On Thu, Jun 3, 2010 at 3:20 AM, Allen <[email protected]> wrote: > Behind or ahead? If it's the one in policies on the disk drive setup then > yes it should be disabled with VFP > Al
Battery-backed-up RAID controllers have the ability to write their cache out to disk in the event of a motherboard shutdown, and so can cache writes to disk (write-behind) while consistently returning read requests. That's likely what the tech is thinking of. These are high-end units, not the Mom & Pop office server or the embedded RAID-on-chip hardware. Write-behind as implemented in MS disk drivers are notoriously buggy. Apps like VFP that intensively read and write to disk can get inconsistent results while waiting for data to be written to disk, and hence the write-ahead feature of the disk driver should be turned off. As a general rule, if the caching is implemented in software, you want to disable it. If it's build into the controller boards of the device, it's usually smarter than Windows. -- Ted Roche Ted Roche & Associates, LLC http://www.tedroche.com _______________________________________________ Post Messages to: [email protected] Subscription Maintenance: http://leafe.com/mailman/listinfo/profox OT-free version of this list: http://leafe.com/mailman/listinfo/profoxtech Searchable Archive: http://leafe.com/archives/search/profox This message: http://leafe.com/archives/byMID/profox/[email protected] ** All postings, unless explicitly stated otherwise, are the opinions of the author, and do not constitute legal or medical advice. This statement is added to the messages for those lawyers who are too stupid to see the obvious.
