https://bugzilla.kernel.org/show_bug.cgi?id=199155 --- Comment #3 from d gilbert (dgilbert@xxxxxxxxxxxx) --- On 2018-03-22 05:08 AM, bugzilla-daemon@xxxxxxxxxxxxxxxxxxx wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=199155 > > --- Comment #2 from Bryan Seitz (seitzbg@xxxxxxxxx) --- > Is there some other place this is stored under /sys ? > There shouldn't be any need. If that SATA SSD is behind a compliant SATL (SCSI to ATA Translation Layer) then it should supply the ATA Information VPD page plus a SCSI ATA PASS-THROUGH command so that an ATA Identify command can be tunnelled through to the SSD (and the response will have the untruncated device details). Tools like smartmontools use that ATA PASS-THROUGH. This is a SATA SSD connected via a USB Type C to SATA dongle that uses UASP. # lsscsi -gs [0:0:0:0] disk INTEL SS DSA2M080G2GC 2CV1 /dev/sda /dev/sg0 80.0GB # hdparm -I /dev/sg0 /dev/sg0: ATA device, with non-removable media Model Number: INTEL SSDSA2M080G2GC Serial Number: CVPO017405HT080JGN Firmware Revision: 2CV102M3 Transport: Serial, ATA8-AST, SATA 1.0a, SATA II Extensions, SATA Rev 2.5, SATA Rev 2.6 .... Note that is not the transport connected to my laptop (USB is). # sg_vpd -p ai /dev/sda fetching VPD page failed: Illegal request sg_vpd failed: Illegal request That is not good, the SATL should implement the AI VPD page. # smartctl -a /dev/sg0 smartctl 6.7 2018-03-07 r4718 [x86_64-linux-4.16.0-rc1+] (local build) Copyright (C) 2002-18, Bruce Allen, Christian Franke, www.smartmontools.org === START OF INFORMATION SECTION === Vendor: INTEL SS Product: DSA2M080G2GC Revision: 2CV1 Compliance: SPC-4 .... So smartctl thinks its a SCSI device, but if told there is a SATL: # smartctl -a -d sat /dev/sg0 smartctl 6.7 2018-03-07 r4718 [x86_64-linux-4.16.0-rc1+] (local build) Copyright (C) 2002-18, Bruce Allen, Christian Franke, www.smartmontools.org === START OF INFORMATION SECTION === Model Family: Intel X18-M/X25-M/X25-V G2 SSDs Device Model: INTEL SSDSA2M080G2GC Serial Number: CVPO017405HT080JGN .... So now smartctl sees that it is a SATA SSD. BTW there is some discussion on the smartmontool dev list about changing that default. That means that all SCSI storage devices would be checked for the presence of a SATL and if it was present automatically switch to "ATA" mode. Doug Gilbert -- You are receiving this mail because: You are the assignee for the bug.
