IBM DBCA-204860 Hard Drive Specifications - Page 65

Deviations From Standard

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8.0 Deviations From Standard The interface conforms to the Working Document of Information technology - AT Attachment with Packet Interface Extension (ATA/ATAPI-4) Revision 17 dated on October 30th, 1997 with deviation as follows. Write Verify WRITE VERIFY command does not include read verification after write operation. The function is exactly same as WRITE SECTORS command. SMART Return Status SMART R E T U R N STATUS subcommand does not check advisory attributes. That is, the device will not report threshold exceeded condition unless prefailure attributes exceed their corresponding thresholds. For example, Power-On Hours Attribute never results in negative reliability status. Standby Timer Even if IDLE command or STANDBY command is issued with Sector Cuont register value 00h, Standby Timer is not disabled, but it sets default value 109 minutes. In case Sector Count register value is other than 00h, Standby Timer is set to (Sector Count register value) x 5 seconds. Check Power Mode While the drive is in idle mode, F F h is returned as a response to Check Power Mode command. 80h is not used for the response. © Copyright IBM Corp. 1998 57

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8.0
Deviations From Standard
The interface conforms to the Working Document of Information technology - AT Attachment with Packet
Interface Extension (ATA/ATAPI-4) Revision 17 dated on October 30th, 1997 with deviation as follows.
Write Verify
WRITE VERIFY command does not include read verification after write operation.
The function is exactly same as WRITE SECTORS command.
SMART Return Status
SMART
RETURN
STATUS subcommand does not check advisory attributes.
That is, the device will not report threshold exceeded condition unless prefailure attri-
butes exceed their corresponding thresholds. For example, Power-On Hours Attribute
never results in negative reliability status.
Standby Timer
Even if IDLE command or STANDBY command is issued with Sector Cuont reg-
ister value 00h, Standby Timer is not disabled, but it sets default value 109 minutes.
In case Sector Count register value is other than 00h, Standby Timer is set to (Sector
Count register value) x 5 seconds.
Check Power Mode
While the drive is in idle mode, FFh is returned as a response to Check Power Mode
command. 80h is not used for the response.
Copyright IBM Corp. 1998
57