I usually strive to verify by direct observation or independent reliable source, performance figures and other dubious claims made by any manufacturer. In this case, I was pleasantly reassured that the claim is justified based on my personal observation.
Neil Strand -----Original Message----- From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf Of Richard Sims Sent: Friday, September 14, 2007 11:06 AM To: [email protected] Subject: Re: [ADSM-L] LTO4 and encryption questions On Sep 14, 2007, at 10:44 AM, Strand, Neil B. wrote: > I have observed almost no performance degradition using encryption. The TS1120 redbook agrees: "Enabling encryption incurs a less than 1% performance impact." where the added time is to get the keys at load time. But I think that's in ongoing operation. From a reseller presentation, their knowledgeable technician cited a 25 second extra time when the tape is re-used as scratch (written from load point), in that it has to write encryption information at the front AND position about 1/3 of the way into the tape to additionally write the same information there, as insurance in case the leading portion of the tape is mangled in one of the drive problems we know so well. Richard Sims http://people.bu.edu/rbs/ADSM.QuickFacts IMPORTANT: E-mail sent through the Internet is not secure. Legg Mason therefore recommends that you do not send any confidential or sensitive information to us via electronic mail, including social security numbers, account numbers, or personal identification numbers. Delivery, and or timely delivery of Internet mail is not guaranteed. Legg Mason therefore recommends that you do not send time sensitive or action-oriented messages to us via electronic mail. This message is intended for the addressee only and may contain privileged or confidential information. Unless you are the intended recipient, you may not use, copy or disclose to anyone any information contained in this message. If you have received this message in error, please notify the author by replying to this message and then kindly delete the message. Thank you.
