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Conference ssag::ask_ssag

Title:Ask the Storage Architecture Group
Notice:Check out our web page at http://www-starch.shr.dec.com
Moderator:SSAG::TERZAN
Created:Wed Oct 15 1986
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:6756
Total number of notes:25276

6586.0. "rx26 compatibility" by TOSSUB::CONDO () Wed Apr 16 1997 05:27

	Hello, 
		We have a problem with a floppy disk model rx26-aa.
		The customer has three personal computer (PC1, PC2 and PC3)
		VENTURIS model 433sx (vers. 1.02) with bios version 4.04.
		Each personal has two floppy disk installed.
		We have verified that there are many compatibility
		problems about data written by the floppies.
		Data written by the floppies in PC1 are unreadable
		from the floppies in PC2 and PC3.
		Data written by the floppies in PC2 are unreadable
		from  the floppies in PC1 and PC3..... 
		.....And so on...
		Sometime we have problem from floppies on the same pc.

		The floppy disk drives are all manufactured by the 
		Mitsubishi (model MF356F-258MD), but with different
		version of hardware:

		      DEC REV.			MITSUBISHI REV.

		1) RX26-AA REV. B02        DATE: FEB95  DEL.REV. A1
		2) RX26-AA REV. B01	   DATE: DEC94  DEL.REV. B
		3) RX26-AA REV. B02	   DATE: JUL96  DEL.REV. A1


		We have tried to install six floppies with the same
		revison, but the problem is still present.
		The customer application uses the floppies to transport
		the data from one pc to others and cannot uses the network.

		Any ideas????
		Thanks in advanced......  Luca

		Crossed in ibmpc-95
T.RTitleUserPersonal
Name		DateLines
6586.1try cross postingSUBSYS::VIDIOT::PATENAUDEAsk your boss for ARRAY's...Wed Apr 16 1997 12:2823
    
    You would be better asking this same question in GIADEV::DECSTATION or
    NOTED::IBMPC-95. That is where the Venturis folk hang out.
    
    As far as the RX is concerned you want to make sure that drive IS
    supported on the Venturis.
    
    I'm typeing this from home so I don't have my specs on hand, but, if
    it is the 2.88 drive and you are using it on a NON-2.88 capable
    controller you will have trouble with compatibility in 2.88 and 1.44
    modes. This is because the drive requires an extra floppy cable signal
    from the controller to enable the HIGH gain erase signal used before
    writting. If not enabled, you get about half the head width of write in
    the middle of old non-2.88 data (in both modes).
    
    If it is a 1.44/720 drive only, then it should work always.
    
    I still support the RX33 but the RX2X drives are mainly a PCBU product
    support by the guys I refered to above.
    
    roger.