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List:       evms-devel
Subject:    Re: [Evms-devel] BBR & RAID
From:       Mike Tran <mhtran () us ! ibm ! com>
Date:       2004-02-25 0:01:16
Message-ID: 1077667275.3336.23.camel () star2 ! austin ! ibm ! com
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On Tue, 2004-02-24 at 15:40, Jan Vittrup Hansen wrote:
> Hi All,
> 
>  I tried the manual, googling & looking through the archives, but
> haven't been able to come up with an understanding of how to properly
> combine EVMS, BBR & RAID - hope you guys can help me out.
> 
> I'm quite new to this, so please excuse me if I mess up the concepts
> below. I've configure three 120GB drives via the GUI as:
> 
> /dev/evms/myDisk [Ext2/3]
> (-) bbr [BBR]
>     (-) md/md0 [MDraid5RegMgr]
>          (-)hde_bbr [BBRseg] 
>              hde [LocalDskMgr]
>          (-)hdh_bbr [BBRseg] 
>              hdh [LocalDskMgr]
>          (-)hdg_bbr [BBRseg] 
>              hdg [LocalDskMgr]
> 
> i.e. A BBR segment has been added to each disk, a RAID set constructed
> and a BBR feature object added to the RAID. Finally when I saved my
> changes the GUI asked (a.o.) whether I wanted to check the disks for R/W
> errors, and I said yes. 
> 
> It seems to me that I may have added a little too much BBR functionality
> -  the disks have now been formatting for roughly 24 hours and seem
> about to melt.
> 
>  a) Should I not have added the BBR feature object - i.e. is just the
> BBR segment stuff enough?

I would remove the BBR feature object.

> 
>  b) Is running BadBlocks on a BBR manages drive not redundant at the
> best? I mean, this should be taken care of by the layer, right?
> 

You may find the following document helpful:
(BBR Segment section) http://evms.sourceforge.net/users_guide/#id2870685
(EVMS User Guide) http://evms.sourceforge.net/users_guide/

Regards,
Mike T.



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