Re: SCSI/IDE and RAID [Was: 120 gb is the Largest hard drive I can put in my 4550?]

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#352

From: Rod Speed
Date: Fri, 05 Dec 2003 03:10

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"Cristian Croitoru" <c_croitoru@hotmail.com> wrote in message news:bqogia$24b7jv$1@ID-199004.news.uni-berlin.de...
>
> "Terry Collins" :
> >
> > For home and SOHO and SME, IDE is probably quite okay.
> >
> > But IDE isn't SCSI and without SCSI, you can not do RAID.
> >
> > It really is a "business risk"
> > How much do you loose per hour when the computer system goes down?
>
> Why do you say "without SCSI, you can not do RAID"?
> We have here 4 separate RAID systems on IDE.. RAID 0, 1, 0/1 and 5
> One has 1TB+ volume, six 200GB HDs on a six channel IDE controller

> One of the advantages of SCSI against IDE is "command queuing"
> This means that if the controller receives a number of commands and it is
> more efficient (time wise) to process them in a different order, it will do that.

> Parallel ATA can not do that

Some can.

> BUT SATA will!

And it remains to be seen if it gets used much.

> There is another solution I am looking into now: a self contained RAID
> 15 hotswap slots IDE enclosure that has a SCSI bridge so you can
> extend your server with an external pseudo-SCSI massive store..

> So there is scope..

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From: "Rod Speed" <rod_speed@yahoo.com>
Newsgroups: alt.sys.pc-clone.dell,aus.computers
Subject: Re: SCSI/IDE and RAID [Was: 120 gb is the Largest hard drive I can put  in my 4550?]
Date: Fri, 5 Dec 2003 14:10:17 +1100
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