On Sat, Apr 17, 2010 at 3:01 AM, Keshav P.R. <[email protected]> wrote: > Hai Greg, > There are 4K sector drives available in the market, > specifically from Western Digital in the name of "Advanced Format" drives > http://www.wdc.com/en/products/advancedformat/ .
4K Physical 512 logical I am fairly confident. Physical defines the layout on the platter, which is very important for performance issues, but is meaningless to the bios. 512 logical defines how the SATA bus commands work. Bios only cares about logical. Read some of Martin Petersen's posts on LKML and [email protected]. He implemented most of the 4K physical sector support in linux and has worked with the userspace tool maintainers to get them working correctly. In particular he wrote the "topology" patch that went into the kernel about a year ago. One of the main drivers for that was the fact we now have a divergence between logical and physical sector size. Greg -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to [email protected] Please read the FAQ at http://kernelnewbies.org/FAQ
