Slow backup
 

I have two identical WD USB disks and I made a backup from one disk to the other and this lasted more then 22 hours!
Is this normal?


(Capacity: 1 TB (1.000.204.886.016 bytes)
Removable Media: Yes
Detachable Drive: Yes
BSD Name: disk1
Product ID: 0x1001
Vendor ID: 0x1058 (Western Digital Technologies, Inc.)
Version: 1.05
Serial Number: 574341553431323535393730
Speed: Up to 480 Mb/sec
Manufacturer: Western Digital
Location ID: 0xfd344000
Current Available (mA): 500
Current Required (mA): 2
Partition Map Type: GPT (GUID Partition Table)
S.M.A.R.T. status: Not Supported)


Evaluated 537818 items occupying 451.10 GB (65461 directories, 471181 files, 1176 symlinks)
| 02:29:33 PM | Info | Copied 537647 items totaling 450.60 GB (65455 directories, 471016 files, 1176 symlinks)
| 02:29:33 PM | Info | Cloned 450.60 GB of data in 81372 seconds at an effective transfer rate of 5.67 MB/s

Model Name: iMac
Model Identifier: iMac5,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2,33 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 4 MB
Memory: 4 GB
Bus Speed: 667 MHz
Boot ROM Version: IM51.0090.B09
SMC Version (system): 1.9f4

Well, 6MB/s or so isn't out of line. Were these two externals running on USB or something?

Yes, USB drives.

That's likely why it was running slowly, then... two USB drives on the same bus, not that fast.

GuuZ

:D I'm sure Dave will notice, but believe he meant "same BUS" in his last line, not "same BUG."

Whilst not taking 22 hours, I do find that incremental/smart backups over FW are now taking 35 minutes in 10.6, when they took about 15 minutes in 10.5.

Chris

That's a different issue: see the discussion at the Shirt Pocket Watch blog.

Ah, thank you.

Chris