10 Apr
2007
10 Apr
'07
7:51 a.m.
Subject: Re: ST506 WTB:Micropolis 1325
From: "Andy Piercy" <andy.piercy at gmail.com>
Date: Tue, 10 Apr 2007 00:15:50 +0100
To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at
classiccmp.org>
Alison, thanks for the info, I'll have a go at opening one of the driver, as
currently they are only as much use as a large paper weight!
The basic problem is the head arm is stuck to the head park bumper.
One temporary fix reported was to freeze the drive rendering the bumper
unsticky.
Things to know:
Never move the heads on the platters if they are not rotating at speed.
Never touch platters.
Never use magnetic tools near platters (closer than 1"), that means tools
that may have remnant magnetism as well. demag them first!
You can spin the disk up (just apply power) with the cover off and watch
the head load action after bumper fix.
Once operational, the first thing I do with the drive is cover it up and
put it in a system where I back it up FIRST to another known good drive.
Just in case!!! The reason is to a know good drive is faster the copy
the less time the drive has if it's going to fail. I had one that failed
not for HDA reasons but once the HDA was working I found it would heat
up and quit (bad logic board).
One last item The RD53 and RD54 drives run hot (around 35W) and lots of
cooling was one way to insure they lasted longer. Heat is the enemy
of those older drives and it is not unusual to find a system there the
fans were dead or clogged and the drives failed..
Allison
Sridhar,
A clean box sounda a good idea, could you provide some detaile please?
Thanks,
Andy.
On 09/04/07, Sridhar Ayengar <ploopster at gmail.com> wrote:
>
> Andy Piercy wrote:
> > So anyway sorry to ramble, After you opened the drive, did you have any
> > problems with dust and head crashes? Do you think that it would be
> possible
> > to fabricate one of these bumpers? Do you have any pictures of this
> bumper
> > within the drive?
>
> You could always make a cleanbox to do the work in. It isn't difficult.
> There are plans available online, but if you have trouble finding
> them, I'd be willing to describe how I did it.
>
> Peace... Sridhar
>
11 Apr
11 Apr
10:29 p.m.
Allison wrote:
One last item The RD53 and RD54 drives run hot (around
35W) and lots of
cooling was one way to insure they lasted longer. Heat is the enemy
of those older drives and it is not unusual to find a system there the
fans were dead or clogged and the drives failed..
Jerome Fine replies:
Heat is the enemy of every drive, some more than others.
Most current 3.5" multi-GB drives generate so little
internal heat that it is not a problem.
Whereas, with any of my 5 1/4" ESDI drives, and ESPECIALLY
my Hitachi 600 MB FULL HEIGHT drives, I used to stack them
3 high (with a DC600A tape plastic case in-between to prevent
contact - just seemed to be best and I had a lot of spare
tapes) with a fan just an inch away used to cool them. In
addition, I used a PC power supply for all of the hard drives
and the fan rather than using the power supply from the BA123
box. This seems to provide a longer life for the BA123.
However, by trial and error (well mostly error), I found that
the TK50 and the TK70 tape drives MUST be powered directly
from the BA123.
Sincerely yours,
Jerome Fine
--
If you attempted to send a reply and the original e-mail
address has been discontinued due a high volume of junk
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'at' with the four digits of the current year.
12 Apr
12 Apr
1:08 p.m.
Jerome H. Fine wrote:
???
I am finding the most recent drives are much hotter than older ones.
I have a bunch of 3.5's under 10Gb that run way cooler than the newer,
10Gb++ lot.
Three of my seven newest 30+Gb disks have already fried and died and
one can't write anymore.
I've had to liquid cool the survivors because airflow just won't work
anymore without very cold air.
--
jd
fortune: cpu time/usefulness ratio too high -- core dumped.
Allison wrote:
One last item The RD53 and RD54 drives run hot
(around 35W) and
lots of cooling was one way to insure they lasted longer. Heat is
the enemy
of those older drives and it is not unusual to find a system there
the fans were dead or clogged and the drives failed..
Jerome Fine replies:
Heat is the enemy of every drive, some more than others.
Most current 3.5" multi-GB drives generate so little
internal heat that it is not a problem.
15 Apr
15 Apr
9:44 p.m.
jd wrote:
I am finding the most recent drives are much hotter
than older ones.
I have a bunch of 3.5's under 10Gb that run way cooler than the newer,
10Gb++ lot.
Three of my seven newest 30+Gb disks have already fried and died and
one can't write anymore.
I've had to liquid cool the survivors because airflow just won't work
anymore without very cold air.
Jerome Fine replies:
I purchased 3 * 40 GB ATA 100 3.5" Maxtor drives
in 2002. One died within a year and was replaced.
The other 2 died early this year followed almost
immediately by the replacement.
I now have 3 * 160 GB drives since they no longer
seem to make a 40 GB drive that is any less expensive.
But, even though they don't seem to run even warm
(I can touch them and they don't seem any warmer
than my hand), PC drives seem to fail after about
5,000 hours of use.
Sincerely yours,
Jerome Fine
--
If you attempted to send a reply and the original e-mail
address has been discontinued due a high volume of junk
e-mail, then the semi-permanent e-mail address can be
obtained by replacing the four characters preceding the
'at' with the four digits of the current year.
16 Apr
16 Apr
9:32 a.m.
Jerome H. Fine wrote:
The last round of drives were Maxtors. They were too hot to touch. Too
hot to handle when clamped in a heatsink with a good fan.
Liquid cooling kept the temp down to about 108 to 113 degrees
Fahrenheit. In winter.
Seagates before that which all failed when the warranty chip timed out.
--
jd
Klein bottle for rent -- inquire within.
jd wrote:
I am finding the most recent drives are much
hotter than older
ones. I have a bunch of 3.5's under 10Gb that run way cooler than
the newer, 10Gb++ lot. Three of my seven newest 30+Gb disks have
already fried and died and one can't write anymore. I've had to
liquid cool the survivors because airflow just won't work anymore
without very cold air.
Jerome Fine replies:
I purchased 3 * 40 GB ATA 100 3.5" Maxtor drives in 2002. One died
within a year and was replaced. The other 2 died early this year
followed almost immediately by the replacement.
I now have 3 * 160 GB drives since they no longer seem to make a 40
GB drive that is any less expensive.
But, even though they don't seem to run even warm (I can touch them
and they don't seem any warmer than my hand), PC drives seem to
fail after about 5,000 hours of use.
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days inactive
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