[Info-vax] analyze/disk errors

[Stephen Hoffman]

On 2013-12-10 23:26:35 +0000, David Froble said:

> Yes, the AlphaServer 800 that I have has the disk cage for 4 drives, 
> and I thought it was rather nice.  But the DS20 I have has an older 
> storage works cage and the earlier disks in caddys.

FWIW, a mini-history: AlphaServer DS20 and DS20E have the so-called 
Universal disks and shelves in either the older 1.4" spacing or newer 
1" spacing heights, and all of these Universal sleds are newer than the 
StorageWorks Building Blocks (SBBs) mentioned earlier.  The connector 
used on these metal-finned Universal disks isn't the same 80-pin used 
on the US$30 Seagate 146 GB disks mentioned upthread, either.   These 
were common on DEC- and Compaq-legacy systems.

>From the HP side, the pull-ring disks where common — donno the official 
name of those, but they were used on various PA RISC boxes, and on the 
rx1600, rx1620, rx2600 and rx2620 series Integrity Itanium systems and 
various of the HP-legacy storage shelves.

The HP-legacy pull-ring disks and the DEC/Compaq-legacy Universal disks 
were eventually replaced by the StorageWorks Small Form Factor 2.5" 
(SFF) disks commonly used on most (all?) of the current-generation 
Itanium servers including the rx2660 and other recent boxes, and on 
various recent storage systems and shelves.

More than a few storage configurations are mongrels, too; various 
mixtures of generations and disks.  Replacement seldom seems to be 
complete.


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