I am backing-up HP 6735s data to seperate Iomega hard-drive. The speed is displayed as 7.0 MB/sec., and is taking some while, about 26GB of files to copy. This seems a bit slow, although it's some while since I backed-up large amounts of data. I do not think this is usual, any comment please?
Older (IDE) hard drives can only run at a long-term (ie not instantaneously from their cache) read rate of 30-40MBps - which is less than USB2. Added to that writing is much slower. And writing involves some reading too, and USB2 only works one way at a time. And small files add lots of overhead writing file system data in between writing the data files. And that if the drive is fragmented, there is lots of (much slower) head movements in between writing blocks. And if the drive is older and doesn't use some of the optimization techniques. Then the whole process is much slower than you might think.