On 3/12/2019 1:21 AM, Karel Zak wrote: > On Mon, Mar 11, 2019 at 02:34:46PM -0700, L A Walsh wrote: > >> On 3/11/2019 2:21 PM, Dr. David Alan Gilbert wrote: >> >>> * L A Walsh (lkml@xxxxxxxxx) wrote: >>> >>>> Trying to track down why my 4K drives no longer display 4K >>>> in sysfs (/sys) and don't seem to show individual disk >>>> drive information. When I first got the drives, linux displayed >>>> the correct physical disk size, but when I look now, I only >>>> see 512. >>>> >>> Is this one of the PHY-SEC or LOG-SEC fields that lsblk can print? >>> >>> [dg@major ~]$ lsblk -o "NAME,PHY-SEC,LOG-SEC" >>> NAME PHY-SEC LOG-SEC >>> sda 512 512 >>> >> --- >> It would be, if it was correct. Megacli displays: >> >> Sector Size: 512 >> Logical Sector Size: 512 >> Physical Sector Size: 4096 >> >> But lsblk displays 512 for everything. The disk says it uses a 512e format >> with the 'e' meaning it emulates 512 even if not 512. >> > > lsblk, fdisk, blockdev, ... but all of the utils read the information > from kernel. So, it depends how the device reports topology to the > kernel. > Well, that's what I would think but I can't see why the device driver would have been purposely changed to hide the actual physical size or the temperature. That said, megacli has to be reading those values from somewhere -- and I'd tend to think it was accessing the driver as well, but that begs the question -- where is it getting the temperature and physical size from>? It can even read the serial numbers off the disks. I'm not sure if it is opensource or not. *sigh* > Karel > >
