Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

How to boot gracefully from SAN after power failure

Posted on 2006-06-24
5
403 Views
Last Modified: 2013-11-15
I have a server that boots from an EMC AX100 storage array.  Both are connected to a UPS.  After a power failure, both the EMC and the server boots at the same time, but the server cannot boot before the SAN has finished booting.  How do I configure the server to wait until the EMC is up to start booting?

Related to the above, when the batter runs down to below a threshold, I want the EMC and the server to both shut down gracefully.  The problem is, if I shut down the EMC first, the server will crash; if I shutdown the server first, I have no way of shutting down the EMC since the server is connected to the UPS and not the EMC.  How do people do this?

Thanks.
0
Comment
Question by:MutualHedge
  • 3
5 Comments
 
LVL 30

Assisted Solution

by:ded9
ded9 earned 50 total points
ID: 16975362
0
 
LVL 30

Accepted Solution

by:
Duncan Meyers earned 200 total points
ID: 16978410
>I want the EMC and the server to both shut down gracefully
The AX100 doesn't need to be shut down gracefully. It has been designed to recover from a crash.

>How do I configure the server to wait until the EMC is up to start booting?
Theres no easy way around this. You may have the option of a long memory test on your server. Other than that, there's ot a whole lot you can do without spending up on products like this one: http://www.apc.com/products/family/index.cfm?id=70 . Its a smart Power distribution unit for racks - but it may do what you need - it allows for staged power-up, although whether the delay will be sufficient, I don't know.


0
 
LVL 30

Expert Comment

by:Duncan Meyers
ID: 16978419
On further reading on this page: http://www.apc.com/resource/include/techspec_index.cfm?base_sku=AP7900&tab=features

"Power Delays
Allows users to configure the sequence in which power is turned on or off for each outlet. This helps avoid in-rushes at start-up, which can cause overloaded circuits and dropped loads. Sequencing also allows users to predetermine which piece of equipment is turned on first so other equipment dependant on that unit will function properly." (from www.apc.com)

This looks like it may be just the ticket.
0
 

Author Comment

by:MutualHedge
ID: 16980627
Thanks for the answers.  They give me lots of ideas.  I will look into the APC staged power up product.  It's good to know the EMC can handle a power failure.

0
 
LVL 30

Expert Comment

by:Duncan Meyers
ID: 16980842
Thanks! You've just tipped me over the 300,000 point mark - which makes me a "Wizard"

W00t! :-)
0

Featured Post

The Eight Noble Truths of Backup and Recovery

How can IT departments tackle the challenges of a Big Data world? This white paper provides a roadmap to success and helps companies ensure that all their data is safe and secure, no matter if it resides on-premise with physical or virtual machines or in the cloud.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

A Bare Metal Image backup allows for the restore of an entire system to a similar or dissimilar hardware. They are highly useful for migrations and disaster recovery. Bare Metal Image backups support Full and Incremental backups. Differential backup…
Finding original email is quite difficult due to their duplicates. From this article, you will come to know why multiple duplicates of same emails appear and how to delete duplicate emails from Outlook securely and instantly while vital emails remai…
This tutorial will walk an individual through the steps necessary to enable the VMware\Hyper-V licensed feature of Backup Exec 2012. In addition, how to add a VMware server and configure a backup job. The first step is to acquire the necessary licen…
This tutorial will walk an individual through setting the global and backup job media overwrite and protection periods in Backup Exec 2012. Log onto the Backup Exec Central Administration Server. Examine the services. If all or most of them are stop…

860 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question