Re: [expert] Got hands on RAID-1 or RAID-5?

2003-11-02 Thread Todd Lyons
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Greg Meyer wanted us to know:

>> No hardware RAID (on i586 architechture) supports this to my knowledge,
>> but then it was attested that linux software raid was always better
>> anyway:)

When it comes to data recovery, definitely not.

>No hardware RAID with IDE type devices.  

Not quite true.  The *ONLY* *TRUE* hardware IDE RAID:
   http://www.3ware.com
When they do comparisons against other RAID manufacturers, they compare
to SCSI RAID, because the other "IDE RAID" manufacturers simply do not
even come close.  If you are using HighPoint or Promise or any of those
other "IDE RAID" chipsets, you are *NOT* using hardware RAID, no matter
what they claim.

Having said that, Adaptec seems to have a card that is similar to the
3Ware card, but I've no experience with it.

>SCSI is very well supported because 
>it does not rely upon device drivers.

Linux does require device drivers to access the special scsi hardware.
Most kernels come with IDE precompiled in, but not SCSI.

Blue skies...   Todd
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Re: [expert] Got hands on RAID-1 or RAID-5?

2003-11-01 Thread Greg Meyer
On Saturday 01 November 2003 12:52 am, Jack Coates wrote:
> Yeah, I always wondered about the Inexpensive part when it's typically
> used with $1000 SCSI drives :-) Makes more sense if it was intended for
> IDE at first.

I think that it always was in relation to the cost of losing the data.  eg, 
the disk is less expensive than the data.

I just made that up, but it sounded good.
-- 
/g

"Outside of a dog, a man's best friend is a book, inside
a dog it's too dark to read" -Groucho Marx

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Re: [expert] Got hands on RAID-1 or RAID-5?

2003-11-01 Thread Greg Meyer
On Friday 31 October 2003 10:18 pm, James Sparenberg wrote:
> On Fri, 2003-10-31 at 16:21, Greg Meyer wrote:
> > On Friday 31 October 2003 07:21 pm, Michael Adams wrote:
> > > No hardware RAID (on i586 architechture) supports this to my knowledge,
> > > but then it was attested that linux software raid was always better
> > > anyway:)
> >
> > No hardware RAID with IDE type devices.  SCSI is very well supported
> > because it does not rely upon device drivers.
>
> Ironic,  RAID stands for Redundant Array of Inexpensive Disks and was
> originally an IDE concept.
>
I was not aware of that.  AFAIK, SCSI RAID has been around for eons.  I think 
first used it on a Novell 3.12 server back in 1993 or something like that.  
The machine was a compaq P90 server with a smart array controller.  3-4.3 GB 
hard drives gave us 8.5 GB of usable spce, which was wyy more that we 
could have ever imagined using.
-- 
/g

"Outside of a dog, a man's best friend is a book, inside
a dog it's too dark to read" -Groucho Marx

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Re: [expert] Got hands on RAID-1 or RAID-5?

2003-10-31 Thread HaywireMac
On Fri, 31 Oct 2003 21:52:52 -0800
Jack Coates <[EMAIL PROTECTED]> uttered:

> Yeah, I always wondered about the Inexpensive part when it's typically
> used with $1000 SCSI drives :-) Makes more sense if it was intended
> for IDE at first.

Originally (as per the Berkeley geekz), RAID stood for Redundant Array
of Inexpensive Disks. However, it's now more commonly defined as
Redundant Array of Independent Disks. Prolly because SCSI is used more
often, and they ain't "inexpensive" ;-)

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Re: [expert] Got hands on RAID-1 or RAID-5?

2003-10-31 Thread Jack Coates
On Fri, 2003-10-31 at 19:18, James Sparenberg wrote:
> On Fri, 2003-10-31 at 16:21, Greg Meyer wrote:
> > On Friday 31 October 2003 07:21 pm, Michael Adams wrote:
> > > No hardware RAID (on i586 architechture) supports this to my knowledge,
> > > but then it was attested that linux software raid was always better
> > > anyway:)
> > 
> > No hardware RAID with IDE type devices.  SCSI is very well supported because 
> > it does not rely upon device drivers.
> 
> Ironic,  RAID stands for Redundant Array of Inexpensive Disks and was
> originally an IDE concept. 

Yeah, I always wondered about the Inexpensive part when it's typically
used with $1000 SCSI drives :-) Makes more sense if it was intended for
IDE at first.

> 
> James
> 
> 
> 
> 
> __
> Want to buy your Pack or Services from MandrakeSoft? 
> Go to http://www.mandrakestore.com
-- 
Jack Coates
Monkeynoodle: A Scientific Venture...


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Re: [expert] Got hands on RAID-1 or RAID-5?

