This is likely not a tape issue. 52GB/hr is about 14.8MB/sec. I am betting your disk cannot read the data any faster than that. Unless the data is not compressable at all the typical rates for a SCSI Magstar drive are 25+MB/sec and can get as high as 34 on Ultra SCSI if the cables are real short. Fibre Channel easily gets 33. What kind of disk is the source?
Paul D. Seay, Jr. Technical Specialist Naptheon, INC 757-688-8180 -----Original Message----- From: Gianluca Perilli [mailto:[EMAIL PROTECTED]] Sent: Thursday, May 30, 2002 1:02 PM To: [EMAIL PROTECTED] Subject: Re: BACKUP to TAPE, PERFORMANCE HI Francisco, as far as I know the maximun native throughput of a 3590 drive is 12 MB/s. If you want something to refer to as a rule of thumb,these are the performance of the 3590 library: (Embedded image moved to file: pic19254.pcx) so you can check if you are having good performance in your environment. For more information about 3590 tape performances you can refer to this whitepaper: http://www.storage.ibm.com/hardsoft/tape/3590/prod_data/3590wp6.pdf Cordiali saluti / Best regards Gianluca Perilli Gianluca Perilli Tivoli Customer Support Via Sciangai n� 53 - 00144 Roma (Italy) Tel. 06/5966 - 4581 Cell. 335/7840985 Francisco Molero <[EMAIL PROTECTED] To: [EMAIL PROTECTED] M> cc: Sent by: "ADSM: Subject: BACKUP to TAPE, PERFORMANCE Dist Stor Manager" <[EMAIL PROTECTED] .EDU> 05/29/2002 12:00 PM Please respond to "ADSM: Dist Stor Manager" Hi everybody, My question is simple. We are running selective backup through Gigabit, and my STGpool is 3590 Tape Pool. I want to know, how many Gigabytes you backup per hour?? For bigger files I get a 52 GByte/hour. And I think these is very slow. This test is only 1 client and no other clients are accessing to Server. Any Ideas ???? Thanks, Fran. _______________________________________________________________ Copa del Mundo de la FIFA 2002 Disfruta en vmdeo de los mejores momentos desde tu ordenador. http://fifaworldcup.yahoo.com/fc/es/
