[Gllug] [Fwd: Server]

[Peter Childs]

	From what I understand....

IDE Comes in two Breeds (5400RPM and 7200RPM) you can also get more cache
or less cache... Hard Disks Cost about £2 per Gb. (7200 cost more thatn
5400 and quite franckly I would not but 5400 disks for anything) You also
need to spend quite a bit (£300+) for a good controller if you are running
anything bigger than a desktop.

SCSI Comes in two Breeds (10KRPM and 15KRPM) smaller disks costing more
its about £8 per Gb. (Which more than counters the cost of the additional
IDE Controller)

I'm planning on running RAID 5. Given that the 3ware disk from dnuk comes
with a RAID controller it must have a large enough cache to cope.....

	I can't believe that SCSI is twice the speed of IDE as the numbers
surgest. Given that IDE disk are twice the size for 1/3 of the money.
Unless somone can point me at some techinical spec I don't see SCSI as
good value for money any more. (Any way I've seen more SCSI stuff fail
than I've seen IDE. personal exprance)

	As too Racks. They are big, ugley, and expensive (£1,000) Unless
you have big custom built server rooms they are pointless. We do have very
large server room with aircondidtioning. But the roof has been known to
leak (showers upstairs) and we would like to be able to move the computer
our of the puddle should the plumbing fail (we are not planning this and
its never leaked on the old computer (BULL DPS6) BUT)

	As too co-location all the staff are in the one office. Work needs
staff to communicate with customers and driver. Too collocate we would
need to co-locatate the staff.  we were planning on off sight backup and
we already have a UPS and Generator. We havn't written the web system yet
but that will still reliae on a human factor to despatch the cars.

	Thanks for all the ideas. Any more?

Peter Childs



On Sun, 23 Nov 2003, Martin A. Brooks wrote:

> At 16:00 23/11/2003 +0000, you wrote:
> >http://hardware.devchannel.org/hardwarechannel/03/10/20/1953249.shtml
>
> This was Slashdotted and ridiculed appropriately.  It's not scientific,
> it's not even relevant because the tests were poorly thought out - can
> anyone say "file fragmentation"?
>
> The difference between SCSI and IDE is nearly purely electronics and
> interface presentation. Some manufacturers ship better quality, i.e. with
> less defects, platters with SCSI than they do with IDE, some don't.
>
> I routinely use both IDE and SCSI in mission critical systems, the choice
> for SCSI usually revolves around the number of disks that are going to be
> hooked up to the system. That said, 3ware's utterly stunning RAID cards
> soon makes this point moot.
>
>
>
> Martin A. Brooks, Clues Ltd.
> http://www.clues.ltd.uk/
>
>
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