[nmglug] Production server question

[Andres Paglayan]

On Fri, 2009-03-27 at 17:41 -0600, Gary Sandine wrote:

> On Fri, Mar 27, 2009 at 04:58:08PM -0600, Brendan wrote:
> > For SCSI, that's true, but SATA (generally) has native hot swap
> > capability without notifying the disk subsystem.
> 
> Well, I didn't now that.  If it's possible to just unplug and replug
> without echoing commands into /proc/scsi/scsi, that changes things a
> bit.  All that's left is mdadm commands, perhaps before and
> definitely after the disk change.  However, I think it's not as easy
> to make a fatal mistake with mdadm as it is with /proc/scsi/scsi.
> mdadm seems to catch potential array killing commands and refuse to
> do them by 

very interesting, I was totally unaware of that,
so probably some doc reading previous to the set up and ensuring
existence of an spare drive 
(anyhow), (you can always wait until the week end after the spare got
used to place another one)


> 
> > The only thing worse than having no RAID is, after RAID saves your
> > ass, accidentally crashing the system anyhow and being unable to
> > restart your RAIDs because a drive is missing ;-)
> 
> Yuck.
> 

-------------------------------
Andres Paglayan
o:
(505) 629-4344
m:
(505) 690-2871
f:
(505) 629-1008
h:
(505) 986-1561
andres at paglayan.com
--------------------------------


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