-----Original Message----- From: Nick Rout [mailto:[EMAIL PROTECTED] Sent: Tuesday, 24 June 2008 11:20 p.m. To: [email protected] Subject: Re: slow data rates for usb flash drive
On Tue, Jun 24, 2008 at 11:11 PM, Nick Rout <[EMAIL PROTECTED]> wrote: > I have an imation 4G flash drive that is sitting in a USB2 port. I am > transferring a 3.7G file from the computers sata hard drive to the usb > drive. > > It seems to be taking about 20 minutes This seems far too long. USB > data rate 60MB/s. > > 3719MB/60MB/s = 62 seconds, give or take. > > Now I know I won't get a sustained rate anywhere near that, but the > predicted time is 20 odd times over the theoretical minimum time. > This may also be of interest: 'Differences in the type of memory and, to a lesser extent, the type of I/O controllers used by USB drives can make one device perform two or three times faster and last (theoretically, at least) 10 times longer than another, even if both sport the USB 2.0 logo.' >From "Not all USB drives are created equal" http://www.computerworld.com/action/article.do?command=viewArticleBasic&; taxonomyName=storage&articleId=9093718&taxonomyId=19&intsrc=kc_feat John ************************************************************************************************** Check out our web site: http://www.cdhb.govt.nz This email and attachments have been scanned for content and viruses and is believed to be clean This email or attachments may contain confidential or legally privileged information intended for the sole use of the addressee(s). Any use, redistribution, disclosure, or reproduction of this message, except as intended, is prohibited. If you received this email in error, please notify the sender and remove all copies of the message, including any attachments. Any views or opinions expressed in this email (unless otherwise stated) may not represent those of Canterbury District Health Board **************************************************************************************************
