Re: Bad Hitachi disk.... how so from a pic?

From	philo <philo@privacy.net>
Newsgroups	comp.os.linux.hardware
Subject	Re: Bad Hitachi disk.... how so from a pic?
Date	2014-12-07 12:28 -0600
Organization	A noiseless patient Spider
Message-ID	<m62672$vsm$1@dont-email.me> (permalink)
References	(4 earlier) <m61t3k$p5n$1@dont-email.me> <m61th4$qc1$2@dont-email.me> <m61u55$p5n$3@dont-email.me> <m620ci$7bb$1@dont-email.me> <m6238e$jcl$1@dont-email.me>

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On 12/07/2014 11:37 AM, Aragorn wrote:
>

<snip>
>
> Well, as it happens to be, we're on opposite sides of the Big Pond, and
> I know for a fact that shipping something to the US is going to be very
> expensive ─ likewise for receiving anything from the US, due to customs
> fees.  I'm afraid my current financial status doesn't allow for it, or
> else I would gladly be shipping the stuff to you.
>

Thanks. As long as you are offering them /free/ I'll be right over to 
pick them up!


I do sometimes order stuff from overseas if it does not weigh much.

A few months back I ran out of space CMOS batteries and ran over to the 
local drug store where I figured they be 2 or 3 USD. Heck , they were 7 
USD each....absurd.

I ordered 20 of them from China at a total of 3.58 USD and that 
/included/ shipping!

>> I tested all of them and took the magnets out of some of the bad ones.
>> Those are the strongest magnets I've ever seen.
>
> Those are still low capacity disks compared to what's mainstream now,
> which means that there was much more of a clearing between the heads and
> the platters in those days, and more space between the sectors and
> cylinders.  So those magnets would indeed have been more powerful than
> the ones in use today.

If I put two of them together I needed to put one in a vice to get the 
other one off. Had to twist it off with a pliers

>
>> The one drive and controller I used in a Linux machine I setup for the
>> place where I do volunteer work. The machine is an early p-4 with a
>> minimal amount of RAM, but with the "ultra-wide" drive performs pretty
>> well.
>
> The thing with SCSI is that it requires a SCSI controller, and then the
> controller takes care of all the head positioning etc.  With IDE
> (PATA/SATA), all of that has to be executed by the CPU on the mainboard.
> This made SCSI drives much faster and snappier in the experience, even
> long after IDE had already surpassed the throughput capabilities of SCSI
> and became UDMA-capable.  So I'm not surprised that it performs very
> well on your old machine; there is less work for the main processor to
> waste CPU cycles on, compared to IDE (PATA/SATA).
>
> The main reason why there is a tendency now towards SATA disks even for
> enterprise solutions is that SATA disks are significantly cheaper than
> SCSI or SAS; you get to pay a much lower price per MiB with SATA than
> from SCSI/SAS.  Still, there still are enterprise environments where SAS
> has preference over SATA, for instance in storage area networks ─
> parallel SCSI is considered way outdated now.


Yes. even though I always build my machines from "old junk" at least I 
am now using SATA drives
>

