SSD for Vax - HECnet

11 Oct 2013

On 2013-10-10 18:39, Hans Vlems wrote:
DEC had solid state disks, all das iirc

DEC had solid state disks already in the 70s. It was called the ML-11. Massbus interface
even...

	Johnny

*Van: *Johnny Billquist
*Verzonden: *donderdag 10 oktober 2013 11:29
*Aan: *hecnet at Update.UU.SE
*Beantwoorden: *hecnet at Update.UU.SE
*Cc: *Mark Wickens
*Onderwerp: *Re: [HECnet] SSD for Vax

On 2013-10-10 09:46, Mark Wickens wrote:
...
  On 10/10/2013 08:17, Daniel Soderstrom wrote:
  Has anyone tries this? Running my Vaxstation
non-stop reminds me how
 much noise these old drives make.

 Has anyone tried SSD drives? Must be good for the PSU it terms of heat
 and current draw.

 Daniel

 Sent from my iPhone  There has been very little success with IDE to SCSI converters
on this
 age of machine. 
Hmm. bad IDE to SCSI converters?

...
  Remember also that even 4000/90 vintage VAXstations
generally have an
 upper limit of 18GB. 
Uh? That got to be a limit in VMS in that case. I can't see how the
hardware would have that limit.

...
  I don't recall anyone even getting an IDE drive to
work, let alone an SSD.

IDE and SSD are two completely unrelated things as such. However, if the
SSD have an IDE interface, then you obviously need the IDE to SCSI
converter.

...
  Would love to be proved wrong however! I'm
surprised someone hasn't
 written a software based SCSI drive emulator the same way that you get
 floppy emulators. 
Probably mostly because of speed issues. You have some very tight timing
requirements, and a SCSI interface runs way faster than a floppy.

...
  Consider running the machine diskless, booted off the
network with
 off-node disks. 
That definitely also works.

Johnny

--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol

-- 
Johnny Billquist                                   || "I'm on a bus
                                                                  ||   on a psychedelic
trip
email: bqt at softjar.se                         ||   Reading murder books
pdp is alive!                                         ||   tryin' to stay hip" -
B. Idol