Rockbox mail archiveSubject: Re: slow/delaying usb connection to archos/rockbox
Re: slow/delaying usb connection to archos/rockbox
From: Linus Nielsen Feltzing <linus_at_haxx.se>
Date: Sat, 21 Sep 2002 17:55:56 +0200
On Sat, 21 Sep 2002 16:29:11 +0200, Vladimir Pantelic wrote:
> Linux could be much quicker though if it would use the information
> in the FS_Info sector of FAT32 where the number of free clusters
> and the last cluster allocated are stored. So Linux has to read tha
> whole FAT to know how much free space there is on the drive.
> The kernel sources say that Linux does ignore this information, I
> have no idea why ?
For what I know, the FS_Info is not guaranteed to be correct. So
Linux doesn't bother, and always reads the while FAT. That approach
works on fast drives, but slow USB drives suffer from it.
-- Linus Nielsen Feltzing, linus_at_haxx.se on 2002-09-21Received on 2002-09-21