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Vol. 6 No. 8 October 2007

Best Practices: Finding the logic in volume managers

Forget what you might have heard about host-based volume managers. Here are seven reasons why they deserve some respect. Host-based volume managers (also known as logical volume managers or LVMs) are the most underrated or underutilized components in storage ecosystems, even though they've been around almost as long as open systems. Perhaps because they're host based or often managed by sys admins, many storage administrators don't consider LVMs part of their toolset. I'll set the record straight regarding LVMs and, hopefully, encourage storage administrators to use them to improve the performance of their storage environment. MYTH 1: LVMs aren't required for good performance or balance. Technically, volume managers aren't necessary for hosts such as Fibre Channel, iSCSI, parallel SCSI, JBOD or hardware RAID to access storage. To some extent, storage (hardware) vendors have made matters worse by creating a general dislike for the use of any host-based utilities that duplicate functions in their arrays, primarily RAID. However, ...

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Features in this issue

  • Storage still lacks energy metrics

  • Top 10 tips of the summer of 2006

    by Staff

    Storage, security and open source were the front runners in our tally of the Top 10 SMB tips for the summer of 2006.

  • How useful are storage benchmarks?

    Most storage vendors like to tout how well their gear performed on benchmark tests, but the results may not always be as they first appear. The benchmarking process can be easily manipulated because of the large number of variables that influence performance results. To level the playing field, test results need to be categorized by product type, configuration standards need to be defined for each category and vendors must strictly adhere to the configurations.

Columns in this issue

  • Storage Bin: Leaving you in good hands

    It's time for a changing of the guard for the Storage Bin column. Steve Duplessie, whose witty and perceptive insights have graced Storage magazine from day one, is stepping aside to make room for ESG's Tony Asaro to take up residency on our end page.