This message is from the T13 list server.
Pete, That reads totally backwards. "Words 82 thru 84 indicate that a feature is supported ..." This sounds like an implimentation of the device, and not a toggle bit tunable from the host. "Words 85 thru 87 indicate if a feature shown as supported ..." This sounds more like the toggle bit, but is still not clear. We have some UGLY language! What happened to "capable v/s enabled". "Words 82 thru 84 indicate device supports, when the bit is set to one." "Words 85 thru 87 indicate, if supported in words 82 thru 84, enabled, when the bit is set to one." Thus leave the option that it may not be turned off if the vendor chooses. Cheers, Andre Hedrick LAD Storage Consulting Group On Fri, 27 Sep 2002, Mclean, Pete wrote: > This message is from the T13 list server. > > > Words 82 thru 84 indicate that a feature is supported when the bit is set to > one. Words 85 thru 87 indicate if a feature shown as supported in words 82 > thru 84 is enabled. If the feature cannot be disabled, the wording in words > 85 thru 87 says that it is supported to indicate that it cannot be disabled. > > Regards, Pete > > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] > Sent: Friday, September 27, 2002 8:46 AM > To: T13 List Server > Subject: Re: [t13] 48BIT Supported Poll > > > This message is from the T13 list server. > > > > Is this supported/enabled stuff 'on purpose' ? or is it a long-missed typo > ? > > Some quick research shows that this language began in ATA/ATAPI-4. > > Thanx !!! > ----------------------------------------------------------------- > Jim Hatfield > ATA Interface Firmware > Seagate Technology - PSG > e-mail: [EMAIL PROTECTED] > s-mail: 389 Disc Drive; Longmont, CO 80501 USA > voice: 720-684-2120 > fax : 720-684-2711 > ==================================================== > > > > WHOA! > > Apply this to setfeatures on write-cache! > > Just because it is "supported" does not mean it has to be "enabled". > There are many other cases where "support" v/s "enable" may clash. > > I may be off base but not out of the loop. > > Andre Hedrick > LAD Storage Consulting Group > > On Thu, 26 Sep 2002 [EMAIL PROTECTED] wrote: > > > This message is from the T13 list server. > > > > > > > > >The only question (for me) is whether to CHANGE the wording for words > > >100-103 > > >from: "is mandatory if the 48-bit Address feature set is supported." > > >to: "is mandatory if the 48-bit Address feature set is enabled." > > > > >>Supported I understand. What do you mean by "enabled"? Isn't > > >>this one of those features that is always enabled if it is > > >>supported just like 28-bit LBA is always enabled if supported? > > > > Ahhhh !!! > > I never saw that fine point that some of the 'enabled' bits say > > 'supported' !!! > > Yes. If the feature is 'supported' it shall also report 'enabled' > > > > Thanx !!! > > ----------------------------------------------------------------- > > Jim Hatfield > > ATA Interface Firmware > > Seagate Technology - PSG > > e-mail: [EMAIL PROTECTED] > > s-mail: 389 Disc Drive; Longmont, CO 80501 USA > > voice: 720-684-2120 > > fax : 720-684-2711 > > ==================================================== > > > > >
