Date: Thu, 7 Jul 2011 09:57:11 +0200 From: Gerrit =?ISO-8859-1?Q?K=FChn?= <gerrit@pmp.uni-hannover.de> To: George Sanders <gosand1982@yahoo.com> Cc: freebsd-fs@freebsd.org Subject: Re: Are thumpers still interesting in 2011 ? (raidz3 on x4500 @ 3.0gbps ...) Message-ID: <20110707095711.dfa208b5.gerrit@pmp.uni-hannover.de> In-Reply-To: <1310000480.20036.YahooMailRC@web120004.mail.ne1.yahoo.com> References: <1310000480.20036.YahooMailRC@web120004.mail.ne1.yahoo.com>
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On Wed, 6 Jul 2011 18:01:20 -0700 (PDT) George Sanders <gosand1982@yahoo.com> wrote about RE: Are thumpers still interesting in 2011 ? (raidz3 on x4500 @ 3.0gbps ...): GS> Is this indeed the case ? The six controllers that are built into a GS> "thumper" (a x4500) cannot see space beyond 2TB on a single disk ? I don't know what is built into Thumpers. If it is based on LSI1068 chipsets, 2TB is the limit. At least that is what I was told by several support people and also found out myself by doing some Google and by trying out several firmware versions available. It is a hardware limitation of the chipset that cannot be circumvented by a firmware update. However, one of the supportes I talked to claimed that the limitation only existed for SATA drives and SAS would be working beyond 2TB. I cannot say if this is really true, because I did not get any technical explanation why this should be different with SAS drives, and I do not have any SAS drives here to test. GS> This is very good information - thank you - as I was considering using GS> an old x4500 with 3TB disk drives... So just be careful and try it with one drive first before buying some dozen of them... :-) GS> Is there really no firmware update - from either LSI or Sun - that GS> fixes this ? I was told it is a hardware limitation and thus cannot be fixed. cu Gerrit
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