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Re: [BackupPC-users] Advantages of internal over external hard drive?
2009-09-02 16:49:24
On Wed, Sep 2, 2009 at 11:44 AM, Les Mikesell <lesmikesell AT gmail DOT com> wrote:
Mark Phillips wrote:
> I am setting up a new backuppc server. Are there any advantages to using
> an external drive (USB or eSATA) over an internal drive to store the
> backups? The server is an older Pentium 3 500 MHz box running Debian
> Linux. I plan on using ssh/rsync to do the backups for other Linux
> boxes, a Windows box, and a Mac.
USB is considerably slower than SATA/eSATA even with the same drive on
the other end of the adapter - and the motherboard USB ports on a P3 box
are likely to be 1.x which is too slow. Otherwise the tradeoffs are
fairly obvious. The power connection can be fragile on external drives
if you move them around much. Also, you might want to consider some
sort of RAID mirroring. My favorite is a 3-member RAID1 where 2 drives
are internal and the third is a set of external drives that are
periodically added long enough to sync, then rotated offsite.
Just an FYI if you havent been on the lists long or are new. Backuppc is primarily bound by IO. A USB devices may say it has the bandwidth to do the job but USB delivers very slow IO performance compared to a hard disk. eSata is ideal for external drives but make sure the controller you buy can hot-swap (since you are on a p3 500 there was no Sata interface in that era)
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