Comment 0 for bug 1894778

When booting with root filesystem on sata disks under Intel VMD mode, following errors printed in dmesg and no disk is found, nor booting into it:

  [ 6.163286] ata1.00: qc timeout (cmd 0xec)
  [ 6.165630] ata1.00: failed to IDENTIFY (I/O error, err_mask=0x4)
  [ 6.483649] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
  [ 16.659284] ata1.00: qc timeout (cmd 0xec)
  [ 16.661717] ata1.00: failed to IDENTIFY (I/O error, err_mask=0x4)
  [ 16.663161] ata1: limiting SATA link speed to 1.5 Gbps
  [ 16.983890] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
  [ 48.147294] ata1.00: qc timeout (cmd 0xec)
  [ 48.149737] ata1.00: failed to IDENTIFY (I/O error, err_mask=0x4)
  [ 48.467889] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 310)

  $ lspci
  ...
  10000:e0:17.0 SATA controller: Intel Corporation Device a0d3 (rev 20)