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Errol Neal eneal at businessgrade.com
Mon May 9 02:41:46 UTC 2016

> On May 8, 2016, at 10:10 PM, Mike Mohr <akihana at gmail.com> wrote:
> Speaking from experience (I cannot go into detail on this point), and as
> Digimer pointed out, LSI seems to be the only choice for enterprise level,
> large scale deployments.
> If your concern is extremely long term deployments with verifiable data
> recovery options, software RAID is the only option, as you have strong
> guarantees that the implementation will never "die" as hardware RAID
> controllers are likely to do.
> As others have pointed out, there are indeed tangible benefits to using
> hardware RAID controllers. It all depends on your use case and project
> requirements.
> On May 8, 2016 6:51 PM, "Valeri Galtsev" <galtsev at kicp.uchicago.edu> wrote:
>> On Sun, May 8, 2016 8:42 pm, Digimer wrote:
>>> On 08/05/16 09:02 PM, Valeri Galtsev wrote:
>>>> On Sun, May 8, 2016 7:31 pm, Digimer wrote:
>>>>> On 08/05/16 08:12 PM, John R Pierce wrote:
>>>>>> On 5/6/2016 2:26 PM, Valeri Galtsev wrote:
>>>>>>> Which internal hardware RAID controllers will survive some future to
>>>>>>> come
>>>>>>> in your estimate. First of all my beloved 3ware finally seems to have
>>>>>>> passed away. After multiple acquisitions and becoming part of LSI and
>>>>>>> getting bought with LSI, it probably became non operational. Namely,
>>>>>>> the
>>>>>>> latest 3ware cards have ancient firmware. Neither of them supports
>>>>>>> 4kn
>>>>>>> drives. This speaks for itself for me. [Under new ownership] LSI,
>>>>>>> though
>>>>>>> still having new controllers released, and one of their MegaRAID
>>>>>>> controllers (at least) having support for 4kn drives, still may not
>>>>>>> last
>>>>>>> long (just my feeling, I'd like to hear yours). So, what RAID
>>>>>>> controllers
>>>>>>> will those of us who like to have hardware RAIDs use in some future
>>>>>>> to
>>>>>>> come?
>>>>>> IMHO, "Hardware" (really embedded firmware) RAID is for Windows
>>>>>> servers,
>>>>>> since MS Windows has awful integrated software raid (aka 'dynamic
>>>>>> disk',
>>>>>> truly a mess).   With Linux, I'd rather use LVM, with BSD, ZFS.
>>>>> "Hardware RAID" can very well include a controller with dedicated
>>>>> parity
>>>>> processing, battery/flash backed write caching and other tangible
>>>>> benefits.
>>>> Right, by "hardware RAID" as opposed to a bit more often used term
>>>> "software RAID" I did mean the card that has RAID processing done by the
>>>> chip on board of the card (parity or in other words modulus 2 sum in
>>>> case
>>>> of RAID-5, and more sophisticated math in case of RAID-6 - I have heard
>>>> of
>>>> at least two algorithms suitable for RAID-6). Thanks, Mr. Digimer, for
>>>> clarifying my somewhat vague in this place post.
>>> We're not all "Mr".
>> Sorry, my usual stupidity... Some time I hopefully learn to be, hm...
>> "wiser"?
>>>> Any insight, anybody, which hardware RAID cards of rather which
>>>> manufacturers of these cards will still make them in a future (say next
>>>> 5
>>>> years)? Even if you just have feelings, without any thought why, I would
>>>> like to hear them. If you prefer to answer off the list, please, e-mail
>>>> me
>>>> directly at galtsev at kicp.uchicago.edu
>>>> Thanks a lot!
>>>> Valeri
>>> LSI brand cards are very common across enterprise (I think all tier-1
>>> vendors, except HP, use LSI (now Avago) based controllers. Given that, I
>>> would expect their cards will be available for quite some time to come.
>> Thanks a lot for your insights! This already makes me feel better. In the
>> past LSI would be my definite second choice, and 3ware was winning me only
>> by their transparent web interface. (Several other things LSI had better
>> than 3ware IMHO...)
>> Thanks again!
>> Valeri
>>> --
>>> Digimer
>>> Papers and Projects: https://alteeve.ca/w/
>>> What if the cure for cancer is trapped in the mind of a person without
>>> access to education?
>>> _______________________________________________
>>> CentOS mailing list
>>> CentOS at centos.org
>>> https://lists.centos.org/mailman/listinfo/centos
>> ++++++++++++++++++++++++++++++++++++++++
>> Valeri Galtsev
>> Sr System Administrator
>> Department of Astronomy and Astrophysics
>> Kavli Institute for Cosmological Physics
>> University of Chicago
>> Phone: 773-702-4247
>> ++++++++++++++++++++++++++++++++++++++++
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