[Info-vax] SCSI issues on Alpha

[will.lee at connecmax.com]

On Tuesday, December 24, 2013 at 12:09:47 AM UTC+8, Scott Dorsey wrote:
> I've got a user who is a great fan of his  Alpha Personal Workstation 433a,
> and I'd like to consolidate the disks on it and replace them with a newer
> mirrored pair of disks.
> 
> Currently on the SCSI chain he has the internal RZ1CC-BA, and externally
> he's got one Seagate ST1510N drive and two IBM DNES-318350W drive.  So the
> mix of wide and narrow is a little weird.
> 
> Now, the only newer SCSI drives I have are Seagate ST3146807LC, since new
> scsi drives are not a common thing.  I can put them either on an adaptor
> to an 80-pin Honda connector or an adaptor to a 50-pin Centronics-style
> connector, but in either case the buss becomes extremely flakey... when 
> I am at the monitor rom and do a "sh dev d" everything disappears or 
> large numbers of duplicate drives appear.
> 
> So... my first question is why is the "sh dev d" on this system so different
> than on the Decstation machines?  It seems like it is caching something; it
> does not do a buss reset every time I run the command.  What do I need to do
> in order to get it to actually force a buss interrogation?
> 
> And the second question is... why is this happening?  Is there something 
> about the ST3146807LC that is a problem?  The low voltage mode?  The 
> differential mode?
> 
> I tried moving the whole external chain over to an Ultrasparc machine and 
> everything works just fine there, I can't make the buss do anything odd.
> So I am thinking it's something specific to the way the Alpha implements
> it.
> 
> Is there some other large drive I should be trying here?  Am I missing
> something important?
> --scott
> -- 
> "C'est un Nagra. C'est suisse, et tres, tres precis."

Dear Friend,
 
We produce all kinds of SCSI cable with good performance. Certificates of SGS have achieved. We have own logistics company to save your cost . And OEM is supported.
 
All the Wire is Bare Copper. Here are the SCSI cables we produce, if the items you interested, pls inquiry us.
 SCSI Lead Ultra 68 male to Ultra 68 male (VHDCI) SCSI cable
 SCSI Cable HD68M to HD68M  cable
 SCSI-5 (VHDCI) 0.8mm to SCSI-3 (HPDB68) 68-Pin Male/Male Cable
 SCSI Lead 50 Centronic male to 50 Centronic Male SCSI cable
 SCSI Lead Half Pitch 50 male to 50 Centronic male cable
 SCSI HPDB50 Male to Cen50 Male External Drive Cable
 SCSI HPDB50 Male to VHDCI68 Male Cable
 
Waiting for your inquiry.
 
Best regards!