Author Archives: mezzantrop

About mezzantrop

10 years of experience in large SAN and storage environments: mainly Hitachi, HP and Brocade. Now I am a proud SAN/storage IBMer. Empty – expect-like tool author. FreeBSD enthusiast.

The BeaST storage system with ZFS and CTL HA, latest news

Finally, I did it! The BeaST storage system with ZFS and CTL HA works in ALUA mode with zpools balanced over controllers. The BeaST Quorum automates Failover/Failback operations. Yes, I have something to say now: Read the full description on … Continue reading

Posted in Storage, BeaST, BeaST Quorum | Tagged , , , , , , , , , , | Leave a comment

Fighting with ZFS to make zpools failover/failback possible

After success with single zpool switching, I’m trying now to create a reliable and balanced construction with two controllers and two pools. When one of the controllers is dead, its pool successfully migrates to the other controller. But when the … Continue reading

Posted in BeaST | Tagged , , , , , , , , | Leave a comment

Quick MS Excel IsTime() and TypeIs() functions solution

I never thought I would write hints for MS Excel VBA, nevertheless here is the first one. It turns out, there is a scripting problem with identifying value as a time in a cell on a worksheet. I was curious … Continue reading

Posted in Tips & tricks | Tagged , , , , , , | Leave a comment

Fresh BSD Magazine with my article as a headline!

Boasting now as the fresh BSD Magazine puts my paper “Nearly Online Zpool Switching Between Two FreeBSD Machines” on top of the issue’s cover. My text is about problems of ZFS storage pool sharing between computers and solutions of overcoming these obstacles. To … Continue reading

Posted in BeaST, Storage | Tagged , , , , , | Leave a comment

Conway’s Game of Life for Excel

I always wanted to use MS Excel for a really, really useful project! You know, something like these amazing tools, which allow you to convert a picture into an array of cells on the Excel spreadsheet. So, don’t thinking much … Continue reading

Posted in Misc, My projects | Tagged , , , , , | Leave a comment

Short memo for SSL/TLS debugging and session decrypting

When trying to automate recurring or annoying operations on a network client, you must be lucky to have a special SDK, well-known documentation on API and plain-text protocols. Otherwise, it often happens that you have to start capturing tcpdump outputs … Continue reading

Posted in Tips & tricks | Tagged , , , , , , , , , | Leave a comment

There is a super nice typical problem scenario #4…

… according to the NetApp® Manageability SDK Printable Online Help, October 2016 | 215-11740_A0, page 147 exists on DataONTAP prior to 7.3/7.2.3P1 versions 🙂

Posted in IRL, Offtop | Tagged , , | Leave a comment