scsi interface specification - Plasmon

DRIVE COMMAND SET ACCESS EVENT LOG (ECH)NOTEThe abbreviations, ASC and ASCQ, are used extensively throughoutthis document. ASC represents Additional Sense Code and ASCQrepresents Additional Sense Code Qualifier.ACCESS EVENT LOG (ECH)The ACCESS EVENT LOG command provides a means to access and/or clear data accumulated in theLaserDrive log.ACCESS EVENT LOG Command (ECH)BITBYTE7 6 5 4 3 2 1 0ModeA Mode bit of one activates the Page Code field and puts the LaserDrive in 6000 log mode. A Mode bit ofzero places the LaserDrive in 4000 log mode and the OPT field is activated with pages defined as theywere in the LD 4100/LF 4500 SCSI Interface Specification.CLRIf the CLR bit is set, all logs will be cleared except for the Drive Statistics Log and the Failure Analysis Log.The Log Offset field will be ignored.OPTThe OPT bits select which portion of the 4000 log mode data is to be sent to the Initiator as indicated inTable 6.If any value is placed in the Page Code field, the Mode field must be set. Otherwise, a CHECKCONDITION status will be returned with ILLEGAL REQUEST sense. The Page Code field is defined inTable 7.Log Offset00 ACCESS EVENT LOG (ECH)01 LUN Mode CLR OPT02 Page Code03 Reserved04 Reserved05 Log Offset (MSB)06 Log Offset (LSB)07 Allocation Length (MSB)08 Allocation Length (LSB)09 ReservedThe Log Offset field can be used by systems that cannot transfer a log because it is too long. By specifyingan offset and an allocation length partial transfers of the log can be performed. This feature can only beused when individual logs are specified. Otherwise this field will be ignored. The Log Offset field valuemust be less than the individual log size. Otherwise, a CHECK CONDITION status will be returned with anILLEGAL REQUEST sense key.PLASMON L M S - LD 6100/LF 6600/LF 6602 SCSI INTERFACE SPECIFICATIONPage 28