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Conference vaxaxp::vmsnotes

Title:	VAX and Alpha VMS
Notice:	This is a new VMSnotes, please read note 2.1
Moderator:	VAXAXP::BERNARDO

Created:	Wed Jan 22 1997
Last Modified:	Fri Jun 06 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	703
Total number of notes:	3722

684.0. "write to shadow set, speed?" by ROM01::OLD_CIPOLLA (Bruno Cipolla) Wed Jun 04 1997 02:12

    if i shadow a "fast" disk (writeback cached hsj) with a "slow" disk
    (local kspza, no WB cache) what is the response time on writes?
    the fast one (1msec) or the slow one (10msec+)?
    
    does the same hold true with triple shadowing? (two fast disks and a
    slow one?)
    
    	Bruno

T.R	Title	User	Personal Name	Date	Lines
684.1		UTRTSC::jgoras-197-2-13.jgo.dec.com::JurVanDerBurg	Change mode to Panic!	`Wed Jun 04 1997 05:50`	5
	Writes are queued in parallel, and the i/o completes as soon as all writes have completed. So the slowest device will determine the best speed. Jur.