We don't have a SAN yet. We're trying to improve backup and disaster recovery time windows so we have been testing backups to disk using the following:
Windows 2003 Server
Dell PowerEdge server 2GB RAM 2xXeon P4's
Veritas Backup Exec 9.1 (backup file size set to 1GB each)
SATA hardware RAID controller w/ 64 MB cache (write cache enabled)
6x250GB SATA 7200 RPM Drives split into 2 arrays (mirror for OS, RAID5 for backups)
Intel GB copper adapter using dedicated, offline GB switched network for backup traffic between this server and backup targets
We have not been able to push more than 27 MB/s or 1.6 GB per hour (bytes NOT bits) to the disks. We have tried running multiple concurrent backup jobs from different targets, but the speed actually goes down significantly (not what I was expecting).
I'm looking for some real-world examples where others have been able to get better performance. As much detail as you're willing to share would be appreciated.
Thanks in advance!
November 5, 2004 3:20 PM
September 25, 2008 8:16 PM