On 26-Jan-07, at 7:29 PM, Selim Daoud wrote:
it would be good to have real data and not only guess ot anecdots
this story about wrong blocks being written by RAID controllers
sounds like the anti-terrorism propaganda we are leaving in: exagerate
the facts to catch everyone's attention
.It's going to take more than that to prove RAID ctrls have been doing
a bad jobs for the last 30 years
It does happen. Hard numbers are available if you look. This sounds a
bit like the "RAID expert" I bumped into who just couldn't see the
paradigm had shifted under him -- the implications of "end to end".
Let's make up real stories with hard fact first
s.
Related links:
https://www.gelato.unsw.edu.au/archives/comp-arch/2006-September/
003008.html
http://www.lockss.org/locksswiki/files/3/30/Eurosys2006.pdf [A Fresh
Look at the Reliability of Long-term Digital Storage, 2006]
http://www.ecsl.cs.sunysb.edu/tr/rpe19.pdf [Challenges of Long-Term
Digital Archiving: A Survey, 2006]
http://www.cs.wisc.edu/~vijayan/vijayan-thesis.pdf [IRON File
Systems, 2006]
http://www.tcs.hut.fi/~hhk/phd/phd_Hannu_H_Kari.pdf [Latent Sector
Faults and Reliability of Disk Arrays, 1997]
--T
On 1/26/07, Ed Gould <[EMAIL PROTECTED]> wrote:
On Jan 26, 2007, at 12:52, Dana H. Myers wrote:
> So this leaves me wondering how often the controller/drive
subsystem
> reads data from the wrong sector of the drive without notice; is it
> symmetrical with respect to writing, and thus about once a drive/
year,
> or are there factors which change this?
My guess is that it would be symmetric, but I don't really know.
--Ed
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