David Logue

The Low Down on Recovering Deleted Files

d_logue2012

by David Logue Recently, I’ve received several questions related to the recovery of deleted files.  What happens when a file is deleted on a Windows-based system, and what causes those files to be lost and therefore unrecoverable?  Further, what could I have done to prevent their loss?  To answer those questions, we first need to…

RAID vs Drive Rebuilds – Part 2

d_logue2012

by David Logue This is a follow up to the original article on RAID vs. Drive Rebuilds. Several questions came up since the original posting, and Part 2 will attempt to address those questions. One of our readers noted:  “In your first example, parity is missing from stripe 4. You didn’t mention how that stripe…

VMware and NFS – Disconnected, Lost and Saved?

d_logue2012

by Dave Logue Recently VMware® and NetApp® identified an issue that affects multiple customers.  Customers running ESX 5 can experience issues with NetApp NFS data volumes under high load.  Vaughn Stewart detailed the “naughty” behavior and the proposed resolutions from NetApp and VMware in his blog at http://virtualstorageguy.com/.  Specifically he noted: A NFS datastore disconnect…

RAID vs. Drive Rebuilds

d_logue2012

by Dave Logue What happens when a RAID rebuild goes wrong and what can be done to prevent that from happening to you?  To answer the question, you need to understand how data is written to a RAID array and what happens when a drive fails and a rebuild is started.  I am going to…

Minimizing the Risks of Data Loss

d_logue2012

by David Logue Esq. This post is a continuation of the series on Solid State Drives (SSDs) and their role in enterprise storage.  In the first post, I discussed the differences between traditional HDDs and SSDs.  In the second post, I looked at the challenges associated with data destruction and asset disposal.  In this post,…

SSD vs. HDD – Data Destruction and Asset Disposal

d_logue2012

by David Logue This post is a continuation of the series on Solid State Drives (SSDs) and their role in enterprise storage as it relates to SSD and HDD data destruction and asset disposal.  The first blog addressed the differences between SSD and HDD in the area of data loss and data recovery.  You can…

SSD vs. HDD – The Missing Considerations

d_logue2012

by Dave Logue Recently there has been a lot written about Solid State Drives (SSDs) and their role in enterprise storage.  These articles include several comparisons of solid state drives and mechanical drives in RAID arrays for enterprise applications. While most of these articles address several very key areas of comparison (cost, performance, capacity, power,…