Author Archive For: Janusz Bak

Iometer

Random vs. Sequential explained.

Very often, storage product users do not know what kind of performance numbers to expect in real operations. Why do storage vendors claim such great performance when measured by an ...

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Storage server

144TB of raw storage in 4U

Last week I visited WHD2011 (World Hosting Day) in Rust, Germany. As usual there was plenty of interesting news and lots of ideas on how computing is going to develop ...

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Hardware image

Just how important is write cache?

Recently saw the following problem from a customer: They are using Acronis Backup to store their backup on a server powered by DSS V6. From time to time the backup ...

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It is impossible to delete this file!

This short story is about how important backing up your data is and how sometimes incidents that people have with regards to data loss or having a second copy of ...

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Open-E logo

Ping-Node – explained.

We wanted to provide you an in-depth explanation of the Ping-Node offering clarifications on its function and usage. Incorrect Ping-Node configuration and functionality can cause problems with HA clusters. The ...

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Open-E logo

What you can expect from SSD?

Hard disk performance is limited by mechanical parts velocity and there is no solution for this issue. Servers are using RAID for redundancy and for performance. Thanks to RAID technology ...

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A Few practical tips about IOmeter

There are plenty of benchmarking tools available but storage professionals mostly use IOmeter. Unfortunately IOmeter is a little tricky to use. You really need to read the user manual first. ...

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Fibre Channel

Enterprise Grade Fibre Chanel SAN in 5 Minutes?

I am not kidding. We were getting queries about the performance of our latest DSS V6 build 4786. So I needed to quickly set up a performance benchmark. It took ...

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Solution: HA Cluster with VMware ESX 4 and DSS V6

Is it possible to configure 10Gb switchless High Available Cluster?

Business continuity is becoming a more and more important feature. A significant portion of the purchases of our Data Storage Software are in pairs. Customers are using pairs of 2 ...

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RAID 5

How does RAID 5 work? The Shortest and Easiest explanation ever!

We all have limited time to study long and complicated information about RAID theories, but you may be interested as to how RAID 5 works. We made it simple for ...

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