Any issues with 4k block size on SCSI Disks?

John Lohmeyer lohmeyer at
Fri Sep 28 08:48:06 PDT 2001

* From the T10 Reflector (t10 at, posted by:
* John Lohmeyer <lohmeyer at>
The IDEMA group has asked T10 if there are any SCSI standards issues with 
supporting 4k byte block sizes on disk drives.  I do not know of any, but I 
think it prudent to ask on the T10 reflector.

I already know that many operating systems and the PC BIOS have issues.  This 
was not the question directed to us, however.  If you know of any 4k byte 
block size issues in SCSI standards, please reply directly to me.  I will 
summarize the responses I receive and post them to the reflector.


John Lohmeyer                  Email: lohmeyer at
LSI Logic Corp.                Voice: +1-719-533-7560
4420 ArrowsWest Dr.              Fax: +1-719-533-7183
Colo Spgs, CO 80907

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