Category Archives: Software

I’m in Tech Field Day 22!

Posted by on December 8, 2020 1 comment

From Wednesday December 9 to Friday December 11 I’ll be a delegate in Tech Field Day 22. I attended once before, in San Jose in 2014, for Storage Field Day 5 and now, 6 years later I’m in #TFD22! Time sure flies! This week we’ll be talking to some interesting companies once again.

These are the presenting companies and the delegates that will be attending:

Wednesday Thursday Friday
Early Presenting Companies Commvault
Quantum		 Veeam
Red Hat		 VMware
Delegate Panel Arjan Timmerman, Bart Heungens, Bruno Wollmann, Jasper Bongertz, Kori Younger, Lino Telera, Max Mortillaro, Michael Davis, Ned Bellavance, Phillip Sellers, Rob Koper, Steven Cortez
Late Presenting Companies Cisco
MemVerge		 Riverbed Illumio
Delegate Panel Al Rasheed, Ben Mason, Chris Hildebrandt, Chris Maki, David Chapa, Erik Ableson, Jody Lemoine, Justin Warren, Matt Callaway, Matthew Leib, Nico Stein, Robert Novak, Scott Bollinger

 

It’s going to be an interesting few days and I’m very much looking forward to a renewed participation in this TFD event!

 

For more detailed information, please visit the TechField Day website.

How to find out the LUN id of a Windows disk

Posted by on April 27, 2018 No comments
Hard Drive

Attaching multiple LUNs to a Windows host and later trying to figure out which LUN is which can be a drag. I found out that using the “details disk” command in diskpart can help you finding backup the right LUN:

 

diskpart

list disk

select disk 19 (or whatever drive you want to see the details of)

detail disk

HITACHI DF600F  Multi-Path Disk Device
Disk ID: 00000000
Type   : FIBRE
Status : Online
Path   : 0
Target : 2
LUN ID : 7
Location Path : UNAVAILABLE
Current Read-only State : Yes
Read-only  : Yes
Boot Disk  : No
Pagefile Disk  : No
Hibernation File Disk  : No
Crashdump Disk  : No
Clustered Disk  : No

There are no volumes.

 

So in this particular case the Host LUN id was 7. This should help you along a bit 🙂

Format of CSV on Hyper-V hosts is very slow

Posted by on April 6, 2018 No comments
Hard Drive

When formatting a newly added disk (LUN) to Hyper-V, often you’ll notice the formatting takes forever. Dell EMC therefore advises to disable VAAI on VMware hosts for the same issue, however modern VMware hosts don’t seem to have this problem. Hyper-V however still have this issue. To disable the UNMAP / TRIM from happening, use the following command:

fsutil behavior set DisableDeleteNotify 1

After formatting was performed, you’ll need to re-enable UNMAP / TRIM by issuing the following command:

fsutil behavior set DisableDeleteNotify 0

 

Cisco DCNM server unresponsive

Posted by on July 17, 2017 2 comments
Cisco MDS

You’re running a DCNM virtual appliance and when you’re trying to log on, it looks like the appliance’s webserver is no longer active.

Connect to the Linux prompt of the appliance and do the following:

Stop DCNM services:

/usr/local/cisco/dcm/dcnm/bin/stopLANSANServer.sh

Open the psql prompt:

/usr/local/cisco/dcm/db/bin/psql dcmdb

log on with root password (user root is assumed)

Type the command:

VACUUM FULL ANALYZE VERBOSE;

This will produce tons of output, but just let it run and eventually it all ends and you just need to start the DCNM services again.

When done, quit the psql prompt:

dcmdb=> \q

Start DCNM services:

/usr/local/cisco/dcm/dcnm/bin/startLANSANServer.sh

Source: cisco.com

Free Dell EMC trainings

Posted by on May 23, 2017 No comments

For those that want some extra training on Unity or the VMAX All Flash for example, there’s free training available from Dell EMC Education at this moment:

This list is a summary only. For a complete list, take a look at DECN (Dell EMC Community Network) for the complete list: https://community.emc.com/docs/DOC-34286