mixing RAID in asvfs?

From: Markus Varpula <unix_at_ellos.se>
Date: Wed, 27 Jun 2001 17:13:34 +0200

Hi managers!

As a newbie one does things and hope they work.. But one dosn't know how
well they work

I added more disk to an advfs domain (in a RA8000 rack)
The domain used to be 12 18.2 GB disks setup as RAID0+1
I added 2 disks (36 GB) to the array and made a virtual device (RAID1)
out of these and added that volume to the advfs domain:

showfdmn -k analys_domain

               Id Date Created LogPgs Version Domain Name
381418b1.000d3980 Mon Oct 25 09:45:37 1999 512 3 analys_domain

   Vol 1K-Blks Free % Used Cmode Rblks Wblks Vol Name
   1L 106669160 25636384 76% on 256 256 /dev/disk/dsk4c
   2 35557304 24468384 31% on 256 256 /dev/disk/dsk6c
      ---------- ---------- ------
       142226464 50104768 65%

How will this affect performance? (Nobady has complained yet...). I know
the bigger SBB's are a lot faster so maybe that compensates the lack of
striping?

(The filedomain is heavily used by an oracle-db and a sas-system)

/markus
Received on Wed Jun 27 2001 - 15:14:23 NZST

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