Date: Sun, 13 Aug 2006 21:52:40 +0200 From: Marc van Woerkom <marc.vanwoerkom@FernUni-Hagen.de> To: freebsd-usb@freebsd.org Subject: [Fwd: SD card speed] Message-ID: <44DF8308.9080700@fernuni-hagen.de>
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Maybe someone here can give a comment?
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Message-ID: <44DDD151.5090208@fernuni-hagen.de>
Date: Sat, 12 Aug 2006 15:02:09 +0200
From: Marc van Woerkom <marc.vanwoerkom@fernuni-hagen.de>
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To: freebsd-multimedia@freebsd.org
Subject: SD card speed
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Hi,
just want to ask for your experiences:
I have bought a Hama USB 2.0 Card Reader 35 in 1 and attached it to my
Notebook running FreeBSD 6.1-RC.
With this I use a Panasonic 512 MB "high speed" SD Card.
Reading speed seems ok, iostat displays about 2,8 Mbyte/s reading
transfer rate:
tty ad0 da2 cpu
tin tout KB/t xfrs MB KB/t xfrs MB us ni sy in id
128 101 36.00 2 0.07 8.00 363 2.84 7 0 4 5 84
168 191 17.70 33 0.57 7.99 361 2.82 9 0 3 5 83
360 115 0.00 0 0.00 7.99 359 2.80 10 0 6 4 80
464 194 64.00 1 0.06 8.00 358 2.80 9 0 5 6 80
112 94 0.00 0 0.00 7.99 362 2.82 9 0 4 4 84
112 215 8.38 21 0.17 7.99 360 2.81 9 0 3 3 84
But writing speed seems slow to me, I measure about 56 to 64 kbyte/s
transfer
rate only:
tty ad0 da2 cpu
tin tout KB/t xfrs MB KB/t xfrs MB us ni sy in id
2 110 16.00 1 0.02 8.00 7 0.05 19 0 4 2 75
9 209 16.00 1 0.02 8.00 7 0.05 17 0 2 1 80
8 94 8.00 1 0.01 8.00 7 0.05 19 0 2 1 78
12 110 40.00 2 0.08 8.00 8 0.06 28 0 2 2 68
10 113 0.00 0 0.00 8.00 7 0.05 16 0 2 2 81
11 113 16.00 5 0.08 8.00 7 0.05 17 0 5 0 78
Is that ok?
Or does this card slug? Or is something ill-configured?
Regards,
Marc
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