On Tue, 01 Jan 2008 11:57:45 -0500, "Jinshi" <[EMAIL PROTECTED]> said:
> Hello,
> 
> Currently I am using an old PC as backup server. It takes very long time 
> for BackupPC 3.0 to backup about 140GB data. Even when no file is 
> changed, it still takes more than 24 hours. I would like to know what 
> option I have to speed it up.
> 
> The backup server is P3 350MHz, 384M ram, running FreeBSD. The backup 
> drive is a USB 500GB external. 

SNIP

> There is also a 
> process "irq9: dc9 uhci0++" (what is that?) is taking 10% cpu. About 
> 20-30% CPU is idle. All network cards, hub and router are 100Mbps. The 
> Windows Vista reports network traffic only around 5-8Mbps during backup.
> 
> I want to know how I can find the bottleneck. I am not sure what is the 
> limiting step for the speed. I have a PC P4 2.4Ghz/756M ram that can 
> replace the backup server. Will that improve much? Should I use an 
> internal drive for backup? 

I would be pretty sure the bottleneck is the use of a USB drive.  The
uhc* process is the _U_SB _H_ost _C_ontroller.  On an older computer, it
is probably USB 1.1, not 2.0, so it is quite slow.

My backup machine is a P III (faster clock, though, but only 256 MB RAM)
and it runs plenty fast enough, currently with over 150G backed up.

Jon S.

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