Sandisk Extreme Reader

Just got an Extreme cf reader, and it doesn't appear to be any faster than my old generic reader, with Extreme IV cards. Do I have to download a driver from Sandisk? The only software in the box was their recovery software. The only thing I can think of is, my old desk top pc may still be on USB 1.0 not 2.0.

You are probably correct.

I started a thread on here a week or so ago...lamenting over my slow card reading until I realized there were much faster readers. I bought the one you mentioned...and am amazed over the difference.

How fast does it generally transfer? My extreme II cards usually go at about 2 images/second. (16-18mb/s)

USB 2.0 as well.

I just bought one of those card readers and still havent even had a chance to transfer any pictures with it! Now you have me wondering if it actually is any faster.

A quick update. Checked on the Sandisk site and transfer rates work out to about a minute per gig with an Extreme IV cards in this reader. That's what I'm getting from it now, so it's performing as required. Downside is, the cheapo $10 Integral reader I picked up last year is just as fast Still, it's nice n shiny...

I bought one yesterday. My cheapo reader was giving me 3.8 megabytes/sec, this one gives me 15.6 with the same card, an Extreme III.

Dave

bildeb0rg wrote in post #4722588
A quick update. Checked on the Sandisk site and transfer rates work out to about a minute per gig with an Extreme IV cards in this reader. That's what I'm getting from it now, so it's performing as required. Downside is, the cheapo $10 Integral reader I picked up last year is just as fast Still, it's nice n shiny...

It's a limitation of usb2.0

Get their firewire reader if you want even faster.

sadatk wrote in post #4726868
It's a limitation of usb2.0

Get their firewire reader if you want even faster.

It is? According to the below website, TSF speeds have been recorded as high as 30MB/s

http://www.everythingu​sb.com/usb2/faq.htm

The problem with USB is that it uses a master/slave architecture which relays on the main processor to do much of the work. Depending on what is running at the time, available memory, and OS configuration, you may never see the theoretical speeds USB-II claims. Firewire uses a peer to peer protocol where the smarts are in the peripherals themselves. THis allows for much higher throughputs especially in sustained data transfers.

Secondly, your hard drive may also be a throttle. You may be able to get the data to the PC very quickly but it fills up the hard drive buffer and your waiting the the hard drive to write all the data. There are lots of things that can affect hard drive performance such as a single drive, lots of paging, other applications using the drive as well, a slow drive or a small buffer.

gjl711 wrote in post #4727218
The problem with USB is that it uses a master/slave architecture which relays on the main processor to do much of the work. Depending on what is running at the time, available memory, and OS configuration, you may never see the theoretical speeds USB-II claims. Firewire uses a peer to peer protocol where the smarts are in the peripherals themselves. THis allows for much higher throughputs especially in sustained data transfers.

Secondly, your hard drive may also be a throttle. You may be able to get the data to the PC very quickly but it fills up the hard drive buffer and your waiting the the hard drive to write all the data. There are lots of things that can affect hard drive performance such as a single drive, lots of paging, other applications using the drive as well, a slow drive or a small buffer.

wow, you must be a computer engineer,man!Anyway for max transfer use firewire connection instead.

Thanks for the info guys, looks like fire wire is the next step then. John, my pc is pretty old school so you're probably right about the drive/processor choking. Theoretical transfer rates work out to 55 secs per gig and I'm getting just over a minute in real time, so it's not that far away

I love my Extreme Firewire reader. With the Extreme IV card, it is much faster than any USB reader I've ever used.
me