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[P.S. USB Mass Storage flatly requires device serialization for every device except USB 1 FS HDD, because in 1998 BIOS folk thought they could demand help in knowing if they were booting from A: or B:.] Sort of straying off topic here, but the reason for this was that we (BIOS folk) needed to be able to preserve the mapping of BIOS drive number to physical device after a USB re-enumeration. For some reason end users took a dim view of having their drive letters change if they plugged a new device in. Whiners. ===================== Al Rickey Emulex Corp. 1921 Corporate Center Circle, Ste. 3B Longmont, CO 80501 720-652-6385 [EMAIL PROTECTED] -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Pat LaVarre Sent: Friday, October 08, 2004 11:24 AM To: forum at t13.org Subject: Re: [t13] Could Model Number field start with manufacturer ID? This message is from the T13 list server. >> For ATAPI CD/DVD devices (to date): I never seen a serial number in >> the IDENTIFY PACKET DEVICE data and I've never noticed a serial >> number returned in the SCSI INQUIRY data either. > > Try Iomega REV drives, both op xA1 Identify and op xA0:12 Inquiry. > > PDT = x05 = DVD/CD, but serialized (at zero recurring cost) same as > Iomega Zip drives. P.S. USB Mass Storage flatly requires device serialization for every device except USB 1 FS HDD, because in 1998 BIOS folk thought they could demand help in knowing if they were booting from A: or B:. People who sell ATAPI devices, especially bootable devices, into the USB/ATAPI bridge market consequently may decide to serialize their ATAPI devices, whenever that serialization does have zero recurring cost. Pat LaVarre http://udfko.blog-city.com/read/732116.htm
