Date: Wed, 14 Nov 2007 11:10:07 -0800 (PST) From: Arne "Wörner" <arne_woerner@yahoo.com> To: freebsd-current@FreeBSD.ORG, bsd@fluffles.net Cc: olli@lurza.secnetix.de Subject: Re: geom_raid5 inclusion in HEAD? Message-ID: <165798.11850.qm@web30314.mail.mud.yahoo.com> In-Reply-To: <200711141853.lAEIr7rS027420@lurza.secnetix.de>
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--- Oliver Fromme <olli@lurza.secnetix.de> wrote:
> Just a small question: I noticed that the new gvinum
> raid5 implementation (in P4) allows adding disks to an
> existing RAID5, even while it is running. Does geom_raid5
> support that, too? (ZFS doesn't, unfortunately.)
>
Hi Oliver (or should I say inof)? :-)
Nope... graid5 doesnt do such things... I found no way, that could do it
without hurting the disks too much (I was afraid, that a power failure could
destroy the necessary knowledge about the size of the new-config-area; and I
didnt know how to do the beginning: it seemed like the first few blocks need a
special treatment, because there the new-config-area and the old-config-area
overlap)...
But Veronica is developing a tool, that can do it in offline mode... With
service interruption...
But growfs induces a service interruption anyway and it is buggy, if u do not
zero the new area... Veronica filed a bug report about this...
Nowadays it is common practice to have 2 ot more hosts, that can substitute
each other (hot-standby or how they call it today), so that it doesnt matter,
if a box is damaged or in maintenance mode or... isnt it?
P. S.: "It is... lovely weather we are having. I hope the weather continues."
(taken from "The Pink Panther (2006)") *rotfl*
Bye
Arne
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