IBM IC35L036UWDY10 Hard Drive Specifications - Page 205

Supported Message Functions, information transfer phase Command Data Out or Status Phase

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10.2 Supported Message Functions The implementation of the supported messages will also include the following functions. ! Retry SCSI Command or STATUS phase The retry will be caused by the following error condition. - The drive detected SCSI bus parity error (COMMAND phase) - The drive receives INITIATOR DETECTED ERROR MESSAGE during or at the conclusion of an information transfer phase (Command Data Out or Status Phase) Note: The initiator may send the INITIATOR DETECTED ERROR message as a result of an initiator detected SCSI Bus parity error or an internal error. ! Retry MESSAGE IN phase The retry will be caused by the receipt of a MESSAGE PARITY ERROR message or INITIATOR DETECTED ERROR message immediately following a MESSAGE IN phase. Note: The Initiator may send the MESSAGE PARITY ERROR message as a result of an Initiator detected SCSI Bus parity error during the MESSAGE IN phase. The initiator may send the INITIATOR DETECTED ERROR message as a result of an Initiator detected an internal error during the MESSAGE IN phase. ! Receipt of multiple Identify message - The initiator is allowed to send multiple IDENTIFY messages out in order to toggle the disconnect/reconnect permission bit. This may be used to selectively enable or disable disconnect/ reconnect permission during portions of a command. Note that this function does not affect the operation of the Forced Disconnect function. ! MESSAGE REJECT during Drive Disconnection - If the Initiator rejects the SAVE DATA POINTER message, the drive will disable disconnect/ reconnect permission. This is equivalent to receiving an IDENTIFY message with bit 6 equal to zero. This will cause the drive to inhibit the pending disconnection. - If the initiator rejects the DISCONNECT message, the drive will not disconnect but may attempt to disconnect at a later time. This function may be used to selectively disable disconnection during portions of a command. Ultrastar 146Z10 hard disk drive specifications 189

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10.2 Supported Message Functions
The implementation of the supported messages will also include the following functions.
!
Retry SCSI Command or STATUS phase
The retry will be caused by the following error condition.
-
The drive detected SCSI bus parity error (COMMAND phase)
-
The drive receives INITIATOR DETECTED ERROR MESSAGE during or at the conclusion of an
information transfer phase (Command Data Out or Status Phase)
Note:
The initiator may send the INITIATOR DETECTED ERROR message as a result of an initiator
detected SCSI Bus parity error or an internal error.
!
Retry MESSAGE IN phase
The retry will be caused by the receipt of a MESSAGE PARITY ERROR message or INITIATOR
DETECTED ERROR message immediately following a MESSAGE IN phase.
Note:
The Initiator may send the MESSAGE PARITY ERROR message as a result of an Initiator
detected SCSI Bus parity error during the MESSAGE IN phase. The initiator may send the INITIATOR
DETECTED ERROR message as a result of an Initiator detected an internal error during the
MESSAGE IN phase.
!
Receipt of multiple Identify message
-
The initiator is allowed to send multiple IDENTIFY messages out in order to toggle the discon-
nect/reconnect permission bit. This may be used to selectively enable or disable disconnect/
reconnect permission during portions of a command. Note that this function does not affect the
operation of the Forced Disconnect function.
!
MESSAGE REJECT during Drive Disconnection
-
If the Initiator rejects the SAVE DATA POINTER message, the drive will disable disconnect/
reconnect permission. This is equivalent to receiving an IDENTIFY message with bit 6 equal to
zero. This will cause the drive to inhibit the pending disconnection.
-
If the initiator rejects the DISCONNECT message, the drive will not disconnect but may attempt to
disconnect at a later time. This function may be used to selectively disable disconnection during
portions of a command.
Ultrastar 146Z10 hard disk drive specifications
189