LTO drives will "crawl" unless they are streamed. The LTO blocksize should be set as high as possible, 256KB is not to large.
If your disk and application cannot write at 15 MB/sec, the best you can expect is a few MB/sec. There is no in-between. Orville L. Lantto Datatrend Technologies, Inc. (http://www.datatrend.com) IBM Premier Business Partner 121 Cheshire Lane, Suite 700 Minnetonka, MN 55305 Email: [EMAIL PROTECTED] Lars Bebensee <[EMAIL PROTECTED]> Sent by: "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]> 08/13/02 09:24 AM Please respond to "ADSM: Dist Stor Manager" To: [EMAIL PROTECTED] cc: Subject: Tape Performance on 3580 Hi guys, this is actually not a TSM question but one for the hardware gurus. We are running a backup under AIX using the savevg command and Ultrium 3580 tape drives. With topas I can see a data transfer rate of about 1MB/sec. We attached the drives via Fibre Channel and a SAN Data Gateway. The blocksize of the drive was set to 2048 (since one of the SAN guys told me FC transfers with a blocksize of 2048). I started savevg with "-b4" meaning to write 4x512Byte blocks (=2048). With the mentioned speed the drives are seriously crawling. Am I missing out something here? Any clues?? Thanks Lars
