Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751127AbVJOFG3 (ORCPT ); Sat, 15 Oct 2005 01:06:29 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751126AbVJOFG3 (ORCPT ); Sat, 15 Oct 2005 01:06:29 -0400 Received: from gate.gau.hu ([192.188.242.65]:4232 "EHLO gate.gau.hu") by vger.kernel.org with ESMTP id S1751080AbVJOFG2 (ORCPT ); Sat, 15 Oct 2005 01:06:28 -0400 Date: Sat, 15 Oct 2005 07:06:26 +0200 (CEST) From: Lajber Zoltan To: Bill Davidsen Cc: Andrew Walrond , linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: Anybody know about nforce4 SATA II hot swapping + linux raid? In-Reply-To: <43508485.5040800@tmr.com> Message-ID: References: <200510071111.46788.andrew@walrond.org> <43508485.5040800@tmr.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1694 Lines: 34 On Sat, 15 Oct 2005, Bill Davidsen wrote: > As others have noted, SATA is young and should not be used for hot-swap, > at least in a production manner. I suggest the IBM ServeRAID controller > as one solution for SCSI. I have a bunch of servers in various places > around the country, and these have been good to me, work pretty well > with typical failures, and IBM supports them. We have about 7 serverraid card from 4L to 5i. All of them is sitting on shelf. They are pain to manage, ipssend tool is weak, serverdirector complicated. And they are slow, the Fusion MPT SCSI with sw raid significant faster, as we measured with bonnie++. Even the old aic7892 is faster (these built-in scsi controllers on xseries motherboards). For example: an xseries 345, serverraid 5i, raid5 from 10k rpm U160 disk read/write 30/12 MB/s. Same machine, same disk, with linux 2.6.x sw raid1 perform 40/26 MB/s. (this machine with QLA2340 FC HBA, emc cx700 storage: 116/67 MB/s). For raid5, an other x345 with Fusion MPT, 10k rpm U320 discs, 2.6.x sw raid 5 from 4 disk perform 110/75 MB/s, and this machine put out 127/85 on qla2340 FC HBA, emc cx700, raid5 from 8 10k rpm FC disks. Beside this, the scsi hotswap works well in xSeries. Bye, -=Lajbi=---------------------------------------------------------------- LAJBER Zoltan Szent Istvan Egyetem, Informatika Hivatal Most of the time, if you think you are in trouble, crank that throttle! - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/