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Date:      Wed, 29 May 2002 23:01:46 -0700
From:      "Eric Parusel" <lists@globalrelay.net>
To:        "Matthew Dillon" <dillon@apollo.backplane.com>, "Greg 'groggy' Lehey" <grog@FreeBSD.ORG>
Cc:        "Scott Long" <scott_long@btc.adaptec.com>, "Scott Long" <Scott_Long@adaptec.com>, "Doug White" <dwhite@resnet.uoregon.edu>, "Cy Schubert - CITS Open Systems Group" <Cy.Schubert@uumail.gov.bc.ca>, "Kirk Strauser" <kirk@strauser.com>, <freebsd-stable@FreeBSD.ORG>
Subject:   Re: Hardware RAID vs vinum
Message-ID:  <010501c2079f$7b37bc80$64805718@cns>
References:  <2C7CBDC6EA58D6119E4A00065B3A24CB04636E@btcexc01.btc.adaptec.com> <20020529134211.L82424@wantadilla.lemis.com> <20020529141141.GC2262@hollin.btc.adaptec.com> <20020530090247.Y82424@wantadilla.lemis.com> <200205300016.g4U0GaBY064168@apollo.backplane.com>

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>     But I will interject one point of interest, and that
is the cost factor.
>     As a friend of mine pointed out to me a few days ago,
the cost of
>     RAID hardware has dropped precipitously over the last
5 years.  It is
>     cheap enough now that one might as well just use it on
multi-disk
>     servers.  Hopefully this will result in more and
better drive support
>     in FreeBSD, I sometimes get the feeling that we've
dropped behind
>     in that area.

Mind if I squeak in one little comment on the state of
hardware RAID
card support...?
I wish I could back it up with come code, but I'm just a
lowly sysadmin :)
(maybe one day, in one way or another)

While as far as I can tell RAID card support is quite stable
(knock on
wood, thanks guys and girls), there's a noticable absence of
RAID array
control & status reporting software for many types of RAID
cards,
including my own (NetRAID 3i, amrd driver).

For instance, for my particular type of RAID controller I
cannot tell if the
array has degraded without walking up to the server and
seeing amber
warning lights.... :(    Good thing I'm not using these
cards in a colo :)
Even a simple syslog message saying "Houston, we have a
problem"
would be invaluable.. :)

Of course I'm definitely not expecting the world, just
though I'd point
this out :)   By the way I'm using either RELENG_4_5
or -stable on my
boxes...

Oh, and a question:  can software RAID mirrors (via vinum)
be booted from? (and still booted from if one drive goes
down?)

Thanks very much,
Eric Parusel



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