Raw Devices

Linux and Unix-Like Red Hat
1

Can you please modify my script. This script is not working

for i in /dev/sdf[0-9]
       do
                /bin/raw /dev/raw/`/bin/basename ${i}` ${i}
                /bin/sleep 2
                /bin/chown orasm:ordba /dev/raw/`/bin/basename ${i}`
                /bin/chmod 660 /dev/raw/`/bin/basename ${i}`
      done
2

When you say 'not working' what symptoms do you have?

What OS are you running? The needs of each flavour and version can be different.

Robin

3

I'm running this on Virtual RHEL 6.4 server. We are trying to create raw devices from a VMDK file to install Oracle ASM . I have made partitions on /dev/sdb ad trying to run this script.

[root@testvm init.d]# bash -x raw1
+ for i in '/dev/sdb[0-9]'
++ /bin/basename /dev/sdb1
+ /bin/raw /dev/raw/sdb1 /dev/sdb1
Usage:
  /bin/raw /dev/raw/rawN <major> <minor>
  /bin/raw /dev/raw/rawN /dev/<blockdev>
  /bin/raw -q /dev/raw/rawN
  /bin/raw -qa
+ sleep 2
++ /bin/basename /dev/sdb1
+ /bin/chown oraasm:oradba /dev/raw/sdb1
/bin/chown: cannot access `/dev/raw/sdb1': No such file or directory
++ /bin/basename /dev/sdb1
+ /bin/chmod 660 /dev/raw/sdb1
/bin/chmod: cannot access `/dev/raw/sdb1': No such file or directory
+ for i in '/dev/sdb[0-9]'
++ /bin/basename /dev/sdb2
+ /bin/raw /dev/raw/sdb2 /dev/sdb2
Usage:
  /bin/raw /dev/raw/rawN <major> <minor>
  /bin/raw /dev/raw/rawN /dev/<blockdev>
  /bin/raw -q /dev/raw/rawN
  /bin/raw -qa
+ sleep 2
++ /bin/basename /dev/sdb2
+ /bin/chown oraasm:oradba /dev/raw/sdb2
/bin/chown: cannot access `/dev/raw/sdb2': No such file or directory
++ /bin/basename /dev/sdb2
+ /bin/chmod 660 /dev/raw/sdb2
/bin/chmod: cannot access `/dev/raw/sdb2': No such file or directory
[root@testvm init.d]#
4

It's telling you what you're doing wrong:

+ /bin/raw /dev/raw/sdb1 /dev/sdb1
Usage:
  /bin/raw /dev/raw/rawN <major> <minor>
  /bin/raw /dev/raw/rawN /dev/<blockdev>
  /bin/raw -q /dev/raw/rawN
  /bin/raw -qa

You don't get a /dev/raw/sdb, you get /dev/raw/raw0, /dev/raw/raw1, etc, etc. (This is assuming you have /dev/raw at all.)

You might be able to get away with stripping the 'sdb' out of the filename to use /dev/raw/raw1 for /dev/sdb1, /dev/raw/raw2 for /dev/sdb2, etc, etc, assuming you aren't already using those raw devices for anything.

5

Thank you for your reply .I need to use the same script for all the servers which i build, My script should recognize the partitions and run the commands.

6

Well, do any of your other servers use raw devices for anything?

7

Nope, We are only using this for Oracle ASM.

8

Well, you could try what I suggested, stripping out everything but the partition number to associate it with the corresponding raw number.

9

Thank you, Appreciate your help .

10

Note that you should not use raw devices with Oracle ASM
(raw devices are desupported since Oracle 11.2 - see Announcement on using Raw devices with release 11.2 (Doc ID 754305.1)
and Raw Devices and Oracle - 20 Common Questions and Answers (Doc ID 37914.1)).

You just need shared disks with a single partition, see Configuring Storage for Oracle Automatic Storage Management.

1 Like