[ale] RAID "inexpensive" disks?

[James P. Kinney III]

Apparently so have you!  ;)

I can't remember what DASD was. 


On Tue, 2002-10-01 at 20:02, James S. Cochrane wrote:
> Inexpensive compared to DASD on mainframes.  The RAID acronym has been 
> around a LONG time :-)
> 
> James
> 
> At 11:28 PM 9/30/02 -0400, James P. Kinney III wrote:
> >Yep, scsi doesn't qualify as "inexpensive". But the big difference is in
> >the anticipated lifetimes as measured by manufacturers warranties.
> >
> >Most IDE drive come with a 1 year. Some have only a 90 day. A few
> >actually have a longer, 3 year warranty. That count is dropping fast.
> >
> >SCSI drive almost always come with at least a 3 year warranty. Many come
> >with a 5 year warranty. The are built to PERFORM for extended periods of
> >time. IDE is engineered to be used intermittently.
> >
> >A big factor in the price difference is the degree of on-disk brains
> >that scsi has compared to IDE. IDE drives are pretty dumb.
> >
> >RAID stuff:
> >
> >Software raid is pretty cool. Using a trio of drives, I had a small boot
> >drive and a pair that made up a raid mirror for the user data. It is not
> >as fast as hardware raid, but works on nearly anything. Good quality IDE
> >drives and software RAID are "The Poor Man's RAID Solution".
> >
> >Of course, 15k rpm Ultra160 SCSI Cheetahs on an Adeptec 3 channel RAID
> >in a RAID 5 setup is screaming fast.
> >
> >Cost is NOT a linear relation to data through put :(
> >
> >On Mon, 2002-09-30 at 21:56, Stephen Turner wrote:
> > > uh, just an observation but :-p raid is typically used with scsi disks,
> > > which arent inexpensive, on the contrary, they seem to be storing less
> > > than ide and more expensive.... oh well on to my question, since ide is
> > > inexpensive, and reaching nice speeds would it be appropriet to use ide in
> > > a raid formation? would it be near performance of normal raid with scsi? i
> > > was interested in opinions from experienced guys and i dont know any
> > > myself except this mailing list so :), also whats your opinions on best
> > > performance/redundant configurations? i noticed raid 0,1 configuration
> > > seemed to be nice, striping and mirroring together (which is possible
> > > right?) running 2 raid arrays, each with 3 or so disks stripped and the
> > > first and second array mirrord, .... 6 disks total, one fast and redundant
> > > array right? im sorry for the possible ignorance in this letter, i have no
> > > experience with raid and im just trying to get berrings and such :) also
> > > just wanted to start a convo too so :) thanks for your time
> > >
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> >--
> >James P. Kinney III   \Changing the mobile computing world/
> >President and CEO      \          one Linux user         /
> >Local Net Solutions,LLC \           at a time.          /
> >770-493-8244             \.___________________________./
> >
> >GPG ID: 829C6CA7 James P. Kinney III (M.S. Physics)
> ><jkinney at localnetsolutions.com>
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> >
> >
> 
> 
> 
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-- 
James P. Kinney III   \Changing the mobile computing world/
President and CEO      \          one Linux user         /
Local Net Solutions,LLC \           at a time.          /
770-493-8244             \.___________________________./

GPG ID: 829C6CA7 James P. Kinney III (M.S. Physics)
<jkinney at localnetsolutions.com>
Fingerprint = 3C9E 6366 54FC A3FE BA4D 0659 6190 ADC3 829C 6CA7 



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