Re: raid controller recommendation

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Mike, sorry I am taking this off list - if you want we can bring it back on for the education of all, but it seems to tangent from 
discussion..anyway

I am planning on implementing a promise 6 channel raid 5 IDE card and you mentioned " Promise puts the drive hashes on the controller".  I am 
not sure I understand this, or what the ramifications mean.  At the least, i want to be able to understand what I may be getting myself into, if 
not try to minimize any painting myself into a corner...

Any info would be appreciated..

Thanks

-------------------------------------------
Chris McKeever
If you want to reply directly to me, please use cgmckeever--at--prupref---dot---com
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On Thu, 11 Dec 2003 15:09 , mike webster <mwebster@xxxxxxxxxxxxxxx> sent:

>I've been forced to use IDE RAID due to cost and capacity.
>I'm honestly not too keen on the whole IDE RAID thing, myself.  Promise
>puts the drive hashes on the controller, which means that if your
>controller dies - you're screwed.  You can't replace the controller and
>get your data back.  Its basically software raid, but with a controller
>card.  If you're doing anything mission critical, I'd really recommend
>going with a "real" hardware RAID solution.  Accusys makes a nice
>external RAID controller (SCSI), as does Infortrend - but they don't
>come cheap.  If you're stuck with IDE, Promise makes their RM4000,
>RM8000 and RM15000 external arrays which, in my opinion, are really
>cool.  Again, they aren't cheap, but really, really nice.  I'm currently
>using several of these.
>
>
>Mike.
>
>
>
>
>On Thu, 2003-12-11 at 15:00, Hans Müller wrote:
>> Am Donnerstag 11 Dezember 2003 21:24 schrieb mike webster:
>> > If you're looking for SCSI, go with adaptec.  For a simple ide solution
>> > with two drives I'd recommend the Promise TX-2000 card.  I've written up
>> > a howto: for the promise card if you'd like the link.
>> >
>> > Mike.
>> >
>> > On Thu, 2003-12-11 at 14:26, Raymond Norton wrote:
>> > > I have decided to do a hardware raid rather than struggle with the
>> > > software raid. What would be a good, inexpensive controller that can do
>> > > raid level 1?
>> when you use SCSI  Vortex or Adaptec.
>> when ATA or SATA then use 3ware. 3ware contolleres are seen by linux as a real 
>> raid conroller. The promise contoller somtimes show not the raid array but 
>> the disk. and when then you try to acces disk disk you can destroy your 
>> array.
>> 
>> 
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>
>
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