Re: [libvirt-users] Advice on virtio, or any virtualization solution for hdparm

At the present moment, my guest is running inside qemu and host is kvm intel, running Ubuntu 14.04, kernel is 4.3.0 stable. From within the guest, when I run "hdparm -i /dev/sdb" on the guest, I get: HDIO_GET_IDENTITY failed: Invalid argument as the error,but on the host, I will get the full harddisk/SSD info. Can I know how to resolve this so that the output is the same for both host and guest? My strace of hdparm from within the guest (just "-e ioctl" is traced): ioctl(3, HDIO_GET_MULTCOUNT, 0x618ef0) = -1 EINVAL (Invalid argument) ioctl(3, SG_IO, {'S', SG_DXFER_FROM_DEV, cmd[16]=[85, 08, 0e, 00, 00, 00, 01, 00, 00, 00, 00, 00, 00, 40, ec, 00], mx_sb_len=32, iovec_count=0, dxfer_len=512, timeout=15000, flags=0, data[512]=["@\0\377?7\310\20\0\0\0\0\0?\0\0\0\0\0\0\0HPAD0409105B"...], status=00, masked_status=00, sb[0]=[], host_status=0, driver_status=0, resid=0, duration=184, info=0}) = 0 ioctl(3, HDIO_GET_IDENTITY, 0x7fffda088500) = -1 EINVAL (Invalid argument) HDIO_GET_IDENTITY failed: Invalid argument +++ exited with 22 +++