What would be better for DR purposes, using Read Sector or Read Multiple. I guess since Read Multiple does an interrupt for each block instead of for each sector it would be faster. But I assume that Read Sectors would be more suited to handle bad's. (of course DMA would be faster, where applicable)

Any ideas?
Thanks

it depends would you handle interrupts or not
here comes the problem
If you would handle interrupts there is no point of using PIO, you can use UDMA mode
If you can't handle interrupts you will not get speed faster than PIO2 and Read Multiple will be slower because you will need to send more commands for Read multiple (Read Mutliple usually can work with 16 sectors at a time max but Read Sectors can work with up to 256 sectors in LBA28 and up to 65536 in LBA48)

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SAN, NAS, RAID, Server, and HDD Data Recovery.

Doomer,

I want to use interrupts, but in addition to UDMA I would still like to have an PIO option for older drives. I will stick to Read Sectors for PIO then.

Thanks for the clarification.