Re: [pfSense Support] Write 512MB image onto 4GB CF-card ?
On 16.09.10 21:40, Jim Pingle wrote: And IIRC if the card has any kind of built-in wear leveling, it will extend the life of the card to 8 times what it would have otherwise been. This calculation is IMHO a bit too optimistic. I think wear levelling works with some percentage, maybe 5 or 10% defects but not 87,5%. But I am not expert. Beat - To unsubscribe, e-mail: support-unsubscr...@pfsense.com For additional commands, e-mail: support-h...@pfsense.com Commercial support available - https://portal.pfsense.org
Re: [pfSense Support] Write 512MB image onto 4GB CF-card ?
On 16.09.10 21:40, Jim Pingle wrote: And IIRC if the card has any kind of built-in wear leveling, it will extend the life of the card to 8 times what it would have otherwise been. This calculation is IMHO a bit too optimistic. I think wear levelling works with some percentage, maybe 5 or 10% defects but not 87,5%. But I am not expert. In any case, this just seems to work just fine... unfortunately I didn't find sandisk at my reseller, they had dane-elec or kingston. Being with kingston last time and these boot issues, I chose dane-elecs this time... they were the same size, but 3x more expensive than kingston... Not that more expensive is better - but having no other alternative at hand - I chose to go this way... Other than that - when using Physdiskwrite to write the 4GB image - it consistently failed at about 400kbytes written... When I took the 512MB image, all 5 cards wrote without a hassle... (I tried 3 cards with the 4GB image, only one succeeded !) I decided to rewrite all 5 cards with the 512MB image - this went well (also, when duplicating the slice to s2, this is also far much faster now - logically :) ) Thanks for the explaining - don't know if this dane-elec has wear-levelling though (I'd suspect they would mention this, if it was) - To unsubscribe, e-mail: support-unsubscr...@pfsense.com For additional commands, e-mail: support-h...@pfsense.com Commercial support available - https://portal.pfsense.org
Re: [pfSense Support] Write 512MB image onto 4GB CF-card ?
On Fri, Sep 17, 2010 at 2:45 AM, Michel Servaes mic...@mcmc.be wrote: Thanks for the explaining - don't know if this dane-elec has wear-levelling though (I'd suspect they would mention this, if it was) My understanding with SSDs (no idea if CFs are the same way) is that wear-levelling works with available formatted area as well as unpartitioned space. Or having read all the SSD articles on anandtech in the last couple years I have the belief that the fuller your drive is the quicker you will defeat its wear-levelling benefits. db - To unsubscribe, e-mail: support-unsubscr...@pfsense.com For additional commands, e-mail: support-h...@pfsense.com Commercial support available - https://portal.pfsense.org
[pfSense Support] Write 512MB image onto 4GB CF-card ?
Would it hurt, to write a 512MB image onto a 4GB CF-card ? I don't need the extra space, and this shortens my write-time drastically :) I'm trying it right now... if no-one knows, I'll tell how it turned out anyway (if intrested). - To unsubscribe, e-mail: support-unsubscr...@pfsense.com For additional commands, e-mail: support-h...@pfsense.com Commercial support available - https://portal.pfsense.org
Re: [pfSense Support] Write 512MB image onto 4GB CF-card ?
On 9/16/2010 3:34 PM, Michel Servaes wrote: Would it hurt, to write a 512MB image onto a 4GB CF-card ? I don't need the extra space, and this shortens my write-time drastically :) I'm trying it right now... if no-one knows, I'll tell how it turned out anyway (if intrested). It works fine. And IIRC if the card has any kind of built-in wear leveling, it will extend the life of the card to 8 times what it would have otherwise been. Jim - To unsubscribe, e-mail: support-unsubscr...@pfsense.com For additional commands, e-mail: support-h...@pfsense.com Commercial support available - https://portal.pfsense.org
