We help IT Professionals succeed at work.

We've partnered with Certified Experts, Carl Webster and Richard Faulkner, to bring you two Citrix podcasts. Learn about 2020 trends and get answers to your biggest Citrix questions!Listen Now

x

Disk mirroring/duplexing

denmark
denmark asked
on
Medium Priority
397 Views
Last Modified: 2013-12-16
I would appreciate any "how to" advice on setting up disk
mirroring and duplexing to achieve RAID Levels 1 OR 2 in the
Solaris and sunOS environment.
Thanks in advance for your expert advice.

Denmark
Comment
Watch Question

Commented:
You need a software, which is called Solstice DiskSuite (for Solaris). There is something equivalent for SunOS (I will supply you with the name later in a comment).

As far as the Solaris S/W is concerned it is not a big deal to setup a mirror. There is even a graphical user interface for it, called MetaTool. Another possibility is manually modify a config file (usually /etc/opt/SUNWmd/md.tab). By the way, "md" stands for metadisk. Here is an example to mirror /usr :

/dev/md/dsk/d12 1 1     /dev/dsk/c0t0d0s6
/dev/md/dsk/d2  -m      /dev/md/dsk/d12
/dev/md/dsk/d22 1 1     /dev/dsk/c0t1d0s6

This creates a partition /dev/md/dsk/d2, consisting of two submirrors (d12 and d22) from the s6 slots of two different disks.

There must be an entry in /etc/vstab to mount /dev/md/dsk/d2 to /usr.

There are also some command essential command lines to make this work.

I have followed the recipe in the manual and had no probs. Also / and the swap partition are mirror on my server in a similar way. For those system partition I  have created the entries by hand. FOr the configuration of striped and mirrored user or data partions I used the rather comfortable metatool application.

I think I will not go into more detail as long as I don't know whether you ever get that software.

RAID level 2 is not supported in the mentioned S/W. However there is striping and RAID level 5.

Hope this info is helpful for you, let me know if you have further questions,

Peter (pxh@mpe-garching.mpg.de)

Not the solution you were looking for? Getting a personalized solution is easy.

Ask the Experts
Access more of Experts Exchange with a free account
Thanks for using Experts Exchange.

Create a free account to continue.

Limited access with a free account allows you to:

  • View three pieces of content (articles, solutions, posts, and videos)
  • Ask the experts questions (counted toward content limit)
  • Customize your dashboard and profile

*This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

OR

Please enter a first name

Please enter a last name

8+ characters (letters, numbers, and a symbol)

By clicking, you agree to the Terms of Use and Privacy Policy.