IBM DTLA-305040 Hard Drive Specifications - Page 179

SMART Read Log Sector Subcommand D5h, SMART Enable Operations Subcommand D8h, Off-line mode

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Off-line mode: The device executes command completion before executing the specified routine. During execution of the routine the device will not set BSY nor clear DRDY. If the device is in the process of performing its routine and is interrupted by a new command from the host, the device will abort or suspend its routine and service the host within two seconds after receipt of the new command. After servicing the interrupting command, the device will resume its routine automatically or not start its routine depending on the interrupting command. Captive mode: When executing self-test in captive mode, the device sets BSY to one and executes the specified self-test routine after receipt of the command. At the end of the routine the device sets the execution result in the Self-test execution status byte (Figure 129 on page 0) and ATA registers as below and executes command completion. Status Error Cyl Low Cyl High Set ERR to one when self-test has failed Set ABRT to one when self-test has failed Set to F4h when self-test has failed Set to 2Ch when self-test has failed 12.32.6 SMART Read Log Sector (Subcommand D5h) This command returns the specified log sector contents to the host. The 512 bytes data are returned at a command and the Sector Count value shall be set to one. The Sector Number shall be set to specify the log sector address. Log sector address 01h 06h 80h-9Fh Content SMART Error Log SMART Self-test log Host vendor specific Type Read Only Read Only Read/Write Figure 128. Log sector addresses 12.32.7 SMART Write Log Sector (Subcommand D6h) This command writes 512 bytes data to the specified log sector. The 512 bytes data are transferred at a command and the Sector Count value shall be set to 1. The Sector Number shall be set to specify the log sector address as shown in the above figure. If Read Only log sector is specified, the device returns ABRT error. 12.32.8 SMART Enable Operations (Subcommand D8h) This subcommand enables access to all S.M.A.R.T. capabilities within the device. Prior to receipt of a SMART Enable Operations subcommand, Attribute Values are neither monitored nor saved by the device. The state of S.M.A.R.T. (either enabled or disabled) will be preserved by the device across power cycles. Once enabled, the receipt of subsequent SMART Enable Operations subcommands will not affect any of the Attribute Values. Upon receipt of the SMART Enable Operations subcommand from the host the device enables S.M.A.R.T. capabilities and functions and then saves any updated Attribute Values to the Attribute Data sector. 12.32.9 SMART Disable Operations (Subcommand D9h) This subcommand disables all S.M.A.R.T. capabilities within the device including the attribute Autosave feature of the device. After receipt of this subcommand the device disables all S.M.A.R.T. operations. Deskstar 40GV & 75GXP hard disk drive specifications 167

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Off-line mode
:
The device executes command completion before executing the specified routine.
During execution of the routine the device will not set BSY nor clear DRDY. If the device is in the process
of performing its routine and is interrupted by a new command from the host, the device will abort or
suspend its routine and service the host within two seconds after receipt of the new command.
After
servicing the interrupting command, the device will resume its routine automatically or not start its routine
depending on the interrupting command.
Captive mode:
When executing self-test in captive mode, the device sets BSY to one and executes the
specified self-test routine after receipt of the command. At the end of the routine the device sets the exe-
cution result in the Self-test execution status byte (Figure 129 on page 0) and ATA registers as below
and executes command completion.
Status
Set ERR to one when self-test has failed
Error
Set ABRT to one when self-test has failed
Cyl Low
Set to F4h when self-test has failed
Cyl High
Set to 2Ch when self-test has failed
12.32.6
SMART Read Log Sector (Subcommand D5h)
This command returns the specified log sector contents to the host.
The 512 bytes data are returned at a command and the Sector Count value shall be set to one. The
Sector Number shall be set to specify the log sector address.
Read/Write
Host vendor specific
80h-9Fh
Read Only
SMART Self-test log
06h
Read Only
SMART Error Log
01h
Type
Content
Log sector address
Figure 128. Log sector addresses
12.32.7
SMART Write Log Sector (Subcommand D6h)
This command writes 512 bytes data to the specified log sector.
The 512 bytes data are transferred at a command and the Sector Count value shall be set to 1. The
Sector Number shall be set to specify the log sector address as shown in the above figure. If Read Only
log sector is specified, the device returns ABRT error.
12.32.8
SMART Enable Operations (Subcommand D8h)
This subcommand enables access to all S.M.A.R.T. capabilities within the device. Prior to receipt of a
SMART Enable Operations subcommand, Attribute Values are neither monitored nor saved by the
device. The state of S.M.A.R.T. (either enabled or disabled) will be preserved by the device across power
cycles. Once enabled, the receipt of subsequent SMART Enable Operations subcommands will not affect
any of the Attribute Values.
Upon receipt of the SMART Enable Operations subcommand from the host the device enables
S.M.A.R.T. capabilities and functions and then saves any updated Attribute Values to the Attribute Data
sector.
12.32.9
SMART Disable Operations (Subcommand D9h)
This subcommand disables all S.M.A.R.T. capabilities within the device including the attribute Autosave
feature of the device. After receipt of this subcommand the device disables all S.M.A.R.T. operations.
Deskstar 40GV & 75GXP hard disk drive specifications
167