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mount could not find any free loop device

If you like to play with lots of ISO files at the same time, you will inevitably encounter the below error while mounting the ISO files as loop devices.

root@vikas027:~# mount -a
mount: could not find any free loop device
root@vikas027:~#

I have a PXE Kickstart Server for which I need to mount numerous ISO (RHEL, OEL, Ubuntu, Debian, etc) files at the same time so that the can serve as Kickstart installation trees and yum repositories.

By default Linux (RHEL and Ubuntu at least) kernel supports 8 loop device files, i.e. one can only mount 8 ISOs at the same time.

Fortunately, we can add block device files using mknod as below to mount more ISOs. All we need to take care of is major and minor numbers.

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Hardware RAID Monitoring on Citrix XenServer 6.2.0

Recently, I had installed Citrix XenServer 6.2.0 on IBM x3650 M2 rack server and it had a LSI Logic 1068E SAS controller.

Now, I had to set up health monitoring for raid disks. Few minutes on Google lead me to mpt-status and I found my new friend. The steps are pretty simple.

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How to use Route53 to manage DNS records

In this post, I will walk you through another awesome service of AWS i.e Route 53. You might have a question popping in your mind, why it is called Route 53. It is because DNS listens on port number 53. To know more about DNS, visit this article by WebHostingGeeks.

I assume that you have your domain with you and ready to create records. I am taking an example of mys3example.com domain, replace it with the your domain. To test things out, I am using the same webpages which I had used to host a website on S3.

Login to Amazon console and click on Route 53 under Storage & Content Delivery.

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