Date: Wed, 19 Jul 2006 12:01:27 -0300 From: "Alexandre Biancalana" <biancalana@gmail.com> To: freebsd-geom@freebsd.org Subject: Re: geom_stripe error Message-ID: <8e10486b0607190801w8f6ed55kd4c601a00e5f279b@mail.gmail.com> In-Reply-To: <20060718214657.63152.qmail@web30303.mail.mud.yahoo.com> References: <8e10486b0607181351u1319483w87d40792d6c1cce8@mail.gmail.com> <20060718214657.63152.qmail@web30303.mail.mud.yahoo.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On 7/18/06, R. B. Riddick <arne_woerner@yahoo.com> wrote: > > --- Alexandre Biancalana <biancalana@gmail.com> wrote: > > Really is happening what you told.... the partition concat/concat1 have > the > > number 31, but in gstripe list it appears at position 21 position.... > (see > > my first email) > > > Hmm... > > Oh... > > I just had a closer look at the funtion "list_one_geom" in > /usr/src/sbin/geom/core/geom.c and found out, that the order of the disks > in > the "gstripe list" output does not say so much... It is possibly the order > in > which the disks are added to the device... Somehow the consumers (disks) > are > stored in a list and in an array (just in this array the position > corresponds > with the disk number, but in the list no order is necessary)... > > So my theory was wrong... > > Did you try an easier and more efficient configuration in the meantime? OK Arne ! I think that you're right ! I just done the configuration like you said bellow. I'm testing it now. E.g.: > gconcat(gstripe(4 * 200GB), gstripe(4 * 73GB)) > or so... > Possibly you would have to use bsdlabel in order to re-partition your > disks... > And you would loose your data... > But when u r done it might be much faster, because striping over > partitions of > the same disk is quite slow, I think... The advantage of striping (RAID0) > is > (if I recall correctly) that we can have higher parallelism (e. g. a RAID0 > on > 10 disks allows (max) 10 concurrent requests as if there was only 1 > request > (looking at the processing time))... > > -Arne > > > __________________________________________________ > Do You Yahoo!? > Tired of spam? Yahoo! Mail has the best spam protection around > http://mail.yahoo.com >
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?8e10486b0607190801w8f6ed55kd4c601a00e5f279b>