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Re: raw device for voting disk RHEL5

From: gerryt <lepsysinc_at_gmail.com>
Date: Wed, 14 Nov 2007 09:02:41 -0800
Message-ID: <1195059761.005548.133950@v23g2000prn.googlegroups.com>


On Nov 14, 1:07 am, NetComrade <netcomradeNS..._at_bookexchange.net> wrote:
> Posting to the oracle group, b/c all the googling points to only
> Oracle folks using raw devices :)
>
> This is pretty much the problem, can't write to raw device.
> BTW, this is RHEL5, and there is no more 'chkconfig restart
> rawservice" or whatever it used to be. Need raw for Std Edition RAC
> 10gr2.

Or not - see below
> [root_at_lsbcmdbp01 ~]# /bin/raw /dev/raw/raw10 /dev/sdi1
> /dev/raw/raw10: bound to major 8, minor 129
> [root_at_lsbcmdbp01 ~]# dd if=/dev/zero of=/dev/raw/raw10 bs=512 count=20
> dd: opening `/dev/raw/raw10': Device or resource busy
> [root_at_lsbcmdbp01 ~]# dd if=/dev/zero of=/dev/sdi1 bs=512 count=20
> 20+0 records in
> 20+0 records out
> 10240 bytes (10 kB) copied, 0.00076 seconds, 13.5 MB/s
> permissions (played with)
> [root_at_lsbcmdbp01 ~]# ls -ltrh /dev/raw/raw10
> crw-rw-rw- 1 root root 162, 10 Nov 14 03:31 /dev/raw/raw10
> .......
> We run Oracle 9iR2,10gR1/2 on RH4/RH3 and Solaris 10 (Sparc)

Debateable. You DID read the docs about ownership of the slices in question right? On Solaris it is documented that the raw slices should be owned by
oracle:oinstall so I assume that's the same for Lie-GN-ux. : > FYI I saw no improvement over UFS cooked on Solaris 10 during several swingbench runs, but ASM definitely was better. Consider ASM usage instead?? Received on Wed Nov 14 2007 - 11:02:41 CST

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