** This is the quasi-official and semi-temporary T13 email list server. ** Hello, I looked at the product on the web site to which you referred and have the following comments: there are not a lot of details here about how these folks accomplish the hot swapping of HDD assemblies in their system. I would be willing to bet that, since this is a totally custom system, they are able to remove power to the ATA HDD before allowing the tray assembly to be removed from the system. This is not "hot-swapping" in the SCSI sense of the term and should not damage an ATA drive. In this manner they can also control the swapping of the device so that it doesn't corrupt an active bus. There should be no "IDE-to-SCA-2" adapters available that allow an ATA device to be hot-swapped in the SCSI sense of the term because ATA devices are not designed to survive this type of operation. ATA devices are also not designed to avoid corrupting an active bus if they are hot-plugged into the bus. Though some people may have had success with a limited number of true hot-swap type events with ATA devices, it is my opinion that they voided the device's warranty with the first event (and who knows what happened to other hosts or devices on an active bus). If you want a device that offers true hot-swap capability, I think you have two choices: one, use SCSI systems and devices that are designed with SCA-2 connectors, or, two, carefully design your own connector/device tray/buffer electronics assembly and system that provide SCSI hot-swapping capability as seen by the system at the SCA connector while not exceeding the ability of an ATA device. I write one more time: ATA DEVICES ARE NOT DESIGNED TO BE HOT-SWAPPED. Regards, Mark Evans Maxtor Corporation 500 McCarthy Boulevard Milpitas, CA 95035 USA email: [EMAIL PROTECTED] -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Wednesday, May 09, 2001 5:44 PM To: [EMAIL PROTECTED] Subject: [temp t13] SCA-2 for IDE ** This is the quasi-official and semi-temporary T13 email list server. ** Does anyone know if there is a de facto definition for the use of IDE-to-SCA-2 adapters for hot-swappable IDE HDDs? Whether IDE drives are truly hot-swappable was discussed on this list a few weeks ago. However, the fact remains that devices such as the IFT-6200 shown at http://www.infortrend.com.tw/ contain IDE HDDs (in this case Maxtor 80GB drives), each of which has an IDE-to-SCA-2 adapter to permit hot-swapping. The IFT-6200, while using IDE HDDs, has an external SCSI interface. This interesting fact, though, is independent of my question. The SCA-2 connector definition for SCSI drives is part of SCSI-3, but I know of no document which defines a mapping for the 40 lines on an IDE connector to the 80 lines on an SCA-2 connector. I have received no response from [EMAIL PROTECTED] (at the U.S. office of this Taiwanese company) re: this issue. Thanks. ___________________________________________________________________ Brian A. Berg [EMAIL PROTECTED] Voice: 408.741.5010 Berg Software Design FAX: 408.741.5234 P.O. Box 3488 http://www.bswd.com/ 14500 Big Basin Way, Suite F Consulting: SCSI/FC/SAN/storage Saratoga, CA 95070 USA -- If you have any questions or wish to unsubscribe send a message to Hale Landis, [EMAIL PROTECTED] To post to this list server send your message to [EMAIL PROTECTED] For questions concerning Thistle Grove Industries or TGI's list services please send email to [EMAIL PROTECTED] -- If you have any questions or wish to unsubscribe send a message to Hale Landis, [EMAIL PROTECTED] To post to this list server send your message to [EMAIL PROTECTED] For questions concerning Thistle Grove Industries or TGI's list services please send email to [EMAIL PROTECTED]
