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Groups > comp.os.linux.hardware > #2588
| From | Aragorn <thorongil@telenet.be.invalid> |
|---|---|
| Newsgroups | comp.os.linux.hardware |
| Subject | Re: Bad Hitachi disk.... how so from a pic? |
| Followup-To | comp.os.linux.hardware |
| Date | 2014-12-07 18:37 +0100 |
| Organization | A noiseless patient Strider |
| Message-ID | <m6238e$jcl$1@dont-email.me> (permalink) |
| References | (3 earlier) <m61bpm$mhg$2@dont-email.me> <m61t3k$p5n$1@dont-email.me> <m61th4$qc1$2@dont-email.me> <m61u55$p5n$3@dont-email.me> <m620ci$7bb$1@dont-email.me> |
Followups directed to: comp.os.linux.hardware
On Sunday 07 December 2014 17:48, philo conveyed the following to
comp.os.linux.hardware...
> On 12/07/2014 10:10 AM, Aragorn wrote:
>
>> I've got a whole box of anything from Ultra Wide to Ultra 320 lying
>> around, and in capacities from 9 GiB to 36 GiB. Some of those came
>> out of a machine of my own, and others came out of a now defunct Dell
>> PowerEdge server that we were using back when we were still running
>> an IRC network. The ones from the Dell were installed in hardware
>> RAID configurations ─ RAID 5 and RAID 10.
>>
>> Some of those disks may be defective but I don't know which ones. My
>> colleague lumped them all together into a single box. There's about
>> six or eight of them. And they're all IBM or Hitachi UltraStars. ;-)
>
> A lot of people in town know that I'll take just about any computer
> parts they do not want. No CRT's though.
>
> Sometimes I come home and just find stuff on my porch.
> That's how I got the ultra-wides and scsi controllers.
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.
> 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.
> 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.
--
= Aragorn =
http://www.linuxcounter.net - registrant #223157
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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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