> -----Original Message----- > From: Les Mikesell [mailto:lesmikes...@gmail.com] > Sent: Thursday, December 23, 2010 12:10 AM > To: backuppc-users@lists.sourceforge.net > Subject: Re: [BackupPC-users] very slow backups > > On 12/22/10 11:53 PM, Chris Baker wrote: > > I had to upgrade my backup drive. I went from 2 1TB drives in a RAID 0 > > array to 2 2TB drives in a RAID 0 array. With the old drives and > > enclosure, my performance was about 4-5 MB per second. With the new > > drives, my performance is about 1.5 MB per second. This is terrible for > a > > backup of any significance. > > > > Does anyone have any suggestions on why my bandwidth has gotten slower? > > Everything else is same as before. > > > Do the 2TB drives use 4K sectors? Those need a fairly recent kernel and > special > partition alignment to avoid having to read and rewrite partially filled > sectors. > > -- > Les Mikesell
Thank you for your response. I'm not sure what sector size my hard drives use. I do know that they are Western Digital Caviar Green drives with a 64 MB buffer. They are 7200 rpm. I know that partitions over 2048 GB have to be set up differently. If there is something else I need to do, I will do it. Partition is ext3. I'm thinking a lot about the need to upgrade this system. I haven't done much of anything with it since we got it back in 2008. BackupPC was such a bear to set up that I wasn't sure that I wanted to take that plunge again. My attitude has been don't upgrade unless you must. I remember doing a kernel upgrade and losing access to a drive. I didn't try it again. ------------------------------------------------------------------------------ Learn how Oracle Real Application Clusters (RAC) One Node allows customers to consolidate database storage, standardize their database environment, and, should the need arise, upgrade to a full multi-node Oracle RAC database without downtime or disruption http://p.sf.net/sfu/oracle-sfdevnl _______________________________________________ BackupPC-users mailing list BackupPC-users@lists.sourceforge.net List: https://lists.sourceforge.net/lists/listinfo/backuppc-users Wiki: http://backuppc.wiki.sourceforge.net Project: http://backuppc.sourceforge.net/
