C141-E124-01EN2 - 8
b) Data which have been hit by the READ or READ EXTENDED command and transferred to
the INIT once are also objects of caching as long as they are not invalidated.
c) Data transferred from the INIT and written to the disk media by the WRTTE and WRITE
EXTENDED command are objects of caching.
d) Data transferred from the INIT and written to the disk media by the WRITE AND VERIFY
command is not the objects of caching.
(3) Disabling caching data
Various data which are objects of caching in the data buffer are disabled in the following cases.
a) If any of the following commands is issued for the same data block as data which are the object
of caching, that data block ceases to be an object of caching.
xWRITE xWRITE AND VERIFY
xWRITE EXTENDED
b) If any of the following commands is issued, all the data which are objects of caching are
disabled.
xCHANGE DEFINITION xFOR MAT UNIT
xLOG SELECT xLOG SENSE
xMODE SELECT xMODE SELECT EXTENDED
xMODE SENSE xMODE SENSE EXTENDED
xPERSISTENT RSV IN xPERSISTENT RSV OUT
xREAD BUFFER xREAD CAPACITY
xREAD DEFECT DATA xREAD DEFECT DATA (12)
xREAD LONG xREASSIGN BLOCKS
xRECEIVE DIAGNOSTIC RESULTS xRELEASE EXTENDED
xREPORT DEV ID xRESERVE EXTENDED
xSEND DIAGNOSTIC xSET DEV ID
xSTART/STOP UNIT xWRITE BUFFER
xWRITE LONG xWRITE SAME
c) If the data buffer where data which are objects of caching are stored is used by any of the
following commands, the data existing in that data buffer which are objects of caching are
disabled.
xREAD xWRITE EXTENDED
xREAD EXTENDED xWRITE AND VERIFY
xWRITE xVERIFY
d) If any of the following events occurs, all the data which are objects of caching are disabled.
xA RESET condition occurs on the SCSI bus.
xA TARGET RESET message is issued by any INIT.