On 02/22/2018 07:45 AM, Ulrich Tagge via cctech wrote:
> /Here is my list. 6x RD54 (Maxtor XT2190) >2x OK, 2x Media Error, 1x
> Actuator Issue, 1x Head issue 3x RD53 (Micropolis 1325) >2x Actuator
> issue, 1x actuator issue followed by spinning issue (speed sensor?)
1325s with head stuck will norma
A tangential question out of curiosity: who here has 5.25" MFM
drives they're extremely surprised are still working, and which
model(s)?
...
- John
I¹m always surprised when I get my hands on an old st238 and it still
works, the amplifiers were run out of spec on mos
I have a Quantum Q540 (36mb; labeled RD-52) that works
perfectly. I love the sound of the spin-up on those drives.
Get Outlook for iOS
On Thu, Feb 22, 2018 at 8
/Here is my list. 6x RD54 (Maxtor XT2190) >2x OK, 2x Media Error, 1x
Actuator Issue, 1x Head issue 3x RD53 (Micropolis 1325) >2x Actuator
issue, 1x actuator issue followed by spinning issue (speed sensor?) 4x
Seagate ST251 >4x OK 3x Seagete ST225 >3x OK 3x IBM Type 068 >3x Dead On
the 3.5" side
On Fri, 9 Feb 2018, js--- via cctalk wrote:
A tangential question out of curiosity: who here has 5.25" MFM drives they're
extremely surprised are still working, and which model(s)?
I'll start. I've quite a few MFM drives, but the ones that really surprise
me are (2) Seagate ST-506, and (2)
On 02/09/2018 12:14 PM, allison via cctalk wrote:
>
> The grand daddy of them all is the RL02 salvaged in 1983 and still
> running along with two packs from then. Its life was 9 years of
> Monday through Friday power on and now intermittent about 5 times a
> month since 1994. Still booting a PD
On Fri, 9 Feb 2018, js--- via cctalk wrote:
A tangential question out of curiosity: who here has 5.25" MFM drives
they're extremely surprised are still working, and which model(s)?
I'll start. I've quite a few MFM drives, but the ones that really surprise
me are (2) Seagate ST-506, and (2) IMI
On 02/09/2018 01:05 PM, js--- via cctalk wrote:
>
>
> On 2/9/2018 12:25 PM, Chuck Guzis via cctalk wrote:
>> On 02/09/2018 05:20 AM, allison via cctalk wrote:
>>
>>> At the other extreme I have over a dozen Quantum D540s (RD52 31mb full
>>> height)
>>> that are really old and getting older and stil
On 2/9/18 10:05 AM, js--- via cctalk wrote:
> A tangential question out of curiosity: who here has 5.25" MFM drives they're
> extremely surprised are still working, and
> which model(s)?
Looking around after purging about 100 dead drives a few months ago..
CDC Wrens seem to be holding up OK,
On 2/9/2018 12:25 PM, Chuck Guzis via
cctalk wrote:
On 02/09/2018 05:20 AM, allison via cctalk wrote:
At the other extreme I have over a dozen Quantum D540s (RD52 31mb full
height)
that are really old and getting older and still work without issues.
Some of those
have sat on the shelf for
On 02/09/2018 05:20 AM, allison via cctalk wrote:
> At the other extreme I have over a dozen Quantum D540s (RD52 31mb full
> height)
> that are really old and getting older and still work without issues.
> Some of those
> have sat on the shelf for a decade and work fine when I need one.
I've sti
On 02/09/2018 01:40 AM, Chuck Guzis via cctalk wrote:
> On 02/08/2018 10:17 PM, Glen Slick via cctalk wrote:
>> Any idea if the drive orientation during storage might make any
>> difference in the failure rate? Usual PCB side down, PCB side up,
>> either side down, either end down? My guess it that
> -Original Message-
> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of emanuel
> stiebler via cctalk
> Sent: 09 February 2018 08:16
> To: Ian ; General Discussion: On-Topic and Off-Topic
> Posts
> Subject: Re: Maxtor full-height 5.25" drives o
On 2018-02-08 21:05, Ian via cctalk wrote:
> On Feb 8, 2018, at 11:03, Tom Gardner via cctalk
> wrote:
>>
>> XT2190 was first produced in 3Q 1984 and last produced in 1989 which gives
>> yours a remarkable life span and well beyond the them at most 5 year
>> warranty.
