[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-users] Xen on USB Key


  • To: "Petersson, Mats" <mats.petersson@xxxxxxx>
  • From: Jayesh Salvi <jayeshsalvi@xxxxxxxxx>
  • Date: Mon, 23 Jan 2006 09:17:06 -0600
  • Cc: Henning Sprang <henning_sprang@xxxxxxx>, xen-users@xxxxxxxxxxxxxxxxxxx
  • Delivery-date: Mon, 23 Jan 2006 15:25:39 +0000
  • Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:references; b=A5DLwNxmx+FuXYAhyKqdfafIO2d+gPJYmEGb1GOa1BdMNMGpocwXNwUQYMLT3FQtJc196nJl7aGHXjfbYH0YvvNC+QH1I6BHeo8S3TNYiWSCFF9AJMEdJmpbPJjPAc6ylR6/yvO2XXwtotniyf3NXyYRns1JIu63CnFNYjS08f0=
  • List-id: Xen user discussion <xen-users.lists.xensource.com>

If you do a write every second (to the same place), one million seconds
is about 11 days (277 hours), but it's very unlikely that a clever Flash
File-system would allow you to write to the same area over and over
again, as it's normally remapping sectors when they are written, rather
than doing a erase/write cycle, so it should last a lot longer than
that. [Caching in the OS will also help if you're writing to the same
place].

--
Mats

I think yes, OS is smart reagarding mounted devices (or USB devices I don't know). While working on the USB drives, when I do major copies to USB drive, it takes pretty long time when I unmount that device. I guess, it is at that time when the OS/USB driver does actual I/O. If anyone has some definite info/pointers on this aspect, I will be greatful to know.

Thanks,
Jayesh
_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users

 


Rackspace

Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.