The ramblings of a computer geek
The Path Selection Policy is set for devices to determine how the ESXi host will utilise the paths to the storage, for example, you can have “Fixed” or “Round Robin” or “Most Recently Used”, you can also have storage vendor provided ones such as “NIMBLE_PSP_DIRECTED”. The scripts and commands I’ve found keep mentioning “Multipathing”, if … Read more
We had a very odd situation occur on one of our VMware ESXi 7.0.3 clusters (VMware ESXi, 7.0.3, 20328353), which is using iSCSI with HPE Nimble Storage. Some new storage was presented to the hosts via iSCSI. The first host was scanned, the datastore prepared as normal. Once complete, then started to perform a re-scan … Read more
Sometimes it is helpful just to get a script running on a machine to generate some disk IO load. I use this for two main reasons, one is during the testing or proving of a storage platform in terms of its availability during a fail-over or maintenance situation (e.g. it’s storage processors), the other is … Read more
Hashicorp’s Terraform is an Infrastructure as Code (IaC) declarative language that allows you to define the existence and state of objects within your infrastructure and then publish this new state to your infrastructure. Terraform is agnostic of platform, you can use a wide range of “providers” to manage a number of different infrastructure components from … Read more
IT Security continues to be a very important topic in the IT ecosystem, ensuring your Information Security is as good as it can be also makes good business sense, through the reduction of risk of loss and showing commitment to your customers of your organisation’s quality and capability. Information Security doesn’t just come from technical … Read more
I’ve recently had a problem on some new servers where a BIOS Admin Password had been set by accident, HPE provide this as a solution on their forums: https://community.hpe.com/t5/proliant-servers-ml-dl-sl/how-do-i-disable-the-bios-admin-password-on-a-gen10-dl360/m-p/7166755#M178013 However the Gen10Plus (+) servers appear to be a bit different, upon entering the forward slash “/” on the end of the password to remove it, … Read more
I had a host that was showing devices with no datastore, saying “Not Consumed”. This is what you’d expect to see for a device where the device has yet to be formatted with VMFS. Now in this case it definitely had a VMFS filesystem created. The fix for this was fairly simple. Essentially the host … Read more
If you want to check the (MD5/SHA) hash of a file you can do this on Microsoft Windows with “Get-FileHash” within PowerShell. Here is a simple script to take a File, the Hash Algorithm Type and Expected Hash for the file to compare, it hashes the file and then compares it with the expected hash … Read more
If you need to perform a packet capture you can use the following below to get this exported to a PCAP file you can then open in WireShark. You can then TFTP off the file with the following: I normally use TFTP32/64 on the machine to which i’m TFTPing, but this has had problems recently. … Read more
A long running issue, which I covered in my previous posts: https://geekmungus.co.uk/?p=3532 and https://geekmungus.co.uk/?p=3593, this should be taken as the current status of the problem and the resolution. Issue Following the patch: KB5021131 CVE-2022-37966, which was released November 8th 2022 we’ve continued to have some issues with Kerberos authentication to servers (devices) that use (and … Read more