Bas Mevissen (firstname.lastname@example.org)
Thu, 5 Feb 1998 22:39:16 +0100
: From: David Campbell <email@example.com>
: To: Bas Mevissen <firstname.lastname@example.org>
: Cc: email@example.com
: Subject: Re: [PARPORT] Speed of ppa 1.40 driver
: Date: Thursday, February 05, 1998 9:24 AM
: > From: "Bas Mevissen" <firstname.lastname@example.org>
: > To: "Grant R. Guenther" <email@example.com>
: > Cc: <firstname.lastname@example.org>
: > Subject: [PARPORT] Speed of ppa 1.40 driver
: > Date: Wed, 4 Feb 1998 21:37:26 +0100
: > Hi Grant,
: > I use the ppa 1.40 driver with kernel 2.0.33 on a : > I use the ppa 1.40 driver with kernel 2.0.33 on a 486@133MHz. I used to
: > around 16-20 Mb/min with my ZIP drive (R/W). This sank a bit to app. 11
: > Mb/min and in daily use the performance got even more worse.
: There is a known "feature" (problem) with VFAT/UMSDOS/MSDOS partitions on
: ZIP disks. It has to do with MSDOS <=> UNIX text file translation.
: > Can you give me some clues why the transfer speed is lower than before.
: > don't remember what version I got the slowdown, but I think is was at
: > point where the software/hardware direction detection routine came in.
: > BTW. my I/O chip is a SMC37C665GT in EPP mode. PPA reports that this
: > has software direction control, is that correct?
: That should be fine.
: > The motherboard is a ASUS PVI/SP3 with the lates BIOS.
: Could you perform a test using:
: "time dd if=/dev/sda of=/dev/null count=20480"
: The above command should copy 10Mb from the ZIP drive and return the time
: taken. If this is less than 20Mb then I am worried...
It's time to get worried :-(
I did some other timings earlier this week:
16384 blocks of 1K: 1:34.82
16 blocks of 1M: 1:32.24
Not too much :-((
: David Campbell
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: "All parallel ports are equal - Some are more equal than others"
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This archive was generated by hypermail 2.0b3 on Wed 30 Dec 1998 - 10:17:24 EST