Hi,
On Monday 23 July 2012 17:48:50 Jerry wrote:
> On Mon, 23 Jul 2012 03:02:56 -0700 (PDT)
> Jakub Lach articulated:
>
> > What I previously meant is that I had such pendrive, that
> > without former formatting in Windows, didn't even show
> > up as device in FreeBSD- was completely useless.
>
What I previously meant is that I had such pendrive, that
without former formatting in Windows, didn't even show
up as device in FreeBSD- was completely useless.
the result of XXI century "way" of programming - flash translator firmware
in that case.
They don't even read specs about USB stora
Format without partition table?
yes. Windows recognizes it properly except Win98/95 (which doesn't work
with large USB drives anyway).
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To unsu
However, after formatting it in Windows why duplicate it again in
FreeBSD? It serves no purpose that I am aware of. By the way, it is too
bad that FreeBSD is not able to take advantage of the "exFat" format
fusefs-exfat in ports
still i don't really care, i would reformat in as FAT32 anyway.
_
> However, after formatting it in Windows why duplicate it again in
> FreeBSD?
Just to check if it works as should, also trim sectors and whatever.
Format without partition table?
But in this case, no 1 reason was probably most important.
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On Mon, 23 Jul 2012 03:02:56 -0700 (PDT)
Jakub Lach articulated:
> What I previously meant is that I had such pendrive, that
> without former formatting in Windows, didn't even show
> up as device in FreeBSD- was completely useless.
>
> That does not mean I didn't newfs_msdosfsed it after
> tha
> i have never seen USB 2.0 exceeding 35MB/s write and 40MB/s read.
That means I essentially got what I wanted- as
high read output as possible on USB 2.0. Thanks.
Indeed 35MB/s-40MB/s is common reported maximum
throughput.
> dd if=/dev/zero of=/dev/da0 bs=64k count=1
> newfs_msdosfs /dev/da0
And USB 2.0 hard limit is 60MB/s.
i have never seen USB 2.0 exceeding 35MB/s write and 40MB/s read.
even when connecting SATA disk over USB-SATA bridge.
60MB/s is wire speed. USB have enormous protocol overhead.
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dd if=/dev/zero of=/dev/da0 bs=1 to 15M
runs, 13-14MB/s from actual files copied
in mc to flash and 36-39MB/s file copied
from flash to hdd in mc.
dd if=/dev/da0 of=/dev/zero bs=15m
gives 33MB/s read.
and this is incredibly high as of any pendrive.
Consider few things:
- pendrive flash mappe
Apparently my speeds are pretty decent,
as this this advertised speed relates to
read speed, and write one is pretty weak.
People are reporting
62-70MB/s read and
17-31MB/s write.
Are you saying that disk clearly bumping
from 40MB/s read barrier (as I saw in midnight
commander is my imagina
On Sun, Jul 22, 2012 at 6:05 PM, Jakub Lach wrote:
> Speaking of misunderstanding, that's certainly
> possible.
>
> How much overhead is "normal" and alternatively,
> why in FreeBSD USB 2.0 reports as "40MB/s" and
> not other arbitrary number.
>
The overhead includes many different things includ
Speaking of misunderstanding, that's certainly
possible.
How much overhead is "normal" and alternatively,
why in FreeBSD USB 2.0 reports as "40MB/s" and
not other arbitrary number.
I hope I didn't sound like "PLEASE HELP I WANT
USB 3.0 SPEEDS ON USB 2.0"...
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On Sun, Jul 22, 2012 at 4:20 PM, Jakub Lach wrote:
> Hi,
>
> I was fortunate enough to buy USB 3.0 pendrive,
> which actually works with FreeBSD just ripped from
> package! (normal _empty_ FAT filesystem, no
> garbageware added, no need to format).
>
> It actually bounces from 40MB/s limit when r
18MB/s write is figure from few
dd if=/dev/zero of=/dev/da0 bs=1 to 15M
runs, 13-14MB/s from actual files copied
in mc to flash and 36-39MB/s file copied
from flash to hdd in mc.
dd if=/dev/da0 of=/dev/zero bs=15m
gives 33MB/s read.
Speaking of advertisements, yes I know
but USB 3.0 drives w
which actually works with FreeBSD just ripped from
package! (normal _empty_ FAT filesystem, no
garbageware added, no need to format).
zero difference. newfs_msdos take a moment.
It actually bounces from 40MB/s limit when reading
from it.
Writing is about 18MB/s.
Device is supposed to be "467
This could be deducted, but I will add for clarity, that I
bought USB 3.0 pendrive to use in 2.0 port, to take
advantage of 2.0 to the fullest (as 2.0 pendrives have
slow flashes inside).
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Hi,
I was fortunate enough to buy USB 3.0 pendrive,
which actually works with FreeBSD just ripped from
package! (normal _empty_ FAT filesystem, no
garbageware added, no need to format).
It actually bounces from 40MB/s limit when reading
from it.
Writing is about 18MB/s.
Device is supposed to
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