Comparing DWPD to TBW

TBW-DWPDA couple of specifications for SSD endurance are in common use today: Terabytes Written (TBW) and Drive Writes Per Day (DWPD).  Both are different ways to express the same thing.  It seems that one vendor will specify endurance using TBW, while another will specify DWPD.  How do you compare the two?

First, some definitions.  “Terabytes Written” is the total amount of data that can be written into an SSD before it is likely to fail.  “Drive Writes Per Day” tells how many times you can overwrite the entire capacity of the SSD every single day of its usable life without failure during the warranty period.  Since both of these are guaranteed specifications, then your drive is most likely to last a lot longer than the number given by the SSD’s maker.

To convert between the two you must know the disk’s capacity and the warranty period.  If  drive maker gives you TBW but you want to know DWPD you would approach it Continue reading “Comparing DWPD to TBW”

Webinar: Flash Best Practices

I had the opportunity to participate in a round table webinar covering the best practices for solid state storage on July 18.  The hour-long session (including Q&A) can be replayed at BrightTalk.

In this round table webinar entitled Best Practices for Solid State Storage Implementation storage analyst Tom Coughlin moderated three of us, Radoslav Danilak of Skyera, Esther Spanjer of SMART Storage Solutions, and The SSD Guy (Yours Truly) in a Continue reading “Webinar: Flash Best Practices”

Webinar: Replacing DRAM with SSDs

Objective Analysis Presents at BrightTalk Enterprise Storage SummitI will be presenting a webinar at BrightTalk’s Enterprise Storage Summit on Wednesday, June 12, to discuss how to use SSDs to reduce DRAM usage in the enterprise.

DRAM?!?  Yes!  Many experienced SSD users already take this approach, and it does a great job of cutting cost, power, and other resources while improving system response time.

The presentation is titled SSDs: Not Just About Storage.  You can view it by clicking on the title.

Join me at 11:00 Pacific Time to hear the webinar including participation in the Question & Answer session at the end.

Can’t make it?  A recording will be available shortly afterwards with the full slides, the recorded conference, and the Q&A.  The major difference is that you won’t be able to participate in the Q&A yourself.

Join me and check out the other presentations that will also be available from this event.