Yellow Bricks

by Duncan Epping

BC-DR

VCB: I forgot all about “automount disable” what now?

· ·

Before installing VCB and connecting the proxy host to the SAN you should disable automount via diskpart(cmd, diskpart, automount disable, automount scrub). When you don’t disable automount Windows will signature all “incoming” disks. When this happens the VMware hosts will not recognize the VMFS volumes anymore. But fortunately you can re-label the luns as VMFS.

Check with “fdisk -lu” what the current ID value is of the volumes, it’s “SFS” if Windows wrecked it. Write all the devices down and label them again as VMFS:
fdisk /dev/sd? (? the letter for that specific volume)

p
d
n
p
1
default
t
fb
X
b
1
128 (disk alignment, check your SAN manual for the correct value, 128 is correct in most cases…)
W

Now rescan the HBA devices, esxcfg-rescan vmhba0 etc etc.

Undocumented VCB config.js feature

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One of my customers wanted to use the default VCB framework but did not want to quiesce the VM for several reasons. (Databases, Active Directory etc.) I could not find an option in the config.js file but noticed the following in the file glue.js:

// A fallback to be able to switch to non-quiesced snapshots
if (typeof(NO_QUIESCE) != "undefined") {
cmd +="-Q 0 ";
}

In other words, setting the option “NO_QUIESCE” with no value in config.js results in the VM not being quiesced, default it will quiesce the VM! I added the following line to the  config.js file to accomplish this:

NO_QUIESCE="";

VCB – Weird errors

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Today I encountered a weird error during an implementation of VMware Consolidated Backup. When ever I ran vcbmounter I received the following error:”Run time error – the application the application has requested the Runtime to terminate in an unusual way.”

It seemed that for some reason the vcbuser did not have the role “VMware consolidated backup user” linked anymore. I would have expected an error in the line of “permission denied” or “not enough permissions to complete task” and definitely not a Runtime error…

Anyway I tested the script I blogged about yesterday and it works like a charm, check it out!

VCB – Backup all running VMs

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Today I was busy trying to find out a way to schedule VCB backups with Commvault with just 1 schedule without having to rewrite your script every time someone creates a VM. The standard procedure is to create a subclient for every VM which is very human error prone. I stumbled upon a blog on RTFM about backing up all running VM’s, the actual script was done by Andrew Neilson, thanks! [Read more…] about VCB – Backup all running VMs

New VCB features

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When exploring VCB 1.1 I noticed some new features. One of the most prominent is the option to run VCB from within a VM. I can hear most of you think what’s the point of that and how about that HBA / iSCSI connection you need. Well if it’s of any use I will leave in the middle because I don’t see any reason for virtualizing VCB for larger environments. But for small environments, which don’t have shared storage this can be an easy way to dump their data without resorting to unsupported scripts. VCB is easily setup via the executable, next next finish. [Read more…] about New VCB features