Re: Multiple DAT Drive Backup

Paul, We have always used compression on our HP9000. The device name of /dev/rmt/#hc has always worked well, both on backing it up and restoring it. We have always needed intervention anyway though because of our db size (42gig). We were up to 8 DAT tapes and almost a whole shift to complete a backup. Then we went to a DLT drive. The entire db fits on 1 tape and can be backed up in about 2 hours. Ain't technology great?? Dave p.s On your tape parameters you need to set the block size on the backup device at 64(according to HP tech support) and with a tape size of 8000000 (is that enough zeros??) for the DAT tape to work right. In article <904221680.12617.0.nnrp-10.9e987eaf@news.demon.co.uk>, "Paul Wheeler" <paul.wheeler@leaderflushshapland.co.uk> wrote: > We have just toppled the the 4Gbyte capacity of our HP9000 DDS2 Dat drive > during our informix Level 0 backup. (ontape -s -L 0). Subsequently the > ontape> command prompts for a second tape some 40 minutes into the backup procedure. > > We have a secondary DAT device attached to our HP9000 server which is > currently > unused. Is there a possibility of utilising both DAT drives to complete the > backup process > without the requirement of user-intervention to swap the tapes. > > Another approach we have thought of is to enable compression on our primary > DAT drive > thereby giving us a maximum 8Gbyte capacity. The issue here is that there > is no guaranteed > compression ratio and therefore the tape capacity is variable. How would > this be specified > in the tape parameters? > > Any help here would be greatly appreciated. > > Paul. > > -----== Posted via Deja News, The Leader in Internet Discussion ==----- http://www.dejanews.com/rg_mkgrp.xp Create Your Own Free Member Forum