You got it backwards:'hdparm -I' knows that this is a native 4k disk: Model Number: ST3000DM001-9YN166 Logical Sector size: 512 bytes Physical Sector size: 4096 bytes Logical Sector-0 offset: 0 bytes device size with M = 1024*1024: 2861588 MBytes device size with M = 1000*1000: 3000592 MBytes (3000 GB)
Here is good reading about 4K sectors, emulation etc : http://www.seagate.c...ives-master-ti/
Pardon my butting in on this argument, but what you are showing here is a AF drive in 512e mode. That's fine...this is required for a lots of software (like backup/restore programs) that interact with the drive at a sector level and are not 4K sector aware.
But I am unclear about what that has to do with the original issue of MBR vs. GPT. I guess you could have a MBR drive, using 4k logical and physical sectors exceed the 2.2TB limit, but both your hardware and your OS (and any direct disk accessing software) would have to understand 4K sectors. Boot from a "traditional" disk and add a driver and you can avoid some of the hardware (BIOS) issues, and maybe you could run via 512e on the storage only drive.
But 512e is not a good solution for a DVR since you will often have the situation of misaligned file boundaries. If one video file uses 3 emulated 512 sectors inside one 4K sector, and then the next file wants to use the other 5, you'd have to read the entire 4K sector into memory, merge the new data with the old, and then rewrite the entire sector. This is bound to happen since the DVR software, by definition in this example, thinks it is running on a 512 byte sector drive. Now imagine doing this for 5 write and 3 read processes at once and you pretty soon get someplace I don't think you want to be.
Sure, there are plenty of ways to get 4K sector drives to work...but given the parameters of a DVR I think you either want it done via 512 byte emulation in some dedicated hardware (i.e. a USB drive, which is how Dish does it) or you want to do it through native 4K sector support in the OS (which is exactly what DirecTV has done in the HR34).
Edited by Diana C, 10 October 2012 - 11:05 AM.