2nd hard disk for MySQL/PostgreSQL database under RedHat 7.2

[drew at drewtaylor.com (Drew Taylor)]

But now they are back, albeit w/o the low end cards they initially had. It 
seems demand forced them to reconsider their decision. I've heard many good 
things about their products, and relatively few bad ones. A 3ware card is 
the only IDE RAID controller I'd consider. The prices are still reasonable 
for what you get, but mostly out of my (consumer) range.

Drew

At 02:07 PM 2/25/2002 -0500, Randall Hofland wrote:
>I suppose one thing to also ask is whether or not RAID ought to be considered,
>especially on a SCSI bus. The current IDE RAID options are sparse at 
>best(unfortunately)given
>the 3Ware pullout, and SCSI RAID is still a better choice.
>
> >[Jerry Feldman: Mon, Feb 25, 2002 at 11:24:58AM -0500]
> >> SCSI vs. EIDE.
> >> JABR mentiuoned that it is best to use SCSI if one has a SCSI controller.
>However, I remember
> >> seeing recently that IDE (or EIDE) today will give you just as good 
> performance.
>
> >
> >I don't want to bash IDE and the fact that they are a good deal for
> >the normal desktop.. but to say that they will give you performance
> >even competitive with scsi is not my experience at all.
> >
> >typical scsi throughput is 35MB/s.. cheetah's will do 40.. typicaly
> >udma/100 IDE performance (if you've got a chipset driver to support
> >DMA at that rate, which depends on your controller under linux) is
> >25.. I think the best I've come across is 30..
> >
> >scsi seek times are typically much faster too.. western digital's ide
> >caviar drives (ata/100) are 8.9ms and their corresponding 7200-spin
> >scsi drives are 6.9.. that's a 25% difference and in a seek-intensive
> >space like DB's you see that bigtime.
> >
> >>
> >> Today, IDE drives are still significantly less expensive than SCSI:
> >> eg. A 7200RPM 100GB EIDE drive is about $175, and  the largest SCSI I 
> could
>find is 73.4GB
> >> (10,000RPM) for about $465.
> >
> >yep.. $/MB is heavy in favor of IDE.. however, lots of times spindles
> >are just as impt as total MBs.. so you end up buying a fair number of
> >smaller drives instead of a single big one.. IDE is still cheaper, but
> >on the smaller drives the differential is a lot less and therefore
> >going cheap is less tempting..
> >
> >> For a commercial server, I would certainly go SCSI (or possibly 
> firewire...).
>But for a personal
> >> system or a home based or even a lightly loaded commercial server, IDE is
>much more
> >> economical.
> >
> >yep.
> >
> >if your limiting factor is network - go ide.. but if parallel load is
> >your big issue - you'll do a lot more a lot faster with scsi.
> >
> >-P
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> >
> >
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Drew Taylor                     JA[P|m_p|SQL]H
http://www.drewtaylor.com/      Just Another Perl|mod_perl|SQL Hacker
mailto:drew at drewtaylor.com      *** God bless America! ***