I happen to have an IBM SAN storage at home, so I am familiar with IBM line of storage products. The EXP3000 is an expansion to IBM storage, which can perform for itself (JBoD), however - it contains no CPU, or RAID abilities internally. You will have to connect it to an additional server (1U, I assume) which will include the RAID hardware, if you decide to use it, and OS.
I have not seen any commodity ATOM 1U systems. I know someone in my or IT Experts forum in Tapuz has asked about such a solution, and it is not simple to find. ATOMs are limited with the max amount of RAM. Desktop-class CPUs are also rather rare in the 1-2U markets, and are far from trivial to obtain, and worse - get service for. Ez On Fri, Sep 10, 2010 at 12:27 AM, Hetz Ben Hamo <het...@gmail.com> wrote: > Hi, > > 2010/9/9 Etzion Bar-Noy <eza...@tournament.org.il> > > This is a joke, right? You want someone to host your system, which, by >> design, will not be rack-mountable, and would be large, due to the amount of >> disks you are to place there. It is possible, but extremely expensive to >> host a non-1-U server nowadays. Who would "give" it to you? > > > Huh? Of course it will be rack-mountable. I'm planning to put it on a 2U or > 3U chassis. I'm also not looking for someone to host my hardware, I already > got a rack in Netvision today. > > >> An industrial-grade, 2U system could host, today, about 6 3.5" SATA disks. >> A 3 U can do much more, with up to 12-14 disks, depending on the system. >> > > IBM EXP 3000 can host 12 3.5" hard drives on a 2U chassis. See > this<ftp://public.dhe.ibm.com/common/ssi/ecm/en/tsd03025usen/TSD03025USEN.PDF>PDF > file. There are other 2U cases which can host 12 3.5" disks. > > And RAM is extremely important. Since you will not invest in an >> industial-class RAID controller (3ware, LSI-Logic, Adaptec, Intel, etc) >> which will cost several hundreds of dollars, as I see it, you would want to >> compensate for the high write latency with a large amount of RAM and fully >> buffered writes (not secure, but good enough). Especially with 7200RPM SATA >> drives with low seek speed. >> NFS shares, in "async" mode would give great performance, provided you >> give the system enough RAM. Then your RAM will actually become the disk >> write cache. >> > > Since this machine will not be using any Xeon with it's expensive RAM, I > could put some gigs of RAM quite easily. > > Thanks for your points. > Hetz > >> >> > Ez >> >> 2010/9/9 Hetz Ben Hamo <het...@gmail.com> >> >>> Hi, >>> >>> >>> 2010/9/9 geoffrey mendelson <geoffreymendel...@gmail.com> >>> >>> >>>> On Sep 9, 2010, at 6:35 PM, Hetz Ben Hamo wrote: >>>> >>>> >>>>> I'm planning to add some big storage solution to my VPS business. I did >>>>> some checking and calculated the costs, and figured out that if I want to >>>>> have a decent 12TB solution NAS box, it would be best if I would roll my >>>>> own. (12 TB before all the RAID stuff, after that it would lot less). All >>>>> other solutions are very expensive (example: IBM EXP 3000 costs here 6K >>>>> nis >>>>> without a single hard disk). >>>>> >>>>> >>>> The question you should be asking yourself, IMHO, is what can I buy that >>>> will be as reliable as a commerical, "industrial grade" server? >>> >>> >>> Not looking for industrial grade one. >>> >>>> >>>> I'm planning to use hardware based RAID card, minimal Linux >>>>> distribution and have some offers like iSCSI, NFS, CIFS - the usual >>>>> suspects. >>>>> >>>>> My question is: since I'll use hardware RAID card, which processor and >>>>> how much RAM should I put in such a machine? Xeon is overkill IIRC. >>>>> >>>> >>>> For example, a system which costs under 900 NIS would do the job. You >>>> can get them from Ivory or KSP. They have a dual core ATOM processor, >>>> one PCI slot and one DDR2 memory slot. The power supply is not very big, >>>> but it will power a bunch of 5400 rpm "green" disks. >>>> >>> >>> >>> This storage will be mainly used for backups. If someone wants to do a >>> colocation to my rack, I want to give him a bonus, something that you can't >>> find today with my competitors: I want to give him 50-100GB for storage. >>> You'll get an NFS/CIFS/iSCSI and you mount it to your machine and use it for >>> your backup/rsync/whatever. By comparison, when you colocate a server to >>> Netvision's farm, you get ... 5GB backup space.. yippee.. >>> >>> >>>> How well will it work? How long will it last? Will it be fast enough? >>>> >>> >>> "Fast" doesn't matter much when you're doing backups or storing some >>> temporary stuff, does it really matter when it take 20 seconds instead of 10 >>> when you're doing rsync? I don't think so.. >>> >>> >>>> And the "killer" question, how much will it cost to replace, in the >>>> value of downtime, your time to replace it, bad will among your customers, >>>> etc? >>>> >>> >>> Really depends. I'm not planning to fully use all the disks, some will be >>> disconnected or out of the RAID, perhaps I'll put a redundant PSU. >>> >>> Hetz >>> >>> >>>> Geoff. >>>> >>>> -- >>>> Geoffrey S. Mendelson, N3OWJ/4X1GM >>>> To help restaurants, as part of the "stimulus package", everyone must >>>> order dessert. As part of the socialized health plan, you are forbidden to >>>> eat it. :-) >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>> >>> -- >>> my blog (hebrew): http://benhamo.org >>> Skype: heunique >>> MSN: hetz-b...@benhamo.org >>> >>> _______________________________________________ >>> Linux-il mailing list >>> Linux-il@cs.huji.ac.il >>> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il >>> >>> >> > > -- > my blog (hebrew): http://benhamo.org > Skype: heunique > MSN: hetz-b...@benhamo.org >
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