Re: HP/UX and Archives

Keith Howard (keithh@keithhpc.win.net) wrote: : Hello netters, : Does anyone have some experience with archives and the following : configuration? : HP-9000/827 : HP/UX 9.04 : DAT Drive (16 GB w/120 meter tape) : What is the blocking size and the maximum data storage on a 90M : tape and/or a 120M tape? : I am using /dev/rmt/1hc for the device which is the hardware : compression device but can't seem to get more than 2GB worth of : archive onto the tape. Am I doing something wrong or just missing : something obvious? Keith, Unfortunately, you are probably bumping up against an operating system limit. I saw the same thing on my Pyramid. Most Unixes have a 2GB file size limit. Tbtape writes all of its archive in one open() statement, making it subject to the file size limit. It's usually pretty easy to have HP make some changes that will up the limit to at least 4GB (they need to use longs rather than ints in their seek routines), but unless Informix has changed their algorithms, you probably can't get any more data on the DAT. I've seen some info to the contrarary. Is anyone getting (and restoring from) more than 4GB tapes? Joe : Keith Howard : Service Systems : Chicago, IL -- --------------------------------------------------------------------------- Joe Lumbley Dallas, Texas Hi, y'all Watch for my INFORMIX DBA Survival Guide from Prentice-Hall/Informix Press ISBN 0-13-124314-4 (12431-3) Due in bookstores October 28, 1994 orders: orders@prenhall.com (515) 284-6761 fax (515) 284-2607 ----------------------------------------------------------------------------