It would be interesting what speeds ms per I/O.
Best I have ever seen and an XP array was about 5ms per I/O, but that is from memory.
I am sure I have stats on an N-class to an XP array to compare.

-Craig
 

    On Monday, February 20, 2023 at 08:54:10 AM PST, Tracy Johnson <[log in to unmask]> wrote:  
 
 I filed that one in my Thunderbird email client's HP3000 folder and gave 
it a red tag in case I need to find it.

Since I run a 957, I might need it.

P.S.  I also found my spare for my Jamaica mirrored drive that became 
disabled.  I had those 4GB enclosures modified with 32GB drives.  But 
when you mirror them, the pair has to be the same make and model, not 
just 32GB.  So that ZuluSCSI looks appealing if you get it to work.  If 
so, I may have the fastest seek rate on the planet for my 957 Empire 
machine.  (99 bucks is so attractive.)


On 2/20/23 11:44, Robert Liesenfeld wrote:
> Upon further reflection, it seems that I posted about the DS1287
> replacement to another list besides this one, and naturally I can’t find
> the post now.
>
> Still, all it covered was using CLKUTIL from the ISL prompt to set the
> clock.  After that, the system should boot, and SETCLOCK from within MPE
> should be able to change the date and time without issue.
>
> I found this HP support document about CLKUTIL.
> https://support.hpe.com/hpesc/public/docDisplay?docId=c01296713&docLocale=en_US
>
> On Sun, Feb 19, 2023 at 23:12 Robert Liesenfeld<[log in to unmask]>  wrote:
>
>> First off, thanks for the reports on the ZuluSCSI!  It’s great to see so
>> many options in the marketplace for replacing dwindling stocks of spinning
>> disks.
>>
>> For the DS1287, I can report that the replacement board made by
>> Glitchworks and sold on Tindie works well.  It was easy to install on my
>> 927LX main board, but of course does require desoldering the old chip and
>> soldering in the Glitchworks product.  Once that’s done you just have to
>> clear the chip contents with an ISL utility and set the date and time.  I
>> posted about this a while back when I was going through this process, just
>> search for DS1287 in the archives.
>>
>> Here’s a link to the Glitchworks board
>>
>> https://www.tindie.com/products/glitchwrks/gw-12887-1-ds12887-rtc-replacement-module/
>>
>> Hope this helps.
>>
>> On Sun, Feb 19, 2023 at 22:42 Frank McConnell<[log in to unmask]>  wrote:
>>
>>> On Feb 19, 2023, at 00:22, Frank McConnell wrote:
>>>> In the middle, I haven’t got the ZuluSCSI RP2040 to work yet, with it
>>> in I get boot failures of the form:
>>>
>>> Further on this, have got the ZuluSCSI RP2040 to present an HD5.img as a
>>> SCSI disc to MAPPER which is displaying it.  Said HD5.img is 2+GB copied
>>> from /dev/zero but is at this point only there so I can see if something
>>> shows up on the SCSI bus from the ZuluSCSI RP2040.
>>>
>>> Both ZuluSCSI boards are on the bus.  52.0.0 is a (real)
>>> HPC1503(X)/HPC1520B DDS tape with Firm 1009, 52.5.0 is a ZULUSCSI HARDDRIVE
>>> with Firm 2.0 (this is the RP2040), and 52.6.0 is a ZULUSCSCI HARDDRIVE
>>> with Firm 1.1 (this is the v1.1 whose HD6.img is a copy from the 1GB C2247
>>> drive and it is on the end of the SCSI bus cable and configured by TERM
>>> switch to terminate the SCSI bus).  ISL, ODE, MAPPER are loaded from the
>>> ZuluSCSI v1.1.
>>>
>>> Have also gone looking for the DS1287 and oooh that will be a project.
>>>
>>> -Frank McConnell
>>>
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>>>
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-- 
Tracy Johnson
BT







NNNN


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