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Conference ssdevo::hsj40_product

Title:	HSJ30/40 Product Conference

Moderator:	SSDEVO::EDMONDS

Created:	Mon Jul 12 1993
Last Modified:	Fri Jun 06 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	1264
Total number of notes:	4958

1238.0. "Bad Batteries under V3.1 and PREFERRED_PATH" by KERNEL::LOANE (Comfortably numb!!) Mon Apr 21 1997 04:07

    One of the major enhancements with HSOF V3.1 appears to be in the area of
    WriteBack Cache Battery failure (and how the controller handles it). I was
    under the impression that when a battery fails, that particular controller
    crashes gracefully, thus causing failover of the devices it was mastering.
    HOWEVER, the V3.1 release notes suggest that even after this failover,
    drives/Raidsets may still be in Mount Verification if the drive/Raidset was
    subject to Controller-Prefered Paths. So, customers will still suffer
    `outages' due to bad batteries (albeit with a quicker resolution by setting
    the disk/Raidset NOPREFERRED_PATH).
    Is the above assumption correct??

T.R Title User Personal
Name Date Lines

1238.1 Not that simple SSDEVO::RMCLEAN Mon Apr 21 1997 10:16 8

T.R	Title	User	Personal Name	Date	Lines
1238.1	Not that simple	SSDEVO::RMCLEAN		`Mon Apr 21 1997 10:16`	8
	Never ASSUME... Especially when talking about batteries! The only time you will get a crash is when you are running dual controller SCSI. Since this is NOT the SCSI conference you will not crash ;-.]. The whole thing is rather complex and I don't want to write a essay here to describe it.

Never ASSUME...

Especially when talking about batteries!  The only time you will get a crash
is when you are running dual controller SCSI.  Since this is NOT the SCSI
conference you will not crash ;-.].

The whole thing is rather complex and I don't want to write a essay here to
describe it.