On 1/11/2013 18:36, Nicholas A. Bellinger wrote:
On Fri, 2013-11-01 at 08:03 -0700, Bart Van Assche wrote:
On 31/10/2013 5:24, Sagi Grimberg wrote:
In T10-DIF, when a series of 512-byte data blocks are transferred, each
block is followed by an 8-byte guard. The guard consists of CRC that
protects the integrity of the data in the block, and some other tags
that protects against mis-directed IOs.
Shouldn't that read "logical block length divided by 2**(protection
interval exponent)" instead of "512" ? From the SPC-4 FORMAT UNIT
section:
Why should the protection interval in FORMAT_UNIT be mentioned when it's
not supported by the hardware, nor by drivers/scsi/sd_dif.c itself..?
Hello Nick,
My understanding is that this patch series is not only intended for
initiator drivers but also for target drivers like ib_srpt and ib_isert.
As you know target drivers do not restrict the initiator operating
system to Linux. Although I do not know whether there are already
operating systems that support the "protection interval exponent", I
think it is a good idea to stay as close as possible to the terminology
of the SPC-4 standard.
Bart.
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