).
But the transfer from the drives (IMHO) is low - 6-10mb/s. I tested with hdparm (under Alpha Core) - no difference between RAID-1 and JBOD (I expected RAID-1 to be a little faster in reading than JBOD). All drives are 7200rpm, SCSI-2 are the drives in the RAID-1, and SCSI-3 - in the JBOD.
I expected to be somewhere around 15mb/s at least for the RAID. Now I'm reading the OpenVMS docs about MONITOR (DISK). Can it provide the transfer rate in mb/s (if I put the disk under load - some file transfer)? Or another way?
I'm just curious about this...
RE: Question about scsi raid controller (mylex dac960)
That question I can answer. Your controller is a KZPAC-XF. The part number KZPSC-UX is the cache memory module. The cache memory module may have a backup battery which is required if you are going to do asyncronous writes. The battery is probably long since expired.
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!