Bob said:
I make regular image backups of my C: drive using Seagate Discwizard running in
windows, each of which takes about 50 minutes over USB 2 to my USB backup drive.
That's to backup about 95 GB of data. IIRC, it might take 3 times that to
restore using the Bootable recovery CD made by Discwizard.
I'm not sure why your backup would take so much longer unless you have a huge
disk.
I wonder if the bootable CD version might not take advantage of DMA access to
your disk? Also, you may have the program verifying everything it writes, which
will at least double the time required. I have not found this to be necessary.
I keep images recent because they make recovery from problems SO MUCH easier and
faster, and problems are bound to happen.
When doing backups, you can split out the compression step
and do it later.
Macrium Reflect has a lightweight compressor in software. As
it prepares the .mrimg of the disk, it will do compression.
You can turn that off. With the compression turned off, I can
make a backup at around 50MB/sec. About 10 minutes is enough
to back up the 26GB C: on my Win8 install.
After my backup is finished, I can compress with 7-ZIP
(makes .mrimg.7z) . Which could take a long time. The main
disadvantage of using 7-ZIP, is I can't turn the computer off entirely.
I could hibernate or sleep it, if I wanted the computer to take a break.
But there's no ability to pause a 7-ZIP compression and pick up where
it left off later.
And this means, when doing backups, you look at all the "plumbing"
in the path, and try to arrange the various stages (initial copy,
compression, copy of final file to final destination) as best
you can.
On the later OSes, it's possible for background "maintenance" tasks,
to hijack what you're doing and slow it down. WinXP doesn't
tend to do this. On WinXP, you could turn off your AV during the
backup, but I don't know if the AV would actually bother scanning
block level access of a VSS based backup or not. Whereas on
Windows 8, the "tiworker" process will likely start reading
entire packages off the disk, which conflicts with other
activities on the machine. And some maintenance tasks on
Win8 are "very persistent". They won't take no for an answer.
For example, the Search Indexer, even when you tell it to
pause, you can catch it occasionally stealing cycles. If
you're a Win8 owner, you really have to keep Task Manager
open all the time, to find out where your performance is
going. If you have a computer with 16 cores and an SSD
drive for C:, then probably none of this matters.
Paul