>> Be thankful they lasted
On 02/08/2018 10:17 PM, Glen Slick via cctalk wrote:
> Any idea if the drive orientation during storage might make any
> difference in the failure rate? Usual PCB side down, PCB side up,
> either side down, either end down? My guess it that it is best to
> store them in the usual PCB side down orie
Any idea if the drive orientation during storage might make any
difference in the failure rate? Usual PCB side down, PCB side up,
either side down, either end down? My guess it that it is best to
store them in the usual PCB side down orientation, but that is just a
guess.
On 2/8/18 4:03 PM, Ian via cctalk wrote:
>
> I don’t have a lot of background here- what goes wrong with them?
>
I have been told a common failure mode was for them to open. Maybe something
bad happens between the platter and head over time (metal-metal corrosion)?
And who knows what sort of
>
>> On 02/08/2018 12:28 PM, Al Kossow via cctalk wrote:
>>
>> Little concrete analysis has actually been done on these drives that has
>> been released outside the
>> drive recovery shops.
Al, thanks for the thoughtful response- I was genuinely unaware heads could
simply fail outside of the
On 02/08/2018 12:28 PM, Al Kossow via cctalk wrote:
>
>
> On 2/8/18 12:05 PM, Ian via cctalk wrote:
>> it seems no one on the list is interested in discussion beyond anecdotes
>> when it comes to 80s hardware.
>>
>
> Little concrete analysis has actually been done on these drives that has been
er" ; "General Discussion: On-Topic and
Off-Topic Posts"
Sent: Thursday, February 08, 2018 3:05 PM
Subject: Re: Maxtor full-height 5.25" drives of death
On Feb 8, 2018, at 11:03, Tom Gardner via cctalk wrote:
>
> XT2190 was first produced in 3Q 1984 and last produced
On 2/8/18 12:05 PM, Ian via cctalk wrote:
> it seems no one on the list is interested in discussion beyond anecdotes when
> it comes to 80s hardware.
>
Little concrete analysis has actually been done on these drives that has been
released outside the
drive recovery shops.
I would suspect the
On Feb 8, 2018, at 11:03, Tom Gardner via cctalk wrote:
>
> XT2190 was first produced in 3Q 1984 and last produced in 1989 which gives
> yours a remarkable life span and well beyond the them at most 5 year warranty.
> Be thankful they lasted this long.
Good point.
The lisp machines I’ve been
XT2190 was first produced in 3Q 1984 and last produced in 1989 which gives
yours a remarkable life span and well beyond the them at most 5 year warranty.
Be thankful they lasted this long.
Tom
-Original Message-
From: Ian Finder [mailto:ian.fin...@gmail.com]
Sent: Wednesday, February 07
Sent: Wednesday, February 7, 2018 11:50:09 AM
To: allison; General Discussion: On-Topic and Off-Topic Posts
Subject: Re: Maxtor full-height 5.25" drives of death
> Drives of the day were power hungry and ran hot. Heat is a killer.
Yes, certainly heat is why these drives go onto a shelf wor
On 02/07/2018 11:36 AM, Ian Finder via cctalk wrote:
> XT2190s, XT1140s, some of the early ESDI disks...
> I have 6 XT2190s at home, and maybe one of the damn things works.
>
> Does anyone out here know, beyond speculation, what some of the common
> failure modes of these drives are? I'm not oppos
> Drives of the day were power hungry and ran hot. Heat is a killer.
Yes, certainly heat is why these drives go onto a shelf working and come
off of it broken with servo and head amplifier problems at an astonishing
rate far higher than their contemporary brethren.
It also helps answer my questio
On 2/7/18 2:36 PM, Ian Finder via cctalk wrote:
XT2190s, XT1140s, some of the early ESDI disks...
I have 6 XT2190s at home, and maybe one of the damn things works.
Does anyone out here know, beyond speculation, what some of the common
failure modes of these drives are? I'm not opposed to open-
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