Mailinglist Archive: opensuse (3100 mails)

[James Knott <james.knott@xxxxxxxxxx>]

Hans du Plooy wrote:
> Guys,
> 
> I think we're missing the point here.  Mounted sync or no sync, writing
> to a USB flash drive in SUSE 10.0 takes forever.  Without sync it just
> *appears* faster but you still wait the same amount of time for it to
> finish up.  According to the Konq. copy progress thingy, writing to my
> USB flash drive happens at 30-40kb/s.  This is a USB2 device on a USB2
> controller.  This is slower than even USB 1.1 used to be.
> 
> In SUSE 9.3 writing to a USB flash drive, again, sync or no sync, was a
> lot quicker.
> 
> The weird thing is, if I put a normal IDE drive in an external USB
> enclosure, and plug that in, I can write at 26mb/s while it is mounted
> sync.
> 
> So why is it different for flash drives?  What broke between 9.3 and
> 10.0?

I have found there's in immense difference betweeing sync and no sync.
Without sync, it's usable.  With sync, it's not.  Last night, I was
getting 5 - 6 MB/s.  that's 40 - 48 Mb/s on USB 2.  With sync, I was
generally getting under 20 KB/s and a lot of "stalled" messages.

Use the mount command, to ensure it's really mounted without sync.