Hi Rugxulo, that mail/quote was a bit long, trying to summarize ;-)
- UDMA XDMA XCDROM (-2/2006) are only for IDE/ATAPI - GCDROM XGCDROM are based on XCDROM and might work for SATA (XGCDROM: SATA+ATAPI) but tend to fail. - *UIDE and UIDEJR* supports SATA/IDE/ATAPI, CD / DVD (possibly BD, HD-DVD?) and harddisks. UIDE also has a cache for all drives and a BIOS based floppy cache. For AHCI boards, set the BIOS to native IDE / legacy. - to access SATA CD/DVD/..., you should use UIDE(JR) and not the old drivers. Also supports IDE/ATAPI. - using UIDE(JR) also gives better protected mode DMA stability and performance than BIOS for harddisks if (J)EMM(386/EX) / protected mode is used. Recommended. - using caches is recommended (UIDE, lbacache, cdrcache) for example because metadata (FAT, directories) are accessed sector by sector (also read-ahead, tickle?) - the UIDE on ibiblio needs update (15 Aug 2010) and the old UDMA XDMA XCDROM GCDROM should be marked as old. I think we should still keep the old drivers for reference be we should indeed have them "less announced" (e.g. LSM). Talking about read-ahead, I think that in particular for SSD it would be very interesting to do even a small amount of write pooling... This is because SSD are very fast with seek and read but each write has some delay. Writing larger blocks less often is therefore faster than many small ones. I would suggest to experiment with something like 4-64 kB cache pool size a sub-second maximum age of dirty sectors. This still gives data and metadata the chance to accumulate to some/much larger chunks while keeping the risks limited. Regards, Eric > http://johnson.tmfc.net/dos/driver.html > www.ibiblio.org/pub/micro/pc-stuff/freedos/files/dos/udma/ ------------------------------------------------------------------------------ Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 & L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today http://p.sf.net/sfu/msIE9-sfdev2dev _______________________________________________ Freedos-user mailing list Freedos-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-user
