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-   -   SuperDuper, SuperSlow! ?? (http://www.shirt-pocket.com/forums/showthread.php?t=3241)

supermonkey 12-01-2007 03:13 PM

SuperDuper, SuperSlow! ??
 
I just downloaded SuperDuper today to backup my 120GB MBP hard drive to my new Maxtor One Touch 4 USB 2.0 external drive. I did some test last night transferring single files to the external drive, and I get about transfer rate of 18.18 MB/sec.

Here is how I am backing up with SuperDuper.

1. I followed the "How to backup to an Image" FAQ on the forum. I created a encrypted, sparse image the size of my MBP hard drive, 120GB.

2. I then chose the full backup feature on SuperDuper.

Its not even 50% done, and its been going for 2:29:51.

Any ideas what may be causing this slow down?

dnanian 12-01-2007 03:23 PM

Are you sure that your Maxtor is formatted as something other than FAT32?

supermonkey 12-01-2007 04:12 PM

Quote:

Originally Posted by dnanian (Post 15845)
Are you sure that your Maxtor is formatted as something other than FAT32?

Yep. The Mac partition is formatted as Mac Extended (Journaled).

supermonkey 12-01-2007 05:01 PM

UPDATE:

FInaly finished the backp.

Here is the log

603,332 files evaulated. 593,396 files copied. Effective copy speed 5.07MB/s.

Elapsed Time: 4:12:27


The resulting image is now 72.8 GB

At 15,147 seconds, thats about 4.8MB/s on average.

Shouldnt it be at least 2-3 times faster ?

dnanian 12-01-2007 05:46 PM

No, actually, that seems about right. I'd expect about 6MB/s directly to a USB drive, less to an image.

supermonkey 12-01-2007 07:28 PM

Quote:

Originally Posted by dnanian (Post 15849)
No, actually, that seems about right. I'd expect about 6MB/s directly to a USB drive, less to an image.

Really? When I copy files over manually I get about 18MB/sec. Why is it slower for SuperDuper?

dnanian 12-01-2007 07:31 PM

We're copying a lot of tiny files and their associated metadata, folder info, etc. Lots of bidirectional stuff.

supermonkey 12-01-2007 09:32 PM

Quote:

Originally Posted by dnanian (Post 15851)
We're copying a lot of tiny files and their associated metadata, folder info, etc. Lots of bidirectional stuff.

Interesting. If I buy the full version and use the Smart Backup, how long does it typically take to evaluate what has changed on a drive?

dnanian 12-01-2007 09:38 PM

It's really pretty fast -- probably 7-12 minutes on most normal volumes. The last copy I made of my 1.9M file startup volume took about 24 minutes, including copying a few GB of files.

t3rockhall 12-01-2007 11:07 PM

My 80 (67.4 capacity, 38 used, 30 remaining) gig smart backup usually takes about 7 - 8 minutes. A full erase and replace takes a bit over an hour. Firewire here. (Why does an 80g drive have only 67 capacity, anyway??)

dnanian 12-01-2007 11:17 PM

It shouldn't -- 80GB is likely 80000 x 1000 bytes in "diskspeak", as opposed to 80000x1024 in "bytespeak".

supermonkey 12-01-2007 11:29 PM

Quote:

Originally Posted by t3rockhall (Post 15861)
My 80 (67.4 capacity, 38 used, 30 remaining) gig smart backup usually takes about 7 - 8 minutes. A full erase and replace takes a bit over an hour. Firewire here. (Why does an 80g drive have only 67 capacity, anyway??)

Is the 80GB your external drive size or the backup image size?

supermonkey 12-02-2007 12:23 AM

Thanks dnanian for the help today. I have another quick question. Since I am using a encrypted image to store my backup, will I be able to boot from this image if my MBP gets corrupt?

dnanian 12-02-2007 09:14 AM

No, image files aren't real disks, and as such can't be booted from until restored to a supported boot device.

supermonkey 12-02-2007 01:05 PM

Quote:

Originally Posted by dnanian (Post 15870)
No, image files aren't real disks, and as such can't be booted from until restored to a supported boot device.

I see. Is there anyway to protect the files without using a encrypted image, and also make it bootable?


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