Solved

ESX drive rebuilds

Posted on 2013-12-11
4
226 Views
Last Modified: 2016-11-23
Lets see who can confirm this am I correct is saying if you have a dell server and it has hardware RAID 5 and one drive fails you can replace the drive make it a hotspare, in the raid manager of course and reboot to finish the rebuild.  The rebuild will happen in the background corrct while VMware is running?

What min precent do I have to be at to reboot and allow to finish in the background?

I dont want to wait for it in the raid manager as i take far too long.

Thanks
0
Comment
Question by:Squidsupport
4 Comments
 
LVL 22

Expert Comment

by:Nick Rhode
ID: 39711912
It will rebuild when you swap it.  Some are much faster than others.  If you fire it up while its rebuilding you will have a performance impact and will see warning signs in the hardward status section in VMware.  You have dell servers and have you looked at installing OMSA on the server running esx or esxi.  This way you can use the remote management tools and check the status of the server through a web gui.

Example:  http://www.dell.com/support/drivers/us/en/19/driverdetails?driverid=W32PK

Refer to here for a great guide by Hanccocka:

http://www.experts-exchange.com/Software/VMWare/A_10624-HOW-TO-Use-Dell-OpenManage-Server-Administrator-to-Create-and-Manage-a-RAID-Array-on-a-Dell-PowerEdge-Server-with-VMware-vSphere-5-0-ESXi-5-0-installed.html
0
 
LVL 47

Expert Comment

by:dlethe
ID: 39711939
Actually, depending on the firmware and exact model of controller, a rebuild will not happen unless you swap the HDD hot (meaning while system is running using the same bay).  Rebooting isn't necessary or even advised in any of the Dell controllers.   Also the replacement drive must not have been part of a RAID subsystem so it has no metadata on it.
0
 
LVL 15

Expert Comment

by:achaldave
ID: 39711946
You cannot make replaced drive (which is already member of raid) hotspare unless you reconfigure raid or have existing hotspare moved to raid,  as for replacing failed drive on Raid-5, you can just hot swap the drive, no need to reboot.
0
 
LVL 119

Accepted Solution

by:
Andrew Hancock (VMware vExpert / EE MVE^2) earned 500 total points
ID: 39712067
If you have a RAID array, of type RAID 5, and a disk fails, you will need to replace the disk.

Adding a Hot Spare to the current RAID set, depends on the software on the storage controller, but the existing RAID 5 set would need to be altered to add the FOURTH Hot Spare Disk.

RAID rebuilds will re-build in the background, whilst VMs are running on the datastore, but at reduced performance, Array Rebuild Priority can be specified in some RAID BIOSes as Low, Medium or High.

Depending upon disk types, a RAID 5 rebuild could take several hours!
0

Featured Post

Enterprise Mobility and BYOD For Dummies

Like “For Dummies” books, you can read this in whatever order you choose and learn about mobility and BYOD; and how to put a competitive mobile infrastructure in place. Developed for SMBs and large enterprises alike, you will find helpful use cases, planning, and implementation.

Question has a verified solution.

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

This article will show you how to create an ISO CD-ROM/DVD-ROM image (*.iso), and MD5 checksum signature, for use with VMware vSphere Hypervisor 6.5 (ESXi 6.5). It's a good idea to compare checksums, because many installations fail because of a corr…
When rebooting a vCenters 6.0 and try to connect using vSphere Client we get this issue "Invalid URL: The hostname could not parsed." When we get this error we need to do some changes in the vCenter advanced settings to fix the issue.
Teach the user how to delpoy the vCenter Server Appliance and how to configure its network settings Deploy OVF: Open VM console and configure networking:
Teach the user how to use configure the vCenter Server storage filters Open vSphere Web Client:  Navigate to vCenter Server Advanced Settings: Add the four vCenter Server storage filters: Review the advanced settings: Modify the values of the four v…

831 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