Hi,
On 5/14/08, Sandeep K Sinha <sandeepksinha@xxxxxxxxx> wrote:
Hi Vijay,
Block I/O is the basic mechanism for DISK access using the SCSI
protocol as the command set. Block I/O is fast and data can be
transmitted in various block sizes like 2K, 4K, 8K, 16K, 64K, 128K,
etc. Block I/O can be done over various transports. Parallel SCSI
cables, copper fiber, optical fiber and even encapsulated and
transmitted over IP networks.
Block I/O is what is used to talk to DISKS.
File I/O is what is used to talk to FILES.
Is Block I/O necessarily a SCSI thing? I thought 'dd' command could be
used for block I/O over devices like floppy, CDROM, and IDE device?
Am I wrong?
--
Shreyansh
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No. IIRC, all transfers between RAM and CPU are block transactions.
However, transfers between CPU cache levels are not block transfers.