> 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 >> ++++++++++++++++++++++++++++++++++++++++ >> _______________________________________________ >> CentOS mailing list >> CentOS at centos.org >> https://lists.centos.org/mailman/listinfo/centos >> > _______________________________________________ > CentOS mailing list > CentOS at centos.org > https://lists.centos.org/mailman/listinfo/centos