According to the 3ware CLI, the cache is enabled. --John
John Pettitt wrote: > Have you checked that the 3ware actually has cache enabled - it has a > habit of disabling it if the battery backup is bad or missing and it > will make a *huge* difference .... > > John > > John T. Yocum wrote: >> I'm seeing terrible backup performance on my backup servers, the speed >> has slowly degraded over time. Although, I have never seen speeds >> higher than 1MB/s. (We have it set to do no more than 2 backups at a >> time.) >> >> Here is our setup: >> >> Our network is all 100Mb between servers, and switches, and 1Gb >> between switches. So, there is enough network capacity for decent >> performance. >> >> The servers being backed up, all have either RAID1 or RAID5 arrays >> consisting of 15K RPM SCSI drives. All RAID is done in hardware. >> >> The backup servers are using 7200RPM SATA drives, connected to 3ware >> 8500 or 9000 series controllers. Two the backup servers are using >> RAID1, and the other is using RAID5. >> >> Our backup servers are running CentOS 4.4, with ext3fs for the backup >> partition. I have noatime enabled, and data=writeback set to hopefully >> improve performance. >> >> On our backup servers, they are all showing a very high wait during >> backups. Here's a screenshot from one of them >> http://www.publicmx.com/fh/backup2.jpg. At the time it was doing two >> backups, and a nightly. >> >> Any advice on improving performance, would be much appreciated. >> >> Thank you, >> John >> >> ------------------------------------------------------------------------- >> Take Surveys. Earn Cash. Influence the Future of IT >> Join SourceForge.net's Techsay panel and you'll get the chance to >> share your >> opinions on IT & business topics through brief surveys-and earn cash >> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV >> _______________________________________________ >> BackupPC-users mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/backuppc-users >> http://backuppc.sourceforge.net/ >> >> > ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ BackupPC-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/backuppc-users http://backuppc.sourceforge.net/
