Mailinglist Archive: opensuse (1382 mails)

[G T Smith <grahamsmith@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>]

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Anders Johansson wrote:
> On Monday 01 June 2009 18:03:38 Randall R Schulz wrote:
> > On Monday June 1 2009, Anders Johansson wrote:
> > > On Monday 01 June 2009 17:23:42 Randall R Schulz wrote:
> > > > Do you know any block devices these days that aren't disks or flash
> > > > drives?
> > > Optical devices (CD, DVD, BluRay), iSCSI, FCoE, ATAoE, nbd, loopback
> > > devices, ram disks
> > And how many of them (that are not in fact disks or intermediaries to
> > disks) are suitable for acting as the physical storage for a VMware
> > virtual disk? Certainly not any of the optical types.
>
> Aside from performance, why not? Most of the time a disk doesn't even have to 
> be writable. It is perfectly possible to have almost all your file system 
> running on a DVD (for example), though from a performance perspective perhaps 
> not desirable

Consumer grade optical media degrades too fast to be really useful for
anything that requires regular RW access, and unfortunately any
requirement for a any part of a FS to be writeable may require optical
media writes to be made whether or not a change is made to the user data
on the media. I refer you to...

http://fy.chalmers.se/~appro/linux/DVD+RW/

For a starting point for a more detailed technical overview...


- --
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I have always wished that my computer would be as easy to use as my
telephone.
My wish has come true. I no longer know how to use my telephone.

Bjarne Stroustrup
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