Archived posting to the Leica Users Group, 2008/08/23

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Subject: [Leica] RAID controllers?
From: photo at frozenlight.eu (Nathan Wajsman)
Date: Sat Aug 23 22:03:50 2008
References: <200808211752.m7LHphD3012630@humboldt1.com> <18607.10833.370800.433984@almost.alerce.com> <5AD6A21C-D97E-47F5-B055-8A885F7F7B54@frozenlight.eu> <48B04FFA.6010407@innerside.demon.nl>

Thanks, Meino. Sounds similar to this one:
http://www.wdc.com/en/products/products.asp?driveid=466&language=en
which I saw in a local shop for ?299 yesterday, except that it had a  
FW as well as USB interface.

Cheers,
Nathan

Nathan Wajsman
Alicante, Spain
http://www.frozenlight.eu
http://www.greatpix.eu
http://www.nathanfoto.com

Books: http://www.blurb.com/bookstore/search?search=wajsman&x=0&y=0
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On Aug 23, 2008, at 7:59 PM, Meino de Graaf wrote:

> Nathan
>
> have a look at http://www.lacie.com/nl/products/product.htm?pid=10963
>
> they also exist for firewire
>
> Meino
>
> Nathan Wajsman wrote:
>> This whole thread has been quite interesting, as I have considered  
>> a neater approach to external disks than the JBOD approach I use  
>> now. So, going back to basics. I understand what Raid 0, 1, 5 mean.  
>> What I would like is a Raid 1 or 5 solution with as much capacity  
>> as possible, at a reasonable price, and able to work with my iMac  
>> (in other words, no possibility for a Raid controller card, it must  
>> be able to plug into one of the FW or USB ports and be controlled  
>> by software). Does such a thing exist, or am I better off staying  
>> with JBOD?
>> Nathan
>> Nathan Wajsman
>> Alicante, Spain
>> http://www.frozenlight.eu
>> http://www.greatpix.eu
>> http://www.nathanfoto.com
>> Books: http://www.blurb.com/bookstore/search?search=wajsman&x=0&y=0
>> PICTURE OF THE WEEK: http://www.fotocycle.dk/paws
>> Blog: http://www.fotocycle.dk/blog
>> On Aug 22, 2008, at 11:06 PM, George Hartzell wrote:
>>> Gary Todoroff writes:
>>>> Very thoughtful and informative reply, George. Would love to debate
>>>> over a beer sometime! [...]
>>>
>>> I think that it wouldn't be much of a debate, at the end of the day
>>> we're pretty much in agreement.  Over the years we've all learned  
>>> all
>>> kinds of lessons about organizing our data on computers.  A lot of
>>> what I've internalized isn't really appropriate anymore (multi core
>>> systems with fast internal buses make it more reasonable to do
>>> software raid, terabyte drives mean that I no longer have to glue
>>> storage together out of too-small peices, although fast & large file
>>> size cameras have me generating more data than ever) but there are  
>>> new
>>> reasons for slicing and dicing.
>>>
>>> I was reacting to the idea of not putting the OS on a raid for
>>> stability reasons, and I still think that's not an issue.  Your
>>> comment
>>>
>>>> [...] data only on
>>>> the RAID, OS on the IDE (or is it SATA?) drive that runs the  
>>>> computer
>>>> and will be there no matter what happens to the RAID.
>>>
>>> still makes it seem that you don't see the RAID devices as a  
>>> source of
>>> stability, but we can just agree to differ on that.
>>>
>>>> I also like the
>>>> performance advantage that puts the OS overhead on one disk, while
>>>> the data read/writes are the only function of the RAID.
>>>
>>> One of the nice things about putting everything on the mirror is  
>>> that
>>> it gives the OS a chance to interleave and nearly-optimally schedule
>>> IO requests onto both of the drives, you get 2x read speeds while
>>> reading in LightRoom for the first time, then 2x read speeds while
>>> reading in your images, then if necessary app and image reading in
>>> parallel.
>>>
>>> But anyway, it's been a fun discssion,
>>>
>>> g.
>>>
>>>
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In reply to: Message from datamaster at northcoastphotos.com (Gary Todoroff) ([Leica] RAID controllers?)
Message from hartzell at alerce.com (George Hartzell) ([Leica] RAID controllers?)
Message from photo at frozenlight.eu (Nathan Wajsman) ([Leica] RAID controllers?)
Message from meino at innerside.demon.nl (Meino de Graaf) ([Leica] RAID controllers?)