15 Sep
1999
15 Sep
'99
3:01 p.m.
Good for there time but very old and small.
< RD50 5mb Seagate ST506
< RD51 10mb Seagate ST412
Excellent drive for a 30mb full height, near indestructable.
< RD52 35mb Quantum Q540
Tended to get cranky when over 4-5 years old, most all are.
< RD53 71mb Micropolis 1325
Good find, 159mb and reliable.
< RD54 159mb Maxtor XT-2190
Excellent 20mb drive.
< RD31 21mb Seagate ST225
Peice of garbage, runs hot and has spindle problems.
< RD32 42mb Seagate ST251
Experience, I have them all and have used them all.
Allison
15 Sep
15 Sep
3:19 p.m.
I have an ST-251 and an ST-251-1. The -1 had a few more badblocks, but no
heat damage on the PBC where the normal 251 had it. Both are still
working but they seem slower than the RD54 to me...
jake
On Wed, 15 Sep 1999, Allison J Parent wrote:
[snip]
Peice of garbage, runs hot and has spindle problems.
< RD32 42mb Seagate ST251
Experience, I have them all and have used them all.
16 Sep
16 Sep
12:39 a.m.
I have an ST-251 and an ST-251-1. The -1 had a few more badblocks, but no
heat damage on the PBC where the normal 251 had it. Both are still
working but they seem slower than the RD54 to me...
The -1 is no better. Considering they are a stepper they would be slower
than the RD52,53,54s that have both more heads and voice coil positioner.
About all the st251 has in it's favor is it's half height.
Allison
4:05 a.m.
New subject: Disk Drives, was Re: Find of the day
allisonp(a)world.std.com wrote:
I don't have any idea about the drives used in a DEC environment, but in the
IBM PC world, the best program I have found to date is Spinrite for doing a
check of the HD media. Having used Nortons NDD, that joke of a program
called Scandisk, and a couple of others, Spinrite is the only one that has
never caused more problems than it solved. I just ran Scandisk on a Win98
drive that was beginning to fail resulting in the drive being unreadable.
Ah, the fun of working with computers!
I have an ST-251 and an ST-251-1. The -1 had a few more badblocks, but no
heat damage on the PBC where the normal 251 had it. Both are still
working but they seem slower than the RD54 to me...
The -1 is no better. Considering they are a stepper they would be slower
than the RD52,53,54s that have both more heads and voice coil positioner. 
15 Sep
15 Sep
12:53 p.m.
New subject: Disk Drives, was Re: Find of the day
Date: Thu, 16 Sep 1999 09:05:54 -0700
Reply-to: classiccmp(a)u.washington.edu
From: Marvin <marvin(a)rain.org>
To: "Discussion re-collecting of classic computers"
<classiccmp(a)u.washington.edu>
Subject: Disk Drives, was Re: Find of the day
allisonp(a)world.std.com wrote:
>
> The -1 is no better. Considering they are a stepper they would be slower
> than the RD52,53,54s that have both more heads and voice coil positioner.
Snip!
ST251 is 60ms and ST251-1 is 40ms, I would rather take ST251 and cool
it properly like any HDs. If one is found without new defect and in
good order if ever.
But honestly, I don't want ST251 series, I would lie to the machine
with a different RDxx that has specs that matches or excceeds a
subsitute HD specs. Voice coil is best for that responsive status.
I find all HDs keep their cool in negative pressure air and let air
leak in through drive bezel opening with hd bezel taken off.
Looks ugly but works beauiful and that is exactly what done on my 3
3.5" HD in one machine one of 3 contains 7200rpm hd in it. All cool
like room temps.
Wizard
3:30 p.m.
New subject: firefox
I have a VaxStation 3520 in the garage that seems to boot. I gather it's
a dual-processor model and it has SCSI, RGB, AUI, and TK70, all intact and
able to boot. Problem is I have no KB, no mouse, and no head for it. (I
had hooked it up to a monitor that had the right cables but the wrong sync
stuff, so I had like four shaking images of the boot stuff.) Anyone know
of a good cheap place to gather the junque I need to get this thing
running right (and part numbers, etc)? It seems like a really nice box
except for the BI bus (it has Qbus too!), but I guess that's fine if I
stick with OpenVMS. ((Which version?))
TIA
jake
4:29 p.m.
New subject: firefox
running right (and part numbers, etc)? It seems like a
really nice box
except for the BI bus (it has Qbus too!), but I guess that's fine if I
stick with OpenVMS. ((Which version?))
The system is M-Bus, as for the version of VMS, I think it's still
supported, so probably anything from 5.5 up will probably work. Best
answer check the 7.2 SPD, which I unfortunatly don't have bookmarked.
Zane
| Zane H. Healy | UNIX Systems Adminstrator |
| healyzh(a)aracnet.com (primary) | Linux Enthusiast |
| healyzh(a)holonet.net (alternate) | Classic Computer Collector |
+----------------------------------+----------------------------+
| Empire of the Petal Throne and Traveller Role Playing, |
| and Zane's Computer Museum. |
| http://www.aracnet.com/~healyzh/ |
5:46 p.m.
New subject: firefox
At 23:30 15-09-1999 -0400, you wrote:
<snip>
running right (and part numbers, etc)? It seems like a
really nice box
except for the BI bus (it has Qbus too!), but I guess that's fine if I
stick with OpenVMS. ((Which version?))
Actually, NetBSD runs pretty darn good on those...
www.netbsd.org.
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Bruce Lane, Owner and head honcho, Blue Feather Technologies
http://www.bluefeathertech.com // E-mail: kyrrin(a)bluefeathertech.com
Amateur Radio: WD6EOS since Dec. '77
"Our science can only describe an object, event, or living thing in our
own human terms. It cannot, in any way, define any of them..."
7:43 p.m.
New subject: firefox
I have a VaxStation 3520 in the garage that seems to
boot. I gather it's
...
It seems like a really nice box
I've got one. It's a marginally OK box.
except for the BI bus
It's not BI. It's a special bus used only by the Firefox machines
(3520 and 3540).
Even though the box looks similar on the outside, it's not at all
like a 3500 on the inside.
(it has Qbus too!),
There were two different Q-bus adapters that could be used in it,
and both were crocks for different reasons. Apparently the TK50
controller was just about the only NPG Q-bus card that worked reliably
in the thing.
16 Sep
16 Sep
12:45 a.m.
New subject: firefox
stuff, so I had like four shaking images of the boot
stuff.) Anyone know
of a good cheap place to gather the junque I need to get this thing
running right (and part numbers, etc)? It seems like a really nice box
No idea.
except for the BI bus (it has Qbus too!), but I guess
that's fine if I
stick with OpenVMS. ((Which version?))
Any version after V5.4 will run that. Since 7.2 is available it's the
one to get. Nice box.
Allison
9231
days inactive
9231
days old
10 comments
7 participants
participants (7)
-
allisonp＠world.std.com -
eric＠brouhaha.com -
healyzh＠aracnet.com -
jpero＠cgocable.net -
jritorto＠nut.net -
kyrrin＠bluefeathertech.com -
marvin＠rain.org