Unoffical empeg BBS

Quick Links: Empeg FAQ | RioCar.Org | Hijack | BigDisk Builder | jEmplode | emphatic
Repairs: Repairs

Topic Options
#3318 - 18/11/1999 02:21 USB Speed
Kedl
new poster

Registered: 17/11/1999
Posts: 12
Loc: Knoxville, TN
Has someone already been over this?

On my year old laptop I get about 300-350Kbit/s transferring data to the empeg. On my 3 month old desktop I get about the same.

Shouldn't "12 Mbit" USB be a little faster? Is Windoze just that bad? Are both of my machines USB el-crappo? Is the empeg USB just slow?

What kind of rates do other people get?

Anyone?


6GB, Blue, 00272
_________________________
6GB, Blue, S/N 00272, Q 5001

Top
#3319 - 19/11/1999 14:00 Re: USB Speed [Re: Kedl]
rob
carpal tunnel

Registered: 21/05/1999
Posts: 5335
Loc: Cambridge UK
Are you sure you don't mean 300-350K BYTES per second? Divide that 12Mbits/sec by 10 and then subtract a bit more for protocol overhead and you have a realistic ceiling.

The empeg still falls short of this, partly due to lousy USB implementation in Windows and partly because we still have some optimisations to make.

Rob



Top
#3320 - 19/11/1999 16:29 Re: USB Speed [Re: rob]
Kedl
new poster

Registered: 17/11/1999
Posts: 12
Loc: Knoxville, TN
No,I'm quite sure I mean 300Kbit/s. I timed it. Why do you think I asked? It is a factor of 10 or more slower than it should be. I only have the thing half full so far because I only download at night.


6GB, Blue, S/N 00272, Q 5001
_________________________
6GB, Blue, S/N 00272, Q 5001

Top
#3321 - 19/11/1999 21:48 Re: USB Speed [Re: Kedl]
dionysus
veteran

Registered: 16/06/1999
Posts: 1222
Loc: San Francisco, CA
Seems that it goes very quick for a short time (about 10-15 minutes), then doesn't do anything (checking the disk? only I don't hear the hard disk on the empeg going) for about 15-20 minutes, then another burst of 10-15 minutes...
-mark

_________________________
http://mvgals.net - clublife, revisited.

Top
#3322 - 20/11/1999 03:42 Re: USB Speed [Re: Kedl]
rob
carpal tunnel

Registered: 21/05/1999
Posts: 5335
Loc: Cambridge UK
I get something in the region of 200 - 350Kbytes/sec depending upon which machine I use. Are you able to test your machine with a different USB device?

Rob


Top
#3323 - 20/11/1999 06:34 Re: USB Speed [Re: rob]
Felix
new poster

Registered: 05/10/1999
Posts: 7
I've also had the same problems with the USB transfer. It happened on 3 different machines and on Win98 as well as on Win2000. It looks like the software is timing out somewhere in between. In Beta 7b or even in Beta 8 there was more debug output on the serial while transfering via USB. It said something like "preparing..." and then nothing happened for minutes, and then again the same "preparing...". I have had the same problems with Beta 8a, but it doesn't give the debug output anymore, so I can't give you the exact text that was appearing on the serial.
All over this explains the poor transfer rate via USB.

Felix


Top
#3324 - 20/11/1999 08:50 Re: USB Speed [Re: rob]
Kedl
new poster

Registered: 17/11/1999
Posts: 12
Loc: Knoxville, TN
I don't have anything else to test with right now. Haven't needed any USB devices yet. The point is mostly moot now. I've finally got most of my songs over to the unit now. Just have to clean off stuff I don't want (which is fast) and then load new stuff on as I get it (just a few songs at a time).

Wasn't able to fit all my songs. But that other 6GB drive I have sitting here is just begging me to void the warranty; and I want to mess with a CD anyway....

Now I'm off to the Dodge dealership to photocopy the wiring harness pinouts! ;-)


6GB, Blue, S/N 00272, Q 5001
_________________________
6GB, Blue, S/N 00272, Q 5001

Top