Document: "When Good Disks go Bad ..."

[David Child_1]

What horrible timing :), I just got done replacing a failed disk about an hour ago. I didn't run into any major problems, but I was unaware of the new pvchange -a option which would have made it a tad easier.

10 - The information is technically correct?
9 - The information presented helps my understanding of LVM?
10 - I will be/have been able to use the proceedures provided?
10 - The proceedures were easy to follow?

Please give us your Thoughts:
- Would you recommend that others read this paper? Definately. Even if you are experienced you might run across something new.
- Are there any additional LVM topics for which you would like more information? I cannot think of anything at this time.

Thanks,
David

[Henk Geurts]

very complete document, you even mentioned the removal of "ghost-disks" with the pv key. good work..

10 - The information is technically correct?
9 - The information presented helps my understanding of LVM?
10 - I will be/have been able to use the proceedures provided?
9 - The proceedures were easy to follow?

Please give us your Thoughts:
- Would you recommend that others read this paper? yes, i will send the link to all HPUX-admins and engineers in my company.
- Are there any additional LVM topics for which you would like more information? none i can think of.

Thanks!

[Deoncia Grayson_1]

Please rate the following questions on a scale of 1-10
( 1 is the least and 10 is the most)
The information is technically correct? 9
The information presented helps my understanding of LVM? 9
I will be/have been able to use the proceedures provided? 9
The proceedures were easy to follow? 10

Please give us your Thoughts:
- Would you recommend that others read this paper? I probably will, very valuable information.

Are there any additional LVM topics for which you would like more information? None at the moment

[Jan van den Ende]

Hi.

Sorry, no comment as to the accuracy of the article, as it is out of my area of expertise.

And this is exactly my criticism:
the title "When Good Disks Go Bad" promises much more than the article contains.

For instance, it does not deal with HBVS sets, or MSCP, nor with any other technology which I also do not know about.

Now, if the title would have been:
"When good LVM disks go bad", that probably would have been a more direct pointer for the intended audience, and I would not have bothered.
Maybe from your perspective all disks are LVM disks, but really, the world is wider than that!

hth,

Proost.

Have one on me.

jpe

[generic_1]

I think you did a nice job with the document. You may want to consider adding san topics and commands to this. If you have multiple storage arrays tracking down disks, and failed fibercards are good to mention. Utilities like tdutil and fcms util could be handy when you have disks go offline :) which could mimic a disk failure.
Tracking down lun
Diskreplacement for wwn ect.

[Joseph Loo]

hi,

finally got a chance to review this.

- The information is technically correct?
10

- The information presented helps my understanding of LVM?
10

- I will be/have been able to use the procedures provided?
10

- The proceedures were easy to follow?
10

- Would you recommend that others read this paper? (Why or why not)
most definitely, no need to save any disk failure related KB, just have to refer to this pdf.

- Are there any additional LVM topics for which you would like more information?
u have cover about most of the aspects.

well done.

regards.

[Gavin Clarke]

- The information is technically correct?
10 - It certainly looks good to me, although I'd rather not be in a situation to have to test it.

- The information presented helps my understanding of LVM?
10 - It does, I've got it close to hand now so that I can refer to it if need be.
- I will be/have been able to use the proceedures provided?
10 - Yes, although it is only out root disks that will ever need this sort of attention now.
- The proceedures were easy to follow?
10 - Yes, they were. This is something that I'm always concerned about getting wrong. Now I have a handy reference covering pretty much all I'll ever need to know in this area.

Please give us your Thoughts:
- Would you recommend that others read this paper? (Why or why not)
Yes, although we have a SAN now so the likelihood of this sort of failure has reduced somewhat.
- Are there any additional LVM topics for which you would like more information?

I can't think of any right now.

[Florian Heigl (new acc)]

10/10/10/10 :)

found new command (pvchange -a N) - great!

I'd recommend to lvchange -s y before lvextend -m 1 :))

no more I could add, I will definitely keep the document in close range, even though everyone here is expected to do these tasks by heart :)

[Cheryl Griffin]

The paper is good. Have you considered getting it published elsewhere, such as the Knowledge Base or Knowledge Trees?

The traffic on docs.hp.com is generally not those who are troubleshooting but looking for manuals, man pages, release notes, installation notes, etc. It might be the last place people look for this type of document.

[Fabio Ettore]

Hi,

I think this white paper is very useful.
It is easy to follow.
I found particularly interesting the section 'Recognizing a failing disk' because very often it is the step most difficult. A guideline to check it I think it is great, so:

- The information is technically correct?
10

- The information presented helps my understanding of LVM?
9

- I will be/have been able to use the proceedures provided?
10

- The proceedures were easy to follow?
10


Thanks for your efforts!

Best regards,
Fabio