RE: ATA Raid

From: Joel Jaeggli (joelja_at_darkwing.uoregon.edu)
Date: 02/05/04

  • Next message: Atkins, Brian: "RE: Download issues" 
    To: Fedora Users <fedora-list@redhat.com>
Date: Wed, 4 Feb 2004 16:33:19 -0800 (PST)

    On Wed, 4 Feb 2004, Jason Dixon wrote:

    > On Wed, 2004-02-04 at 11:09, Rodolfo J. Paiz wrote:
    >
    > > First off, my experience with software RAID (both 0 and 1) under Linux has
    > > been excellent, although I've as yet suffered no failures. However, I
    > > suggest forking over the cash for a 3Ware adapter, they're not that
    > > expensive. I went all out and got a 12-drive card for $560, but they have
    > > two- and four-drive cards that are darn cheap. And they are "real" hardware
    > > RAID, with excellent performance and other RAID modes (5, 10, etc.)
    > > available to boot. Plus, the kernel module is open-source and included
    > > since God-knows-when in the mainstream kernels, so you need to do NOTHING
    > > to make it work... it just works.
    > >
    > > What's not to love?
    >
    > What kind of monitoring do those support (syslog/snmp)?

    3dm is their management suite which has a command-line interface, and a
    small web-based interface... reports of disk related events will end up in
    syslog.

    > What has your
    > experience been? (I know you haven't had any failures, but surely you
    > have monitored _somthing_) :)

    it behaves a lot like any other nice raid system, with the right disk tray
    or with serial ata disks you can hot-swap dead drives, rebuild on the fly
    fail over to hot spares etc. if anything they've been more reiable for us
    than scsi some of scsi subsystems because a failing drive can't hang a bus
    shared with other disks size each drive has it's own port on the
    diskswitch controller.

    currently their controllers are limited to 2TB per filesystem, which is an
    issue for us but not for most people.

    in some occasions we use them in jbod mode and use linux software raid at
    which point some of their functionality goes away but they're still very
    nice controllers...

    > Thanks,
    >
    > 

    -- 
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Joel Jaeggli  	       Unix Consulting 	       joelja@darkwing.uoregon.edu    
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