Kingston claims 300K: http://www.kingston.com/products/MKF_2603CF.pdf http://www.kingston.com/literature/MKF_591EliteProCF.pdf
Sandisk Industrial claims 300K-2M "industrial", but only 100K "extended" cycles (whatever that may mean): http://www.sandisk.com/industrial_cf_card_specifications.html Here's the culprit: http://www.toshiba.com/taec/adinfo/nandflash/ ...clearly states that MLC NAND Flash memory has an expected endurance of 10,000 read/write cycles. Bottom line is that flash memory designed for industrial application is likely much more reliable than flash-cards purchased for digital cameras and such. Toshiba is actively promoting a consumer flash memory technology with an expected endurance of 10,000 cycles. While that technology will be more than sufficient for the intended audience, this would present a performance risk for an embedded application; so if I wanted to replace my HD with a flash-card, I would need to be rather mindful of the type of flash memory utilized in that card. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of George Pajari Sent: Friday, May 21, 2004 12:40 PM To: [EMAIL PROTECTED] Subject: Re: [Asterisk-Users] Asterisk on Compact PCI platform > A modern CF card has about 10,000 write cycles before it starts > failing. Don't know where you're buying that crap but quality CF modules have a per-sector lifetime of between 300,000 and 2,000,000 write cycles. On top of this, good quality CF modules have very sophisticated wear levelling firmware that map external block addresses to different physical sector addresses to reduce the possibility of "burning out" specific sectors from frequent updates. In addition to my work with NetVoice Communications I am also associated with a Linux fax software company (www.faximum.com) that ships a fax server appliance which run entirely on CF. We have customers sending hundreds of faxes per day (comparable to hundreds of voice mails per day) without any trouble after a year and a half (nor would we expect any problem). I.M.H.O. The fears expressed on this list about the lifetime of CF modules are not based on either the facts or empirical evidence. g. _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
