[rescue] Sun Sparcstation 20 hard disks

Sandwich Maker adh at an.bradford.ma.us
Wed Aug 24 16:30:25 CDT 2011

" From: "J. Alexander Jacocks" <jjacocks at mac.com>
" On Wed, Aug 24, 2011 at 4:13 PM, Oliver Cromwell
" <vintagehacker at gmail.com> wrote:
" > My big concern is the current state of the hard drives, and they range in
" > size and age it appears.  I would like to fully replace all disks on these
" > systems with new disks but need some guidance.  It looks like they are
" SCA-2
" > disks with a single-connector interface and a SS can use disks up to 2GB in
" > size.  Is there a source for these disks new?
" Any SCA disk should be usable, no matter the size.  I'm not sure,
" offhand, what the maximum disk size that SunOS 4.1.x can address,

2G slices unless you get your hands on disksuite 1.0, so 16G/disk.

as noted, the ss2 is not sca but 50-pin narrow scsi.  i'm a little
surprised there aren't sca - 50-pin paddleboards that would fit on the
back of the drive.

also as noted, sun qualified their systems only with certain drives,
but if it's scsi it'll work - mod interface issues.  i ran my ss2 with
a pair of 4G hawks for many years; they were an excellent match for
4.1.4 and about equal to the sun0424/st1480n in power/heat.  worked up
an alternate alternate geometry so i could actually access every last

" but
" Solaris 2.5.1 can address 1tb disks, so I wouldn't worry too much
" about disks not being recognized.  At worst case, you may have to
" define fake disk geometry for SunOS 4.1.x, but that's not too hard.

there's even progs out there that will probe-scsi and [almost] make
one for you.  and there's a massive canonical format.dat which
probably already has the entry you need, on the net somewhere too.
Andrew Hay                                  the genius nature
internet rambler                            is to see what all have seen
adh at an.bradford.ma.us                       and think what none thought

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