Actually, most drives write faster than they read; I'm not sure exactly why this is the case, but here are several "drive comparison" pages from barefeats.com that can back me up; the only tests that aren't totally behind my position here are the 15,000 RPM Ultra320 SCSI drives, but they're really all over the map; some support you, some support me. The other two pages (serial ATA and notebook drives) show that writing is generally faster than reading. I do, however, completely agree with your random versus sequential analysis; it takes the drive a little bit of time to jump around and find the right cylinder to read from. http://www.barefeats.com/hard27.html http://www.barefeats.com/hard31.html http://www.barefeats.com/hard28b.html On Aug 7, 2004, at 12:22 PM, b wrote: > A few 'pointers' drives read faster thn they write, and they read > sequentially-oriented files faster than randomly located files. > > Packet size, state of the drives fragmentation and free space, and > size of the file also affects speed (not just the 'time', but actual > per second transfer rate).