Thread

Bad Hitachi disk.... how so from a pic? Jax <remove.bear.bottoms1@gmail.com> - 2014-12-06 14:44 +0000
  Re: Bad Hitachi disk.... how so from a pic? philo  <philo@privacy.net> - 2014-12-06 09:44 -0600
    Re: Bad Hitachi disk.... how so from a pic? notbob <notbob@nothome.com> - 2014-12-06 19:37 +0000
      Re: Bad Hitachi disk.... how so from a pic? philo  <philo@privacy.net> - 2014-12-06 14:54 -0600
      Re: Bad Hitachi disk.... how so from a pic? Jax <remove.bear.bottoms1@gmail.com> - 2014-12-06 22:50 +0000
        Re: Bad Hitachi disk.... how so from a pic? notbob <notbob@nothome.com> - 2014-12-06 23:13 +0000
      Re: Bad Hitachi disk.... how so from a pic? philo  <philo@privacy.net> - 2014-12-07 04:57 -0600
        Re: Bad Hitachi disk.... how so from a pic? Aragorn <thorongil@telenet.be.invalid> - 2014-12-07 16:52 +0100
          Re: Bad Hitachi disk.... how so from a pic? philo  <philo@privacy.net> - 2014-12-07 09:59 -0600
            Re: Bad Hitachi disk.... how so from a pic? Aragorn <thorongil@telenet.be.invalid> - 2014-12-07 17:10 +0100
              Re: Bad Hitachi disk.... how so from a pic? philo  <philo@privacy.net> - 2014-12-07 10:48 -0600
                Re: Bad Hitachi disk.... how so from a pic? Aragorn <thorongil@telenet.be.invalid> - 2014-12-07 18:37 +0100
                Re: Bad Hitachi disk.... how so from a pic? philo  <philo@privacy.net> - 2014-12-07 12:28 -0600
                Re: Bad Hitachi disk.... how so from a pic? Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2014-12-07 21:46 +0100
                Re: Bad Hitachi disk.... how so from a pic? Aragorn <thorongil@telenet.be.invalid> - 2014-12-07 22:27 +0100
                Re: Bad Hitachi disk.... how so from a pic? Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2014-12-08 00:36 +0100
                Re: Bad Hitachi disk.... how so from a pic? Richard Kettlewell <rjk@greenend.org.uk> - 2014-12-08 09:26 +0000
                Re: Bad Hitachi disk.... how so from a pic? Aragorn <thorongil@telenet.be.invalid> - 2014-12-08 11:31 +0100
                Re: Bad Hitachi disk.... how so from a pic? Richard Kettlewell <rjk@greenend.org.uk> - 2014-12-08 10:53 +0000
                Re: Bad Hitachi disk.... how so from a pic? Aragorn <thorongil@telenet.be.invalid> - 2014-12-08 17:48 +0100
                Re: Bad Hitachi disk.... how so from a pic? Richard Kettlewell <rjk@greenend.org.uk> - 2014-12-08 17:28 +0000
                Re: Bad Hitachi disk.... how so from a pic? Robert Nichols <SEE_SIGNATURE@localhost.localdomain.invalid> - 2014-12-08 08:43 -0600
                Re: Bad Hitachi disk.... how so from a pic? Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2014-12-09 11:02 +0100
                Re: Bad Hitachi disk.... how so from a pic? scott@alfter.diespammersdie.us (Scott Alfter) - 2014-12-09 23:35 +0000
                Re: Bad Hitachi disk.... how so from a pic? philo  <philo@privacy.net> - 2014-12-09 17:43 -0600
                Re: Bad Hitachi disk.... how so from a pic? philo  <philo@privacy.net> - 2014-12-09 17:54 -0600
                Re: Bad Hitachi disk.... how so from a pic? scott@alfter.diespammersdie.us (Scott Alfter) - 2014-12-10 20:22 +0000
                Re: Bad Hitachi disk.... how so from a pic? scott@alfter.diespammersdie.us (Scott Alfter) - 2014-12-10 20:27 +0000
                Re: Bad Hitachi disk.... how so from a pic? philo  <philo@privacy.net> - 2014-12-10 16:40 -0600
                Re: Bad Hitachi disk.... how so from a pic? Thomas Richter <thor@math.tu-berlin.de> - 2014-12-10 11:06 +0100
  Re: Bad Hitachi disk.... how so from a pic? Baho Utot <baho-utot@invalid.com> - 2014-12-06 13:39 -0500
    Re: Bad Hitachi disk.... how so from a pic? Jax <remove.bear.bottoms1@gmail.com> - 2014-12-06 22:51 +0000
  Re: Bad Hitachi disk.... how so from a pic? Johnny <johnny@invalid.net> - 2014-12-06 13:02 -0600
  Re: Bad Hitachi disk.... how so from a pic? Keith Keller <kkeller-usenet@wombat.san-francisco.ca.us> - 2014-12-06 16:04 -0800

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