WD specific ATA commands
Read Timer Value
VSC Enable
Feature : 0x45
Count : 0x00
LBA16-24: 0x57
LBA08-15: 0x44
LBA00-07: 0x00
Device : 0xA0
Command : 0x80 (Vendor Specific)
VSC Send Read Key
Feature : 0xD6
Count : 0x01
LBA16-24: 0xC2
LBA08-15: 0x4F
LBA00-07: 0xBE
Device : 0xA0
Command : 0xB0 (SMART Function D6 Write Log)
Log page sent (512 bytes, 00 padded) : 2a 00 01 00 02 00 0d 00 16 00 01 00 00 00 00
VSC Read Timer
Feature : 0xD5
Count : 0x01
LBA16-24: 0xC2
LBA08-15: 0x4F
LBA00-07: 0xBF
Device : 0xA0
Command : 0xB0 (SMART Function D5 Read Log)
Log page read (512 bytes) : Timer value is in 1st byte of the received log page
VSC Disable
Feature : 0x44
Count : 0x00
LBA16-24: 0x57
LBA08-15: 0x44
LBA00-07: 0x00
Device : 0xA0
Command : 0x80 (Vendor Specific)
Write Timer Value
VSC Enable
Feature : 0x45
Count : 0x00
LBA16-24: 0x57
LBA08-15: 0x44
LBA00-07: 0x00
Device : 0xA0
Command : 0x80 (Vendor Specific)
VSC Send Write Key
Feature : 0xD6
Count : 0x01
LBA16-24: 0xC2
LBA08-15: 0x4F
LBA00-07: 0xBE
Device : 0xA0
Command : 0xB0 (SMART Function D6 Write Log)
Log page sent (512 bytes, 00 padded) : 2a 00 02 00 02 00 0d 00 16 00 01 00 00 00 00
VSC Write Timer
Feature : 0xD6
Count : 0x01
LBA16-24: 0xC2
LBA08-15: 0x4F
LBA00-07: 0xBF
Device : 0xA0
Command : 0xB0 (SMART Function D6 Write Log)
Log page sent (512 bytes, 00 padded) : Send Timer value as 1st byte of log page
VSC Disable
Feature : 0x44
Count : 0x00
LBA16-24: 0x57
LBA08-15: 0x44
LBA00-07: 0x00
Device : 0xA0
Command : 0x80 (Vendor Specific)
Meaning of the returned raw value depending on the wdidle3 version
The value 0 is used when the timer is disabled.
The values 1 to 128 are reported in .1s by all wdidle3.exe versions.
The values 129 to 255 are in .1s for version 1.00, but in 30s for versions 1.03 and 1.05
The difference only affects the output, the stored timer is identical between versions. Maybe different WD drives have different beheviour.
| wdidle3 | v1.00 | v1.03 | 14v1.05 | | 0 | disabled | disabled | disabled | | 1 | 100ms | 100ms | 100ms | | 100 | 10s | 10s | 10s | | 128 | 12.8s | 12.8s | 12.8s | | 129 | 12.9s | 30s | 30s | | 130 | 13s | 60s | 60s | | 254 | 25.4s | 3780s | 3780s | | 255 | 25.5s | 3810s | 3810s |
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