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Old 04-04-2015, 04:17 AM   #1
RHCE_ran
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Rescan SCSI bus in RHEL 5.8


We have RHEL 5.8 on a VM in our production environment which is connected to Fujitsu SAN storage. The size of the partitions on RHEL machine has to be increased. We already added a disk to the VM but this has to be visible on the RHEL machine. I am not sure with the commands to rescan, the initial step has to be:

echo "- - -" > /sys/class/scsi_host/host#/scan

Subsequently, to see the disk nomenclature, are the different options:

1) fdisk -l
tail -f /var/log/messages
2) dmesg
3) ls –ltrh /sys/block to see the new device

I am not sure of which approach to take from above 3 options or is there something else.

I hope, I have been able to explain the problem.

Requesting a reply to my query.

Regards
 
Old 04-04-2015, 09:50 AM   #2
TB0ne
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Quote:
Originally Posted by RHCE_ran View Post
We have RHEL 5.8 on a VM in our production environment which is connected to Fujitsu SAN storage. The size of the partitions on RHEL machine has to be increased. We already added a disk to the VM but this has to be visible on the RHEL machine. I am not sure with the commands to rescan, the initial step has to be:

echo "- - -" > /sys/class/scsi_host/host#/scan

Subsequently, to see the disk nomenclature, are the different options:

1) fdisk -l
tail -f /var/log/messages
2) dmesg
3) ls –ltrh /sys/block to see the new device

I am not sure of which approach to take from above 3 options or is there something else.
...and the FIRST TWO HITS in Google for "rhel how to rescan scsi bus" are...
https://access.redhat.com/solutions/3941
https://access.redhat.com/documentat...-scsi-bus.html

AGAIN, you say you're paying for RHEL support, but don't ever seem to call them, or access the customer knowledgebase online. Since you have a 'certification', it seems odd that you can't perform these basic operations, or even try to look something up. And as you've been told NUMEROUS times in the past, RHEL 5 is OLD...you need to upgrade. Since you say your company is paying, they shouldn't have a problem.
 
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Old 04-04-2015, 01:26 PM   #3
John VV
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i know the saying "RTFM" gets censored do to iffy language

but WHY do people have issues in READING THE USER MANUAL
and seem to not know how to do BASIC research


if there is a part of the VERY WELL documented redhat docs that ARE causing you issues
we can help

BUT
we will NOT do YOUR research FOR YOU
 
Old 04-06-2015, 12:10 AM   #4
RHCE_ran
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Request you not to reply with such sarcastic replies. Please do not try to influence others with your answers.You may be very knowledgeable but that does not mean that everybody has same level, I would not be asking this question if I knew it. How does RHEL certification tell about VM & SAN storage? I think I had told you we have L3 support of Red Hat which does not entitle us to asking Red Hat directly.
 
Old 04-06-2015, 01:12 PM   #5
TB0ne
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Quote:
Originally Posted by RHCE_ran View Post
Request you not to reply with such sarcastic replies. Please do not try to influence others with your answers.You may be very knowledgeable but that does not mean that everybody has same level, I would not be asking this question if I knew it.
How does your level of knowledge prevent you from trying to look it up, and doing your own research? And no one is 'influenced' by anyone answering a question; you have been asked MANY times in the past to show some of your own effort, and to try to look things up.
Quote:
How does RHEL certification tell about VM & SAN storage?
Because those things are covered in the certification exams
Quote:
I think I had told you we have L3 support of Red Hat which does not entitle us to asking Red Hat directly.
But it DOES entitle you to look in the Red Hat knowledgebase, where the answers were easily found. Why didn't you look it up?
 
Old 04-06-2015, 11:13 PM   #6
RHCE_ran
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Request you to please stop these kind of answers. Please !! I may not be able to tell you this again
 
Old 04-07-2015, 09:43 AM   #7
TB0ne
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Quote:
Originally Posted by RHCE_ran View Post
Request you to please stop these kind of answers. Please !! I may not be able to tell you this again
And I have repeatedly requested that you attempt to do some research on your own, yet you don't. You don't acknowledge the answers/solutions you received in the first reply, do you??? You don't say if you tried them or if they worked...you have only complained about things since the first reply.

If you're not going to participate in the conversation/forum, and won't acknowledge the answers you get, tell us what happened when you TRIED those solutions, or indeed even stay on topic, then why bother posting?
 
  


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