re three questions about class 2 and tapes

Doug Hagerman, Digital Equipment, 508-841-2145, Flames to /dev/null 17-Apr-1997 2034 hagerman at
Thu Apr 17 17:41:14 PDT 1997

* From the SCSI Reflector (scsi at, posted by:
* "Doug Hagerman, Digital Equipment, 508-841-2145, Flames to /dev/null  17-Apr-1997 2034" <hagerman at>
While I would like to believe that well designed FC systems won't
see bit errors, any 10 minute discussion with a knowledgeable member
of, for example, the jitter working group, will convince one otherwise.
Therefore I would maintain that Ed's comment to the contrary is without
basis. There will be bit errors, all denials to the contrary.

Re determining the class to use in the case of SCC, several people have
pointed out to me that the supported classes are reported in the login
process. The difficulty is that, until one gets INQUIRY data back from
the device, one does not know what SCSI device model it is using.
Therefore, as I understand it, an SCC device would (if both classes
are in use) report that it supports both classes. Using which class,
then, does the initiator send the INQUIRY command to, say, LUN 3?

I'll endeavor to put together a pair of proposals for this (one
per class) to attempt to get the discussion more grounded.

* For SCSI Reflector information, send a message with
* 'info scsi' (no quotes) in the message body to majordomo at

More information about the T10 mailing list