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Re: [Xen-users] Xen on USB Key

from [Jayesh Salvi] [Permanent Link][Original]
To: "Petersson, Mats" <mats.petersson@xxxxxxx>
Subject: Re: [Xen-users] Xen on USB Key
From: Jayesh Salvi <jayeshsalvi@xxxxxxxxx>
Date: Mon, 23 Jan 2006 09:17:06 -0600
Cc: Henning Sprang <henning_sprang@xxxxxxx>, xen-users@xxxxxxxxxxxxxxxxxxx
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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
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