On 11-01-06 02:38 AM, kernel.majianpeng wrote:
At present,I using WD SATA disk:
[root@kedacom device]# smartctl -i /dev/sdo
smartctl version 5.38 [x86_64-redhat-linux-gnu] Copyright (C) 2002-8 Bruce Allen
Home page is http://smartmontools.sourceforge.net/
=== START OF INFORMATION SECTION ===
Device Model: WDC WD2003FYYS-02W0B0
Serial Number: WD-WMAY00749168
Firmware Version: 01.01D01
User Capacity: 2,000,398,934,016 bytes
Device is: Not in smartctl database [for details use: -P showall]
ATA Version is: 8
ATA Standard is: Exact ATA specification draft version not indicated
Local Time is: Thu Jan 6 15:12:37 2011 UTC
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
[root@kedacom device]# cat /sys/block/sdo/device/rev
01.0
[root@kedacom device]# cat /sys/block/sdo/device/model
WDC WD2003FYYS-0
I read ATA spec7, The INQUERY DEVICE command return valued:
Firmware revision 8byte
Model Number 40byte
This may be a bug?
Not our bug. There is a size mismatch between the
ATA 'firmware revision' field (8 bytes) and the
SCSI 'product revision level' field (4 bytes). Given
the mappings defined in the SAT and SAT-2 standards
when an ATA device is being viewed via a SCSI INQUIRY
command only the first 4 bytes of the revision field
are taken.
A compliant SAT layer should support the ATA Information
VPD page which is accessed via the SCSI INQUIRY command
with the EVPD bit set. libata does this:
# sg_inq /dev/sda
standard INQUIRY:
PQual=0 Device_type=0 RMB=0 version=0x05 [SPC-3]
[AERC=0] [TrmTsk=0] NormACA=0 HiSUP=0 Resp_data_format=2
SCCS=0 ACC=0 TPGS=0 3PC=0 Protect=0 BQue=0
EncServ=0 MultiP=0 [MChngr=0] [ACKREQQ=0] Addr16=0
[RelAdr=0] WBus16=0 Sync=0 Linked=0 [TranDis=0] CmdQue=0
[SPI: Clocking=0x0 QAS=0 IUS=0]
length=96 (0x60) Peripheral device type: disk
Vendor identification: ATA
Product identification: INTEL SSDSA2M080
Product revision level: 2CV1
Unit serial number: xxxxxx
# sg_vpd -p ai /dev/sda
ATA information VPD page:
SAT Vendor identification: linux
SAT Product identification: libata
SAT Product revision level: 2CV1
ATA command IDENTIFY DEVICE response summary:
model: INTEL SSDSA2M080G2GC
serial number: xxxxxx
firmware revision: 2CV102HD
The whole of an ATA disk's IDENTIFY DEVICE response (512
bytes) is available in the SCSI ATA Information VPD page.
Doug Gilbert
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