Boris, we have the same thing here but with LTO1 and 2. We have a L80 that has 4 drives one LTO 1 and two LTO 2. We use all lto1 tapes in the robot. LTO 2 will read and write LTO 1 tapes. So I would imagine that LTO 3 can read and write LTO 2 tapes. Configure the drives as lto3 and just use LTO 2 media in the robot.
Greg ________________________________ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Boris Kraizman Sent: Tuesday, December 19, 2006 9:41 PM To: veritas-bu@mailman.eng.auburn.edu Subject: Re: [Veritas-bu] LTO3 Read/Write LTO2 Hi Folks, Just got three new LTO3 tape drives in our STK L180 and had to configure them as hcart2 for compatibility with the remote site with same library, but with LTO2 tape drives. We tested all combinations, ran backups and restores on same media with the new drives and on a small L20 liner with LTO2 drives, and worked well. So, it seems no problem and we can wait until we get LTO3 at the second site as well. Again, yes it was tricky to make NetBackup works with LTO2 tape media, we followed a white paper, that says about how to configure a new generation of tape drives and make it compatible with the older tapes. But, still if I need to do restores and reads from old tapes, do I have to keep LTO3 tape drives as hcart2? or I can make tape media hcart3 with vmchange based on the guildlines. I would like to hear, how I would use lto2 tapes with lto3 drives and keep running backups already on lto3 cartridges. It seems, maybe we will have to keep one tape drive with older type of density (hcart2) for such requests. Regards, Boris On 12/19/06, Paul Keating <[EMAIL PROTECTED]> wrote: -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Weber, Philip Sent: December 19, 2006 12:30 PM To: Wessam Aly; Dave Brown Cc: veritas-bu@mailman.eng.auburn.edu Subject: Re: [Veritas-bu] LTO3 Read/Write LTO2 I've also heard that once you've used LTO2 media in an LTO3 drive, you can't then read it in an LTO2 drive. Not sure where I got this from though. Absolutely 100% false. I was worried of the same, so I test the hell out of my LTO3 drives before putting them into prod. I've got 4x LTO2 drives, and 5x LTO3 drives in each of my two libraries, and 100% LTO2 media.....been running like that almost a year with no problems. I've also got some new LTO3 drives having asked for LTO2...so far they seem to be running slower than the LTO2s as I can't supply data to them fast enough :-(... time to play with mpx and buffer sizes... MPX and number of buffers, yeah, but buffer size should be the same (256k) for both. Get yourself some fast DSUs, VTLs, or use SAN media servers to prestage your data......pushing it over 100Meg ethernet isn't going to do you any favours. Paul ==================================================================================== La version française suit le texte anglais. ------------------------------------------------------------------------------------ This email may contain privileged and/or confidential information, and the Bank of Canada does not waive any related rights. Any distribution, use, or copying of this email or the information it contains by other than the intended recipient is unauthorized. If you received this email in error please delete it immediately from your system and notify the sender promptly by email that you have done so. ------------------------------------------------------------------------------------ Le présent courriel peut contenir de l'information privilégiée ou confidentielle. La Banque du Canada ne renonce pas aux droits qui s'y rapportent. Toute diffusion, utilisation ou copie de ce courriel ou des renseignements qu'il contient par une personne autre que le ou les destinataires désignés est interdite. Si vous recevez ce courriel par erreur, veuillez le supprimer immédiatement et envoyer sans délai à l'expéditeur un message électronique pour l'aviser que vous avez éliminé de votre ordinateur toute copie du courriel reçu. _______________________________________________ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu >>> This e-mail and any attachments are confidential, may contain legal, >>> professional or other privileged information, and are intended solely for >>> the addressee. If you are not the intended recipient, do not use the >>> information in this e-mail in any way, delete this e-mail and notify the >>> sender. CEG-IP1
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