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Date:      Wed, 20 Jun 2001 21:05:18 -0700 (PDT)
From:      Tom Samplonius <tom@sdf.com>
To:        Troy Settle <troy@psknet.com>
Cc:        "Forrest W. Christian" <forrestc@imach.com>, freebsd-isp@FreeBSD.ORG
Subject:   RE: RAID/vinum options (mail server)
Message-ID:  <Pine.BSF.4.05.10106202101450.19245-100000@misery.sdf.com>
In-Reply-To: <GIEHKBHPBGKJPNMBCOHFKECNCBAA.troy@psknet.com>

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On Wed, 20 Jun 2001, Troy Settle wrote:

> 
> Not so lucky :(
> 
> The degraded message didn't show up until after reboot (as part of the
> device ID when the kernel is reading the disk label.  The information is
> stored in DMESG.
> 
> The only RAID card that I know of with tools in the OS is Mylex (man
> mlxcontrol).  I can't tell from the man page if you can actually do anything
> useful (like detach a physical drive, reattach, start a rebuild, etc...).
> 
> I guess this is one area where NT has left us behind :(

  mlxcontrol can trigger rebuilds of arrays on the mlx driver, not the
mly.  It is pretty much automatic:  just hookup the new drive, and issue
the rebuild command.  Of course, I was using a managed enclosure, so
things like detaching the physical drive, and re-attach are automatic.

  Using the mly driver things actual seem easier.  Disk failures are
reported to syslog.  Removing the disk, and plugging in the new disk
triggers a rebuild which is also reported to syslog.  When the array is
back to full state, it is logged to syslog as well.  The only management
tool I need is something to check the health in case I miss a syslog
message.  Everything else is automatic.


Tom


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