<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type"> </head> <body bgcolor="#ffffff" text="#000000"> Mr. Meyers experience with Linux and setting up RAID is lacking in his email. Do we want to listen to him? Anyone can read articles that might be slanted to begin with. Only the folks that have hands-on experience can offer advice from a more practical perspective. Who would you believe, someone who has done it, or someone who reads alot of tech articles? Your choice..... Ken Meyer wrote: <blockquote cite="midNJBBIKGJOOGHIEPGNPLAEELGCCAA.kmeyer@blarg.net" type="cite"> <pre wrap="">Mr. Linux Bigot (that's not a unique identifier around here) -- I recommend that you search the archives of this group for further information about this subject, which is one of those periodically appearing ones. A couple of previous items: <a class="moz-txt-link-abbreviated" href="http://www.storagereview.com">www.storagereview.com</a> maintains that there is very little performance benefit in striping drives (RAID 0), but of course, you multiply the jeopardy of a failure that will take you down by the number of drives striped-across. Others have said that the performance enhancement is greater -- but, Bottom Line, caveat emptor. Of course, the mirroring helps the reliability aspect, but if you are into four drives, why not go for RAID 5, which as I understand it, will only cost you one drive's worth of overhead? Chris Kacoroski has done experiments (results in the archives) and has found that the 3Ware RAID boards do well for large file transfers, but have real performance problems handling small, random file transfers as the thin client solution will create. Apparently, he even involved the 3Ware folks in trouble-shooting. Perhaps they have been able to address the problem since then, but as I recall, Chris has another recommendation for RAID controllers for use in LTSP systems. Again, caveat emptor. Ken Meyer -----Original Message----- From: <a class="moz-txt-link-abbreviated" href="mailto:k12osn-bounces@redhat.com">k12osn-bounces@redhat.com</a> [<a class="moz-txt-link-freetext" href="mailto:k12osn-bounces@redhat.com">mailto:k12osn-bounces@redhat.com</a>]On Behalf Of Calvin Dodge Sent: Friday, November 26, 2004 9:31 AM To: Support list for opensource software in schools. Subject: Re: [K12OSN] Hard Drive Upgrade Quandry Liam Marshall wrote: </pre> <blockquote type="cite"> <pre wrap="">I would like to get a Promise IDE raid controller, either the 4 or 6 </pre> </blockquote> <pre wrap=""> Make sure it's compatible with a stock Linux kernel. Typically, the low-priced RAID controllers are software-based (the driver hides this fact from the operating system), and sometimes the drivers are provided in binary-only format (like the Promise controller at one customer's location, which provided modules only for kernels from RH 7.2). You're really best off with a card with open-source drivers (like 3Ware, though I suspect that's out of your price range). </pre> <blockquote type="cite"> <pre wrap="">channel version, haven't decided yet. I was going to put on it 4 - 80 GB EIDE hard drives with 7200 rpm and 8MB cache each. I would use these in a raid 0+1 or raid 1+0 configuration. It is my understanding that this will give me the best of both mirroring for redundancy, and parity/spanning for performance. </pre> </blockquote> <pre wrap=""> Yes, although 2 80 gig drives cost quite a bit more than 1 160 gig drive. </pre> <blockquote type="cite"> <pre wrap="">If I am right in my understanding of raid levels 4 - 80GB drives in such a configuration will give me 160GB of storage space, with the other 160GB of the drives being used in a mirrored capacity right? </pre> </blockquote> <pre wrap=""> Yes. Calvin -- Calvin Dodge Certified Linux Bigot (tm) <a class="moz-txt-link-freetext" href="http://www.caldodge.fpcc.net">http://www.caldodge.fpcc.net</a> _______________________________________________ K12OSN mailing list <a class="moz-txt-link-abbreviated" href="mailto:K12OSN@redhat.com">K12OSN@redhat.com</a> <a class="moz-txt-link-freetext" href="https://www.redhat.com/mailman/listinfo/k12osn">https://www.redhat.com/mailman/listinfo/k12osn</a> For more info see <a class="moz-txt-link-rfc2396E" href="http://www.k12os.org"><http://www.k12os.org></a> </pre> </blockquote> </body> </html>