This message is from the T13 list server.
On Tue, 12 Mar 2002 07:34:16 -0300, sraposo wrote: >This message is from the T13 list server. >If someone could answer, I'd like to ask the reason why read/write long was >supressed from ATA-4 on and if it would be possible to these commands become >available again. Can you explain why you think you need R/W Long? Do you think it can be used to read sectors that have uncorrectable ECC errors in hopes of recovering some of the data (BAD IDEA)? Do you think these commands actually can test the extrememly complex ECC algorithms used in today's disk drives (IT CAN NOT)? The commands were removed for two reasons... The are ineffective on today's drives and they have a PIO Data In/Out protocol that was never documented and is slightly different from the standard PIO Data In/Out protocol. *** Hale Landis *** www.ata-atapi.com ***
