Date: Thu, 28 Oct 2004 15:39:34 -0600 From: secmgr <security@jim-liesl.org> To: Marko Raiha <mjraiha@fade.pp.fi> Cc: freebsd-stable@freebsd.org Subject: Re: question on vinum Message-ID: <41816716.7040906@jim-liesl.org> In-Reply-To: <20041028085112.GA16832@daemon.adsl.kpnqwest.fi> References: <200410270027.47092.miha@ghuug.org> <1098855222.15580.81.camel@emperor> <20041027100229.GB6391@daemon.adsl.kpnqwest.fi> <417FBA6F.7040406@jim-liesl.org> <20041028085112.GA16832@daemon.adsl.kpnqwest.fi>
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Marko Raiha wrote:
>Hi,
>
>On Wed, Oct 27, 2004 at 09:10:39AM -0600, secmgr wrote:
>
>
>>The reason is empirically derived. When I created a 7 disk raid 5 set
>>using "len 0" or all the space available, the raid set would be corrupt
>>after initializing. Every time. When I reserved back that extra
>>space, no corruption.
>>(freebsd 4.10-p3) There was a thread on this a few days ago.
>>
>>
>
>Thanks about pointing to this another thread. I read the thread and one
>thing is still a bit unclear. Do you mean by leaving 64 blocks unused to
>leave it unused at the beginning of disk before vinum partition (when
>doing partition to vinum by disklabeling freebsd slice) like this:
>
># /dev/aacd2s1:
>8 partitions:
># size offset fstype [fsize bsize bps/cpg]
> c: 143347932 0 unused 0 0
> h: 143347868 64 vinum
>
>or somewhere in subdisk as you said? I guess that inadvertently not
>right terms were used ("subdisk" instead of "disk"), because terminology
>with vinum is a bit complicated.
>
>All documentations I have found says that only 16 block should be left
>unused at the beginning of the disk like this:
>
># /dev/aacd2s1:
>8 partitions:
># size offset fstype [fsize bsize bps/cpg]
> c: 143347932 0 unused 0 0
> h: 143347916 16 vinum
>
>Regards,
>
>
That probably would have worked too. My mistake was to clone the c
partition entry, call it h, label it vinum, and use that
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