Does anyone know about the following information? I can't find the info in the service manual.
Internal drive bay interface (Fast SCSI, Fast Wide SCSI or SCA?)
Internal drive bay height restriction (low profile, 1 inch?)
External SCSI port interface (Fast SCSI, Fast Wide SCSI or SCA?)
Another question: Why does the service manual indicated that the maximum drive capacity is 2.1 GB?
Thanks in advance!
http://sunsolve.sun.com/handbook_pub/Systems/SS20/SS20.html
general page
service manual
ftp://192.18.109.11/801-6189-12/801-6189-12.pdf
I hate to be nasty, but did you even try to look for this info?
the SS20 takes ONLY 1" sca (80 pin) drives... at the time, 2 gig drives was all that Sun recommended/supported... I wouldn't try anything bigger than 9's, the SS20 is very bad on cooling, depending on cpus...
I imagine it is only Fast SCSI...
does this help?
don't want to piss you off, but most of this was found in the service manual.. but I have been playing with Sun boxes for 10+ years and have a short fuse when people ask question before looking.......
haroldkarl
Thanks for the info. By the way, you almost pissed me off. It seems you are only looking at the service manual. Actually, I already looked at the sites you have given before I went into this forum. I was not satisfied with the information on these sites. The service manual did not indicate the height limitation (my real target). I searched through the net for the height limitation before going to this forum. Through my research, I came by some sites (mostly resellers of refurbished units) that indicate interfaces of Fast SCSI and Fast Wide SCSI. I logged on to this forum to verify the information that I came across.
Anyway, thanks again.
yeah, they never say anything about the height of the drives.... you have to search the drive id (usually seagate!)...
which cpu(s) do you have in it? the SM-81s will be the fastest (and hottest!) ones... no matter what they say about the Ross processors....
good luck with the SS20... they are cute, slow, and rock-steady!!!
haroldkarl
Hello,
I can't find the info in the service manual.
Internal drive bay interface (Fast SCSI, Fast Wide SCSI or SCA?)
SCA is "Single Connector Attachment" with 80-pin (data, signal and power combined) describes only the connector, not the SCSI standard.
Fast (Narrow) SCSI (uses 50-pin connector), (Fast) Wide SCSI (uses 68-pin connector) for signal and data are SCSI standards. Power is on a separate 4-pin connector.
Internal drive bay height restriction (low profile, 1 inch?)
Apparent from the chassis only low-profile disks fit. The full-height (1") disks have never been qualified for these systems as internal disks.
As Harold remarked you might use a 1" high disk in the lower bay, but won't like to do so due to the dissipated heat. The SPARCstation 20 had a tiny fan (between the disks and the CD drive added to cool the (qualified) disks.
There was no need to describe the exact form factor of the disks, the Sun part-no. is suficient. To install an internal disk a special frame is required.
External SCSI port interface (Fast SCSI, Fast Wide SCSI or SCA?)
50-pin HD connector therefore only Narrow SCSI . Review page 202+203 of the Service Manual for the SCSI standard.
Due to the age most of these systems went (now) straight to the junk yard.
Michael
