[ale] RAID "inexpensive" disks?

[Geoffrey]

James P. Kinney III wrote:
> Apparently so have you!  ;)
> 
> I can't remember what DASD was. 

direct access storage device

> 
> 
> 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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>>>>
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>>>
>>>should be
>>>
>>>>sent to listmaster at ale dot org.
>>>
>>>--
>>>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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> 


-- 
Until later: Geoffrey		esoteric at 3times25.net

I didn't have to buy my radio from a specific company to listen
to FM, why doesn't that apply to the Internet (anymore...)?


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