When backing up or restoring to SSA disk, I usually get about a 30 second response time before data moves (LTO 3584 library & 500GB SSA disk on TSM server). Once it starts moving, I get almost a Gig a minute per tape drive (5 drives). Thank you, Jeff Caffey Enterprise Systems Programmer Pier 1 imports, Inc. - Information Services [EMAIL PROTECTED] Voice: (817) 252-6222 Fax: (817) 252-7299 -----Original Message----- From: Ray Pratts [mailto:[EMAIL PROTECTED]] Sent: Thursday, February 01, 2001 8:55 PM To: [EMAIL PROTECTED] Subject: Re: LTO PERFORMANCE with TSM I've seen these LTO test results TSM backup/restore operations with a large (256 MB) file size of data that does not benefit from compression (e.g. video, audio, and image files) Backup 12.8 MBs / second Restore 14.7 MBs / second Backup/restore operations with large files which benefit from compression Backup 15.3 MBs / second Restore 17.0 MBs / second Dan Giles wrote: > I've seen a lot of things about LTO in this group (mostly good), but I haven't > seen anything that directly relates to performance with TSM. To date, Magstars > were THE best technology for TSM (in my opinion) due to the fact that it didn't > have to back-hitch. I suspect that because LTO uses servo tracking, that this > may be the case with LTO as well. > > Also, looking through the red book, I see that the average search time to first > byte of data isn't any better than DLTs. With DLTs, I found 1 1/2 minutes wait > time to start data transfer was a bit ridiculous, especially when collocating a > large number of servers. > > Any comments on this? > > -- > Dan Giles, Tivoli Certified Consultant - TSM 3.7 > phone: (416) 402-9744 > e-mail: [EMAIL PROTECTED]
