Mailinglist Archive: opensuse (3100 mails)

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Re: [SLE] speed in Pen drive access
  • From: "Carlos E. R." <robin1.listas@xxxxxxxxxx>
  • Date: Sun, 5 Mar 2006 01:45:54 +0100 (CET)
  • Message-id: <Pine.LNX.4.61.0603050136540.28502@xxxxxxxxxxxxxxxx>
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The Saturday 2006-03-04 at 21:32 +0200, Hans du Plooy wrote:

> 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?

If that is so, and is measurable, then there probably is a kernel problem
somewhere.

In my experience, nosync is faster simply because the kernel can delay and
optimize the order of writing to a device. It is very effective on
external zip drives, for instance.

- --
Cheers,
Carlos Robinson

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