Date: Tue, 28 Sep 1999 12:52:58 +0930 From: Greg Lehey <grog@lemis.com> To: Laurence Berland <stuyman@confusion.net> Cc: FreeBSD Questions <questions@FreeBSD.org> Subject: Re: Raid Support Message-ID: <19990928125258.H94452@freebie.lemis.com> In-Reply-To: <37F029D1.BB4769B8@confusion.net>; from Laurence Berland on Mon, Sep 27, 1999 at 10:37:05PM -0400 References: <000b01bf0952$8c8a37e0$9001a8c0@jallen.alltel.net> <19990928115313.F94452@freebie.lemis.com> <37F029D1.BB4769B8@confusion.net>
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On Monday, 27 September 1999 at 22:37:05 -0400, Laurence Berland wrote: > Greg Lehey wrote: >> >> [Format recovered--see http://www.lemis.com/email/email-format.html] >> >> On Monday, 27 September 1999 at 21:41:08 -0400, Jeremy Allen wrote: >>> Hello FreeBSD People, >>> >>> I really want to include FreeBSD in my hosting services I am >>> planning to offer to my clients. The only thing I have a question >>> about is FreeBSD's Raid support. If it is possible can you tell me >>> what hardware is the best? I really need a good and solid Raid >>> Solution for some SCSI Drives. I am looking at needing about 100 >>> Gigabytes of storage. If you could tell me what Level's of RAID I >>> can get support for I would be overwhelmingly Happy. >> >> The only hardware RAID arrays supported by 3.3 are the DPT SmartRaid >> III and IV. They're old and slow; you're better off with Vinum >> (software RAID), as >> http://www.shub-internet.org/brad/FreeBSD/vinum.html indicates. >> >> We've just added support for the Mylex controllers in -CURRENT. Their >> performance is significantly higher, but we haven't any hard figures >> at the moment. Also, you shouldn't use this driver yet for production >> work. > > Are there plans to integrate the RAID-5 support into base vinum any time > soon? No. > Is it possible to get just vinum RAID-5 without all of netmax? Yes. RAID-5 is in the 3.3-RELEASE. Read the man page: we've seen a couple of bugs: 1. If you don't have all device nodes, 'vinum start' may panic the machine. This is being fixed as I write. 2. We've seen some strange panics when using RAID-5 with soft updates. They don't happen everywhere, but where they do they're quite reliable. If you're planning to use this constellation, be sure to test carefully. At the moment, I don't understand how the problem arises, so I don't have a fix. I've created a known bugs list at http://www.lemis.com/vinum/bugs.html. I'll update this as I go along; note also http://www.lemis.com/vinum/how-to-debug.html, which tells you what to do if you run into trouble. This information is also in vinum(4). Greg -- When replying to this message, please copy the original recipients. For more information, see http://www.lemis.com/questions.html See complete headers for address, home page and phone numbers finger grog@lemis.com for PGP public key To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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