2003-10-31 Thread Salane KIng
On Friday 31 October 2003 10:42 pm, Salane KIng wrote:
> On Friday 31 October 2003 07:44 pm, Fajar Priyanto wrote:
> > On Saturday 01 November 2003 07:21 am, Michael Adams wrote:
> > > No hardware RAID (on i586 architechture) supports this to my knowledge,
> > > but then it was attested that linux software raid was always better
> > > anyway:)
> >
> > Hi Michael,
> > Can you show me how to do that?
> > Thanks
>
> Yes post it here.
Never mind here is a good HOWTO
http://www.tldp.org/HOWTO/Software-RAID-HOWTO.html

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Re: [expert] Got hands on RAID-1 or RAID-5?

2003-10-31 Thread Salane KIng
On Friday 31 October 2003 07:44 pm, Fajar Priyanto wrote:
> On Saturday 01 November 2003 07:21 am, Michael Adams wrote:
> > No hardware RAID (on i586 architechture) supports this to my knowledge,
> > but then it was attested that linux software raid was always better
> > anyway:)
>
> Hi Michael,
> Can you show me how to do that?
> Thanks
Yes post it here.

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Re: [expert] Got hands on RAID-1 or RAID-5?

2003-10-31 Thread James Sparenberg
On Fri, 2003-10-31 at 16:21, Greg Meyer wrote:
> On Friday 31 October 2003 07:21 pm, Michael Adams wrote:
> > No hardware RAID (on i586 architechture) supports this to my knowledge,
> > but then it was attested that linux software raid was always better
> > anyway:)
> 
> No hardware RAID with IDE type devices.  SCSI is very well supported because 
> it does not rely upon device drivers.

Ironic,  RAID stands for Redundant Array of Inexpensive Disks and was
originally an IDE concept. 

James



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Re: [expert] Got hands on RAID-1 or RAID-5?

2003-10-31 Thread Fajar Priyanto
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On Saturday 01 November 2003 07:21 am, Michael Adams wrote:
> No hardware RAID (on i586 architechture) supports this to my knowledge,
> but then it was attested that linux software raid was always better
> anyway:)

Hi Michael,
Can you show me how to do that?
Thanks
- -- 
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Re: [expert] Got hands on RAID-1 or RAID-5?

2003-10-31 Thread Greg Meyer
On Friday 31 October 2003 07:21 pm, Michael Adams wrote:
> No hardware RAID (on i586 architechture) supports this to my knowledge,
> but then it was attested that linux software raid was always better
> anyway:)

No hardware RAID with IDE type devices.  SCSI is very well supported because 
it does not rely upon device drivers.
-- 
/g

"Outside of a dog, a man's best friend is a book, inside
a dog it's too dark to read" -Groucho Marx

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Re: [expert] Got hands on RAID-1 or RAID-5?

2003-10-31 Thread Michael Adams
On Fri, 31 Oct 2003 06:52:29 -0500
Greg Meyer <[EMAIL PROTECTED]> wrote:

> On Friday 31 October 2003 03:33 am, Fajar Priyanto wrote:
> > Dear all,
> > I'm planning to try RAID-1 or RAID-5. Does anyone have any
> > experience on this? Can you pls tell me about it or give me an url?
> > Thanks guys.
> 
> I use  RAID 1 here on a small samba server.  Very easy to set up and
> get going.
> 
> There are a couple of really good HOWTO's on this topic over at
> tldp.org-- 
> /g
> 
> "Outside of a dog, a man's best friend is a book, inside
> a dog it's too dark to read" -Groucho Marx
> 
> 

RAID 5 is the best, no arguement. It requires three disks though. It
allows for one disk to be removed on failure, a new disk to be
installed, and the data to be rebuilt from the other two disks.
Excellent for mission critical stuff. The data effectively gets written
1.5 times across the three disks.

No hardware RAID (on i586 architechture) supports this to my knowledge,
but then it was attested that linux software raid was always better
anyway:)

-- 
Michael

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Re: [expert] Got hands on RAID-1 or RAID-5?

2003-10-31 Thread Greg Meyer
On Friday 31 October 2003 03:33 am, Fajar Priyanto wrote:
> Dear all,
> I'm planning to try RAID-1 or RAID-5. Does anyone have any experience on
> this? Can you pls tell me about it or give me an url?
> Thanks guys.

I use  RAID 1 here on a small samba server.  Very easy to set up and get 
going.

There are a couple of really good HOWTO's on this topic over at tldp.org
-- 
/g

"Outside of a dog, a man's best friend is a book, inside
a dog it's too dark to read" -Groucho Marx

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[expert] Got hands on RAID-1 or RAID-5?

2003-10-31 Thread Fajar Priyanto
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Dear all,
I'm planning to try RAID-1 or RAID-5. Does anyone have any experience on this? 
Can you pls tell me about it or give me an url?
Thanks guys.

- -- 
Fajar http://linux.arinet.org
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