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Subjectvfat <-> vfat copying of ~700MB file, so slow!
Copying between vfat <-> vfat partitions is so slow. It seems
that it's vfat/msdos kernel driver problem because I tried to copy
this file between few partitions (all these on the same disc):

hda: IBM-DTLA-307030, ATA DISK drive
hda: 60036480 sectors (30739 MB) w/1916KiB Cache, CHS=3737/255/63, UDMA(33)

hdparm settings:
/dev/hda:
multcount = 16 (on)
I/O support = 0 (default 16-bit)
unmaskirq = 0 (off)
using_dma = 1 (on)
keepsettings = 0 (off)
nowerr = 0 (off)
readonly = 0 (off)
readahead = 8 (on)
geometry = 3737/255/63, sectors = 60036480, start = 0

I tried it on 2.4.0 kernel, P166MMX, 96MB RAM, Soyo 5XB5 mainboard:
00:00.0 Host bridge: Intel Corporation 430TX - 82439TX MTXC (rev 01)
00:07.1 IDE interface: Intel Corporation 82371AB PIIX4 IDE (rev 01)

File was about 700MB and:

vfat -> ext2 -- by whole time, copying speed was about 3,6-3,8MB/s
ext2 -> vfat -- similar results
vfat -> vfat -- 3,4MB/s at beggining of copying,
2,3MB/s after 1 minute of copying,
1,7MB/s - 2 min,
1,4MB/s - 3 min
1,3MB/s - 4 - about 45% of file already copied
1,2MB/s - 5 - 51%
1,1MB/s - 6 - 58%
1,0MB/s - 7 - 63%
1,0MB/s - 8 - 67%
0,95MB/s - 9 - 72%
0,91MB/s - 10 - 76%
0,87MB/s - 11 - 81%
0,84MB/s - 12 - 85%
0,81MB/s - 13 - 88%
0,78MB/s - 14 - 92%
0,76MB/s - 15 - 96%
0,74MB/s - 16 minute, 99% of file

so average speed is about 730kb/s only !!! I was copying under midnight
commander (4.5.51) so these speed values are from mc.

Patches or comments welcome.

--
Arkadiusz Miśkiewicz, AM2-6BONE [ PLD GNU/Linux IPv6 ]
http://www.t17.ds.pwr.wroc.pl/~misiek/ipv6/ [ enabled ]
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