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From: Stan Hoeppner <stan@hardwarefreak.com>
To: linux-raid@vger.kernel.org
Subject: Re: HBA Adaptor advice
Date: Sun, 22 May 2011 04:41:05 -0500	[thread overview]
Message-ID: <4DD8DA31.7030608@hardwarefreak.com> (raw)
In-Reply-To: <4DD7A80C.8050808@wildgooses.com>

On 5/21/2011 6:54 AM, Ed W wrote:

> In fact if you go back to my question, the *entire* point is that I
> don't want the choice of card to be a point of failure, ie it's my
> specific point to purchase a card such that it can be swapped out for
> near any other card in the event of failure.

You're given about 3 or 4 conflicting requirement now WRT your 'perfect'
HBA.

What HBAs are you currently using?  How many of your stated requirements
over the past few days do your current HBAs fulfill?

Do you have a tape or D2D backup system in place?

There is no guarantee that you can swap one dead HBA for another brand
with a different chipset on board and have it work without issue.  If
you are that concerned you need to buy two identical cheap HBAs so you
have a spare.  But wait!  You must have hardware write cache for md RAID
as well.  But if you do that, you're locked into that vendor's cards.
And on, and on...

I've never seen nor heard of a real SA in a business environment
vacillate like this over a simple RAID/HBA acquisition, as if the
company's entire 1st quarter net profit was being wrapped up in this HBA
purchase.  And I've never head of an SA being concerned about cable
tripping of all damn things taking down a server.

Something in this whole thread just doesn't jibe...

-- 
Stan



  parent reply	other threads:[~2011-05-22  9:41 UTC|newest]

Thread overview: 60+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-05-19 12:26 HBA Adaptor advice Ed W
2011-05-19 12:36 ` Roman Mamedov
2011-05-19 12:43   ` Mathias Burén
2011-05-19 14:06 ` Michael Sallaway
2011-05-19 19:10 ` Thomas Harold
2011-05-19 21:12   ` Rudy Zijlstra
2011-05-19 21:07 ` Brad Campbell
2011-05-20 20:58   ` Tobias McNulty
2011-05-20 21:23     ` Brad Campbell
2011-05-20  2:08 ` Andy Smith
2011-05-20  5:30   ` Stan Hoeppner
2011-05-21  9:52     ` Ed W
2011-05-20  7:33   ` Ed W
2011-05-20 10:21     ` Stan Hoeppner
2011-05-21 11:17       ` Ed W
2011-05-21 11:29         ` Rudy Zijlstra
2011-05-21 11:54           ` Ed W
2011-05-21 17:37             ` Leslie Rhorer
2011-05-22  9:41             ` Stan Hoeppner [this message]
2011-05-22 10:03               ` Rudy Zijlstra
2011-05-23  9:32                 ` Ed W
2011-05-21 17:05           ` Leslie Rhorer
2011-05-22  9:04         ` Stan Hoeppner
2011-05-22 10:09           ` Brad Campbell
2011-05-22 19:25             ` Stan Hoeppner
2011-05-22 20:57               ` Tobias McNulty
2011-05-22 21:13                 ` Johannes Truschnigg
2011-05-23  9:48                   ` Ed W
2011-05-23 10:44                     ` John Robinson
2011-05-22 23:19               ` Brad Campbell
2011-05-23  4:09                 ` Roman Mamedov
2011-05-23  5:54                   ` Brad Campbell
2011-05-23  6:08                     ` Roman Mamedov
2011-05-23 10:42                     ` Stan Hoeppner
2011-05-23 11:35                       ` David Brown
2011-05-23  6:54                 ` Stan Hoeppner
2011-05-23  7:23                   ` Brad Campbell
2011-05-22 23:44               ` Brad Campbell
2011-05-23  0:07                 ` Brad Campbell
2011-05-23  5:30                   ` Stefan /*St0fF*/ Hübner
2011-05-23 10:18                     ` Ed W
2011-05-23  9:58                 ` Stan Hoeppner
2011-05-23 10:33                   ` Ed W
2011-05-23 11:21                     ` Stan Hoeppner
2011-05-20 12:18     ` Joe Landman
2011-05-20 12:34       ` Roman Mamedov
2011-05-20 12:36         ` Mathias Burén
2011-05-20 12:48         ` Joe Landman
2011-05-20 13:21       ` Ed W
2011-05-20 14:23         ` Joe Landman
2011-05-20 20:01       ` Andy Smith
2011-05-20 20:12         ` Stan Hoeppner
2011-05-20 20:24         ` Drew
2011-05-20 20:58           ` Stan Hoeppner
     [not found]             ` <4DD7A100.2010807@wildgooses.com>
2011-05-22  8:13               ` Stan Hoeppner
2011-05-23  2:11 Jim Schatzman
2011-05-23  3:39 ` Tobias McNulty
2011-05-23 10:42   ` Ed W
2011-05-23 11:14 HBA Adaptor Advice Ed W
2011-05-23 11:55 ` Joe Landman

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