Hi all,
Currently zfs is a major news in the storage area. It is very interesting to
read various details about it on varios blogs of Sun employees. Among the more
interesting I found was this:
http://blogs.sun.com/roller/page/bonwick?entry=raid_z
The point the guy makes is that it is
Would it really be that much slower to have a journal of RAID 5 writes?
On Fri, 2005-11-18 at 15:05 +0100, Jure Pečar wrote:
Hi all,
Currently zfs is a major news in the storage area. It is very interesting to
read various details about it on varios blogs of Sun employees. Among the
more
Moreover, and I'm sure Neil will chime in here, isn't the clean/unclean
thing designed to prevent this exact scenario?
The array is marked unclean immediately prior to write, then the write
and parity write happens, then the array is marked clean.
If you crash during the write but before parity
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Hi!
I just upgraded to mdadm-2.1 from mdadm-1.12.0 and noticed
that the following command (which is even mentioned in the
manual page) doesn't work anymore:
[EMAIL PROTECTED]:~ {838} $ mdadm -Ebsc partitions
mdadm: cannot open partitions: No such
-Original Message-
From: [EMAIL PROTECTED] [mailto:linux-raid-
[EMAIL PROTECTED] On Behalf Of Mike Hardy
Sent: Friday, November 18, 2005 2:24 PM
To: Dan Stromberg
Cc: Jure Pečar; linux-raid@vger.kernel.org
Subject: Re: raid5 write performance
Moreover, and I'm sure Neil will
Guy wrote:
It is not just a parity issue. If you have a 4 disk RAID 5, you can't be
sure which if any have written the stripe. Maybe the parity was updated,
but nothing else. Maybe the parity and 2 data disks, leaving 1 data disk
with old data.
Beyond that, md does write caching. I
On Friday November 18, [EMAIL PROTECTED] wrote:
So, I continue to believe silent corruption is mythical. I'm still open
to good explanation it's not though.
Silent corruption is not mythical, though it is probably talked about
more than it actually happens (but then as it is silent, I
-Original Message-
From: Mike Hardy [mailto:[EMAIL PROTECTED]
Sent: Friday, November 18, 2005 11:57 PM
To: Guy
Cc: 'Dan Stromberg'; 'Jure Pečar'; linux-raid@vger.kernel.org
Subject: Re: raid5 write performance
Guy wrote:
It is not just a parity issue. If you have a 4
