I’ve been an AIX administrator since the MicroChannel days — my first AIX was version 3 — and I’m not expecting AIX to vanish any time soon, but lately I’m hearing a lot about Linux, and it’s looking more and more like my AIX skill set is going to need to be extended to include Linux skills, too. In this post I’m going to address five questions that seem to me likely to arise during this process.
Read morePermanent data storage normally uses HDD technology originally developed by IBM in the mid 1950s. Today, HDDs are typically aggregated into arrays in storage appliances using various methods to provide redundancy in case of the failure of any single HDD. In this case, the array, or a portion of the storage space in the array, will be presented to a client OS as a logical unit (LUN). This is not yet logical volume management (LVM), however, the LUN still appears to the OS as a single, large-capacity storage device. For LVM purposes, there is no functional difference between a local HDD and a LUN, so we will simply call either type of storage a disk.
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