* L A Walsh (lkml@xxxxxxxxx) wrote: > 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 think that's an easy one :-) > I'm not sure if it is opensource or not. > *sigh* megacli is a special for LSI RAID controllers isn't it? If so, then perhaps the RAID controller is hiding some info depending on how it's configured and using a special to get the info from the controller. How about trying one of the SCSI utils, like sginfo -a ? Dave > > > Karel > > > > > -- -----Open up your eyes, open up your mind, open up your code ------- / Dr. David Alan Gilbert | Running GNU/Linux | Happy \ \ dave @ treblig.org | | In Hex / \ _________________________|_____ http://www.treblig.org |_______/
